负载纳米银复合微球制备及其催化性能

引用本文: 郝敏敏, 李晨, 余敏, 张颖. 负载纳米银复合微球制备及其催化性能[J]. 物理化学学报, doi: 10.3866/PKU.WHXB201302042 shu

Citation: HAO Min-Min, LI Chen, YU Min, ZHANG Ying. Synthesis and Catalytic Activity of Silver Nanoparticles Immobilized onto Composite Microspheres[J]. Acta Physico-Chimica Sinica, doi: 10.3866/PKU.WHXB201302042 shu

负载纳米银复合微球制备及其催化性能

基金项目:
国家自然科学基金(21173141) (21173141)

陕西省工业攻关项目(2011K08-14) (2011K08-14)

长江学者和创新团队发展计划(IRT1070) (IRT1070)

陕西师范大学大学生创新研究项目(101071836)资助 (101071836)

摘要:

以具有温度和pH双重敏感性能的N-异丙基丙烯酰胺(NIPAM)共聚丙烯酸(AA) P(NIPAM-co-AA)高分子微凝胶为模板, 以乙醇为还原剂, 原位还原得到负载纳米银的微米尺度Ag/P(NIPAM-co-AA)复合微凝胶材料. 通过扫描电子显微镜(SEM)、X射线衍射(XRD)仪和紫外-可见(UV-Vis)分光光度计等对复合材料的形貌、组成和催化性能进行表征. 研究结果表明, Ag/P(NIPAM-co-AA)复合微球具有均一的表面结构, 微凝胶的限域作用显著提高了纳米银的分散性和稳定性. 另外, Ag/P(NIPAM-co-AA)复合微球对对硝基苯酚(4-NP)的还原具有较好的催化活性, 且其催化活性与微凝胶网络结构的溶胀、收缩行为有一定关系, 即模板微凝胶的温敏特性可以实现对对硝基苯酚催化反应活性的调控作用.

关键词:

English

Synthesis and Catalytic Activity of Silver Nanoparticles Immobilized onto Composite Microspheres

1.
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, P. R. China
Received Date: 22 October 2012
Available Online: 25 March 2013
Fund Project:
国家自然科学基金(21173141)

陕西省工业攻关项目(2011K08-14)

长江学者和创新团队发展计划(IRT1070)

陕西师范大学大学生创新研究项目(101071836)资助

Abstract:

P(NIPAM-co-AA) copolymer microgels with temperature and pH sensitivities were synthesized by copolymerization of N-isopropylacrