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  1 / 11408 MEDLINE  
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[PMID]:28837873
[Au] Autor:Kim J; Lee C; Lee SM; Lalhmunsiama; Jung J
[Ad] Endereço:Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea.
[Ti] Título:Chemical and toxicological assessment of arsenic sorption onto Fe-sericite composite powder and beads.
[So] Source:Ecotoxicol Environ Saf;147:80-85, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Batch sorption and leaching of arsenic (1-30mgL ) on Fe-sericite composite powder and beads were investigated in this study. Fe-sericite composite powder was made from natural sericite modified with iron, and alginate was used to transform the powder into beads. The maximum sorption capacities of the Fe-sericite composite powder (15.04 and 13.21mgg for As(III) and As(V), respectively) were higher than those of the corresponding beads (9.02 and 7.11mgg for As(III) and As(V), respectively) owing to the higher specific surface area of the powder. In addition, the leaching amounts of As(III) from Fe-sericite composite beads (≤ 15.03%) were higher than those of the corresponding powder (≤ 5.71%). However, acute toxicity of As(III)-sorbed Fe-sericite composite beads toward Daphnia magna was not significantly different from that of the corresponding powder (p > 0.05). Considering higher uptake of the powder particles by the daphnids, Fe-sericite composite beads seem to be a more appropriate and safer sorbent for arsenic removal in practical application. Based on Fe content, Fe-sericite composite beads had similar or higher maximum sorption capacities (71.19 and 56.11mgg Fe for As(III) and As(V), respectively) than those of previously reported sorbents.
[Mh] Termos MeSH primário: Arseniatos/análise
Arsenitos/análise
Ferro/química
Dióxido de Silício/química
Poluentes Químicos da Água/análise
Purificação da Água/métodos
[Mh] Termos MeSH secundário: Adsorção
Alginatos/química
Animais
Arseniatos/toxicidade
Arsenitos/toxicidade
Daphnia/efeitos dos fármacos
Ácido Glucurônico/química
Ácidos Hexurônicos/química
Modelos Teóricos
Tamanho da Partícula
Pós
Propriedades de Superfície
Testes de Toxicidade Aguda
Poluentes Químicos da Água/toxicidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Alginates); 0 (Arsenates); 0 (Arsenites); 0 (Hexuronic Acids); 0 (Powders); 0 (Water Pollutants, Chemical); 0 (sericite); 7631-86-9 (Silicon Dioxide); 8A5D83Q4RW (Glucuronic Acid); 8C3Z4148WZ (alginic acid); E1UOL152H7 (Iron)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170825
[St] Status:MEDLINE


  2 / 11408 MEDLINE  
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[PMID]:29253824
[Au] Autor:Swain B; Shin D; Joo SY; Ahn NK; Lee CG; Yoon JH
[Ad] Endereço:Institute for Advanced Engineering (IAE), Advanced Materials & Processing Center, Yongin-Si, 449-863, Republic of Korea. Electronic address: swain@iae.re.kr.
[Ti] Título:Synthesis of submicron silver powder from scrap low-temperature co-fired ceramic an e-waste: Understanding the leaching kinetics and wet chemistry.
[So] Source:Chemosphere;194:793-802, 2018 Mar.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The current study focuses on the understanding of leaching kinetics of metal in the LTCC in general and silver leaching in particular along with wet chemical reduction involving silver nanoparticle synthesis. Followed by metal leaching, the silver was selectively precipitated using HCl as AgCl. The precipitated AgCl was dissolved in ammonium hydroxide and reduced to pure silver metal nanopowder (NPs) using hydrazine as a reductant. Polyvinylpyrrolidone (PVP) used as a stabilizer and Polyethylene glycol (PEG) used as reducing reagent as well as stabilizing reagent to control size and shape of the Ag NPs. An in-depth investigation indicated a first-order kinetics model fits well with high accuracy among all possible models. Activation energy required for the first order reaction was 21.242 kJ mol for Silver. PVP and PEG 1% each together provide better size control over silver nanoparticle synthesis using 0.4 M hydrazine as reductant, which provides relatively regular morphology in comparison to their individual application. The investigation revealed that the waste LTCC (an industrial e-waste) can be recycled through the reported process even in industrial scale. The novelty of reported recycling process is simplicity, versatile and eco-efficiency through which waste LTCC recycling can address various issues like; (i) industrial waste disposal (ii) synthesis of silver nanoparticles from waste LTCC (iii) circulate metal economy within a closed loop cycle in the industrial economies where resources are scarce, altogether.
[Mh] Termos MeSH primário: Cerâmica/química
Nanopartículas Metálicas/química
Reciclagem
Prata/química
[Mh] Termos MeSH secundário: Resíduos Industriais/análise
Cinética
Pós/síntese química
Pós/química
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Industrial Waste); 0 (Powders); 3M4G523W1G (Silver)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180228
[Lr] Data última revisão:
180228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171219
[St] Status:MEDLINE


  3 / 11408 MEDLINE  
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[PMID]:29370192
[Au] Autor:Debnath SK; Saisivam S; Debanth M; Omri A
[Ad] Endereço:Department of Pharmacy, Bengal College of Pharmaceutical Sciences and Research, Durgapur, West Bengal, India.
[Ti] Título:Development and evaluation of Chitosan nanoparticles based dry powder inhalation formulations of Prothionamide.
[So] Source:PLoS One;13(1):e0190976, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Prothionamide (PTH), a second line antitubercular drug is used to administer in conventional oral route. However, its unpredictable absorption and frequent administration limit its use. An alternate approach was thought of administering PTH through pulmonary route in a form of nanoparticles, which can sustain the release for several hours in lungs. Chitosan, a bio-degradable polymer was used to coat PTH and further freeze dried to prepare dry powder inhaler (DPI) with aerodynamic particle size of 1.76µm. In vitro release study showed initial burst release followed by sustained release up to 96.91% in 24h. In vitro release further correlated with in vivo study. Prepared DPI maintained the PTH concentration above MIC for more than 12h after single dose administration and increased the PTH residency in the lungs tissue more than 24h. Animal study also revealed the reduction of dose in pulmonary administration, which will improve the management of tuberculosis.
[Mh] Termos MeSH primário: Quitosana/química
Nanopartículas/química
Protionamida/administração & dosagem
[Mh] Termos MeSH secundário: Animais
Tamanho da Partícula
Pós
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Powders); 76YOO33643 (Prothionamide); 9012-76-4 (Chitosan)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180126
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190976


  4 / 11408 MEDLINE  
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[PMID]:29352304
[Au] Autor:Wang X; Luo R; Liu C; Zhang L; Yue A; Medina A; Rozelle S
[Ad] Endereço:Education Global Practices (East and South Africa), the World Bank Group, NW, Washington DC, United States of America.
[Ti] Título:Using daily text messages to improve adherence to infant micronutrient powder (MNP) packets in rural western China: A cluster-randomized controlled trial.
[So] Source:PLoS One;13(1):e0191549, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: To evaluate the effectiveness of daily text messages as a means to improve caregivers' adherence to infant micronutrient powder (MNP) in rural Shaanxi Province of China. METHODOLOGY: 638 infants aged 6-11 months in 234 villages were involved in a cluster-randomized controlled trial (RCT). All caregivers were given free infant MNP packets at baseline in April 2013 and the follow-up survey was in July 2013. We randomly assigned 318 infants in 117 villages to treatment group (receiving daily text message) and 320 infants in the other 117 villages as control group. RESULTS: On average, daily text messages increased the number of MNP packets fed (marginal effect = 4.63; 95% confidence interval (CI) = 0.16, 9.10). The text message is more likely to increase the consumption of MNP packets if the primary caregiver was the mother (marginal effect = 12.19; 95% CI = 0.69, 23.68). Receiving the text message appears to significantly increase the likelihood of full adherence when the primary caregiver can either check (odds ratio = 2.93; 95% CI = 1.34, 6.40) or knows how to send (odds ratio = 3.26; 95% CI = 1.53, 6.97) text messages. CONCLUSION: Daily text messages improved the consumption of infant MNP packets. However, the impact was not large enough to increase the probability of caregivers being fully adherent to the feeding instruction, which is to feed 5-7 packets per week as recommended. In addition, when the mother is the caregiver and when the caregiver can check or knows how to send text messages there is greater adherence by the primary caregivers. TRIAL REGISTRATION: http://www.isrctn.com/ISRCTN44149146.
[Mh] Termos MeSH primário: Adesão à Medicação
Micronutrientes/administração & dosagem
Mensagem de Texto
[Mh] Termos MeSH secundário: Cuidadores
China
Feminino
Seres Humanos
Lactente
Alimentos Infantis
Transtornos da Nutrição do Lactente/prevenção & controle
Fenômenos Fisiológicos da Nutrição do Lactente
Masculino
Adesão à Medicação/estatística & dados numéricos
Razão de Chances
Pós
População Rural
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Micronutrients); 0 (Powders)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180121
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191549


  5 / 11408 MEDLINE  
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[PMID]:28746725
[Au] Autor:Duizer LM; Diana A; Rathomi HS; Luftimas DE; Rahmannia S; Santi W; Nugraha GI; Haszard JJ; Gibson RS; Houghton LA
[Ad] Endereço:Dept. of Food Science, Univ. of Guelph, Canada, N1G 2W1.
[Ti] Título:An Acceptability Trial of Desiccated Beef Liver and Meat Powder as Potential Fortifiers of Complementary Diets of Young Children in Indonesia.
[So] Source:J Food Sci;82(9):2206-2212, 2017 Sep.
[Is] ISSN:1750-3841
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The addition of desiccated beef liver to infant and young child complementary foods can be used to overcome nutrient deficits, however its acceptability is unknown. We conducted a series of studies to test the acceptability of complementary foods fortified with either powdered beef liver, beef meat, beef liver + meat or placebo among 96 Indonesian children aged 12 to 23 mo. This was achieved by determining liking of a single test food with added study powder, followed by a 2-wk home trial and focus group discussions to assess liking during repeated consumption of the study powders added to daily meals. The test food with added beef powders were well liked by mothers, with liking scores never falling below neutral on a 7-point scale. After home use, mothers reported that their children moderately liked their meals with added powder, with scores ranging between 3.3 and 3.5 on a 5-point scale. With the exception of lower liking for the combination beef liver + meat powder, there were no detectable differences in mothers' overall perception of child's liking between the placebo and any of the study powders. The low disappearance rate of the study powders during the home trial was a concern, with mothers reporting a strong smell and fishy odor as the major reason why children did not like their meals. Nonetheless, mothers declared they would continue using the powder on account of the nutritional value and perceived health benefits. Strategies are underway to minimize the level of fishy odor in the beef liver powder.
[Mh] Termos MeSH primário: Comportamento do Consumidor
Alimentos Fortificados/análise
Alimentos Infantis/análise
Fígado/química
Carne/análise
[Mh] Termos MeSH secundário: Animais
Bovinos
Feminino
Seres Humanos
Indonésia
Lactente
Fígado/metabolismo
Masculino
Valor Nutritivo
Pós/química
[Pt] Tipo de publicação:CLINICAL TRIAL, PHASE I; CLINICAL TRIAL, PHASE II; JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Nm] Nome de substância:
0 (Powders)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170727
[St] Status:MEDLINE
[do] DOI:10.1111/1750-3841.13807


  6 / 11408 MEDLINE  
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[PMID]:29353552
[Au] Autor:Verhoef H; Teshome E; Prentice AM
[Ad] Endereço:MRC Unit The Gambia, Atlantic Boulevard, Fajara, Gambia. hans.verhoef@icloud.com.
[Ti] Título:Micronutrient powders to combat anaemia in young children: do they work?
[So] Source:BMC Med;16(1):7, 2018 01 22.
[Is] ISSN:1741-7015
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In 2016, the World Health Organization (WHO) recommended point-of-use fortification of complementary foods with iron-containing micronutrient powders to improve iron status and reduce anaemia in children at risk of anaemia. This recommendation continues to be debated. In a recent trial among Kenyan children aged 12-36 months, we found no evidence that daily point-of-use fortification was efficacious in improving haemoglobin concentration or plasma iron markers. An updated meta-analysis indicated that, on average, in an arbitrarily selected setting and with adherence as obtained under trial conditions, one may expect a small increase in haemoglobin concentration in preschool children, with the upper limit of the 95% CI virtually excluding an effect beyond 5.5 g/L. In the present paper, we elaborate on the interpretation of these findings and the meta-analyses that formed the basis for the WHO guidelines. In particular, we draw attention to the phenomenon that small group differences in the distribution of continuous outcomes (haemoglobin concentration, ferritin concentrations) can give a false impression of relatively large effects on the prevalence of the dichotomised outcomes (anaemia, iron deficiency).Please see related articles: https://bmcmedicine.biomedcentral.com/articles/10.1186/s12916-017-0839-z , https://bmcmedicine.biomedcentral.com/articles/10.1186/s12916-017-0867-8.
[Mh] Termos MeSH primário: Anemia Ferropriva/sangue
Micronutrientes/deficiência
[Mh] Termos MeSH secundário: Anemia/sangue
Suplementos Nutricionais
Alimentos Fortificados
Hemoglobinas
Seres Humanos
Quênia/epidemiologia
Pós
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; COMMENT
[Nm] Nome de substância:
0 (Hemoglobins); 0 (Micronutrients); 0 (Powders)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180201
[Lr] Data última revisão:
180201
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180123
[St] Status:MEDLINE
[do] DOI:10.1186/s12916-017-0998-y


  7 / 11408 MEDLINE  
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[PMID]:28448887
[Au] Autor:Wang H; Barona D; Oladepo S; Williams L; Hoe S; Lechuga-Ballesteros D; Vehring R
[Ad] Endereço:Department of Mechanical Engineering, University of Alberta, Edmonton, AB T6G 2G8, Canada.
[Ti] Título:Macro-Raman spectroscopy for bulk composition and homogeneity analysis of multi-component pharmaceutical powders.
[So] Source:J Pharm Biomed Anal;141:180-191, 2017 Jul 15.
[Is] ISSN:1873-264X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A new macro-Raman system equipped with a motorized translational sample stage and low-frequency shift capabilities was developed for bulk composition and homogeneity analysis of multi-component pharmaceutical powders. Different sampling methods including single spot and scanning measurement were compared. It was found that increasing sample volumes significantly improved the precision of quantitative composition analysis, especially for poorly mixed powders. The multi-pass cavity of the macro-Raman system increased effective sample volumes by 20 times from the sample volume defined by the collection optics, i.e., from 0.02µL to about 0.4µL. A stochastic model simulating the random sampling process of polydisperse microparticles was used to predict the sampling errors for a specific sample volume. Comparison of fluticasone propionate mass fractions of the commercial products Flixotide 250 and Seretide 500 simulated for different sampling volumes with experimentally measured compositions verified that the effective sample volume of a single point macro-Raman measurement in the multi-pass cavity of this instrument was between 0.3µL and 0.5µL. The macro-Raman system was also successfully used for blend uniformity analysis. It was concluded that demixing occurred in the binary mixture of l-leucine and d-mannitol from the observation that the sampling errors indicated by the standard deviations of measured leucine mass fractions increased during mixing, and the standard deviation values were all larger than the theoretical lower limit determined by the simulation. Since sample volume was shown to have a significant impact on measured homogeneity characteristics, it was concluded that powder homogeneity analysis results, i.e., the mean of individual test results and absolute and relative standard deviations, must be presented together with the effective sample volumes of the applied testing techniques for any measurement of powder homogeneity to be fully meaningful.
[Mh] Termos MeSH primário: Análise Espectral Raman
[Mh] Termos MeSH secundário: Química Farmacêutica
Fluticasona
Leucina
Manitol
Preparações Farmacêuticas
Pós
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Pharmaceutical Preparations); 0 (Powders); 3OWL53L36A (Mannitol); CUT2W21N7U (Fluticasone); GMW67QNF9C (Leucine)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180125
[Lr] Data última revisão:
180125
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170428
[St] Status:MEDLINE


  8 / 11408 MEDLINE  
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[PMID]:28450674
[Au] Autor:Ida Y; Bae J; Sekine K; Kawano F; Hamada K
[Ad] Endereço:Department of Biomaterials and Bioengineering, Tokushima University Graduate School of Oral Science.
[Ti] Título:Effects of powder-to-liquid ratio on properties of ß-tricalcium-phosphate cements modified using high-energy ball-milling.
[So] Source:Dent Mater J;36(5):590-599, 2017 Sep 26.
[Is] ISSN:1881-1361
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:The authors have developed a ß-tricalcium-phosphate (ß-TCP) powder modified mechano-chemically through the application of a ball-milling process (mß-TCP). The resulting powder can be used in a calcium-phosphate-cement (CPC). In this study, the effects of the powder-to-liquid ratio (P/L ratio) on the properties of the CPCs were investigated, and an appropriate P/L ratio that would simultaneously improve injectability and strength was clarified. The mß-TCP cement mixed at a P/L ratio of 2.5 and set in air exhibited sufficient injectability until 20 min after mixing, and strength similar to or higher than that mixed at a P/L ratio of 2.0 and 2.78. Although the mß-TCP cements set in vivo and in SBF were found to exhibit a lower strength than those set in air, it did have an appropriate setting time and strength for clinical applications. In conclusion, P/L ratio optimization successfully improved the strength of injectable mß-TCP cement.
[Mh] Termos MeSH primário: Cimentos para Ossos
Fosfatos de Cálcio
[Mh] Termos MeSH secundário: Força Compressiva
Cemento Dentário
Seres Humanos
Teste de Materiais
Pós
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bone Cements); 0 (Calcium Phosphates); 0 (Powders)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180124
[Lr] Data última revisão:
180124
[Sb] Subgrupo de revista:D
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE
[do] DOI:10.4012/dmj.2016-341


  9 / 11408 MEDLINE  
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Registro de Ensaios Clínicos
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[PMID]:28468891
[Au] Autor:Monnard A; Moretti D; Zeder C; Steingötter A; Zimmermann MB
[Ad] Endereço:Department of Health Sciences and Technology, Laboratory of Human Nutrition, ETH Zürich, Zurich, Switzerland; and.
[Ti] Título:The effect of lipids, a lipid-rich ready-to-use therapeutic food, or a phytase on iron absorption from maize-based meals fortified with micronutrient powders.
[So] Source:Am J Clin Nutr;105(6):1521-1527, 2017 Jun.
[Is] ISSN:1938-3207
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Ready-to-use-therapeutic foods (RUTFs) high in lipid, protein, and iron are used to treat malnutrition. Lipids increase gastric residence time, which could increase iron absorption, particularly from poorly soluble iron compounds and in combination with phytase. The objectives were to ) assess the effect on iron absorption of a lipid emulsion given 20 min before or together with an iron-fortified maize meal and ) assess iron absorption from a micronutrient powder (MNP) given with a nutrient-dense RUTF and/or a microbial phytase. A total of 41 women participated in 3 studies. They consumed a maize meal fortified with isotopically labeled ferrous sulfate (FeSO ; study 1) or ferric pyrophosphate (FePP; study 2). In studies 1 and 2, a lipid emulsion was given with or 20 min before the meal. In study 3, with the use of a 2 × 2 factorial design, subjects consumed a maize meal fortified with an MNP containing labeled FeSO (MNP) given with an RUTF (MNP+RUTF), with a phytase (MNP+phytase), or both (MNP+RUTF+phytase). Iron absorption was assessed by isotope incorporation in erythrocytes 14 d after the test meals. The lipid emulsion given either before or with the meal significantly increased iron absorption from FePP by 2.55-fold (95% CI: 1.48-, 4.37-fold; = 0.001) but not from FeSO There was a trend to increase iron absorption with the MNP+RUTF meal, which did not reach significance (1.21-fold; 95% CI: 0.92-, 1.61-fold; = 0.060). The addition of phytase to MNP and MNP+RUTF significantly increased iron absorption by 1.85-fold (95% CI: 1.49-, 2.29-fold; < 0.001), with no interaction between phytase and RUTF. In iron-fortified maize-based meals, the addition of lipids more than doubles iron absorption from FePP. Our results suggest the possibility of an enhancing effect on iron absorption of lipid-rich RUTFs, but more research is needed to determine this. This trial was registered at clinicaltrials.gov as NCT01991626.
[Mh] Termos MeSH primário: 6-Fitase/farmacologia
Alimentos Fortificados
Absorção Intestinal/efeitos dos fármacos
Ferro na Dieta/sangue
Ferro/sangue
Lipídeos/farmacologia
Micronutrientes/sangue
[Mh] Termos MeSH secundário: Adulto
Suplementos Nutricionais
Difosfatos/sangue
Eritrócitos/metabolismo
Feminino
Ferritinas/sangue
Seres Humanos
Refeições
Pós
Adulto Jovem
Zea mays
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Diphosphates); 0 (Iron, Dietary); 0 (Lipids); 0 (Micronutrients); 0 (Powders); 9007-73-2 (Ferritins); E1UOL152H7 (Iron); EC 3.1.3.26 (6-Phytase); QK8899250F (ferric pyrophosphate)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:180121
[Lr] Data última revisão:
180121
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:170505
[Cl] Clinical Trial:ClinicalTrial
[St] Status:MEDLINE
[do] DOI:10.3945/ajcn.116.142976


  10 / 11408 MEDLINE  
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[PMID]:28466599
[Au] Autor:Barwe S; Andronescu C; Masa J; Ventosa E; Klink S; Genç A; Arbiol J; Schuhmann W
[Ad] Endereço:Analytical Chemistry, Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, 44780, Bochum, Germany.
[Ti] Título:Polybenzoxazine-Derived N-doped Carbon as Matrix for Powder-Based Electrocatalysts.
[So] Source:ChemSusChem;10(12):2653-2659, 2017 06 22.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:In addition to catalytic activity, intrinsic stability, tight immobilization on a suitable electrode surface, and sufficient electronic conductivity are fundamental prerequisites for the long-term operation of particle- and especially powder-based electrocatalysts. We present a novel approach to concurrently address these challenges by using the unique properties of polybenzoxazine (pBO) polymers, namely near-zero shrinkage and high residual-char yield even after pyrolysis at high temperatures. Pyrolysis of a nanocubic prussian blue analogue precursor (K Mn [Co(CN) ] ⋅n H O) embedded in a bisphenol A and aniline-based pBO led to the formation of a N-doped carbon matrix modified with Mn Co O nanocubes. The obtained electrocatalyst exhibits high efficiency toward the oxygen evolution reaction (OER) and more importantly a stable performance for at least 65 h.
[Mh] Termos MeSH primário: Benzoxazinas/química
Carbono/química
Nitrogênio/química
Polímeros/química
[Mh] Termos MeSH secundário: Catálise
Cobalto/química
Eletroquímica
Manganês/química
Nanoestruturas/química
Pós
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Benzoxazines); 0 (Polymers); 0 (Powders); 3G0H8C9362 (Cobalt); 42Z2K6ZL8P (Manganese); 7440-44-0 (Carbon); N762921K75 (Nitrogen)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:180118
[Lr] Data última revisão:
180118
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170504
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201700593



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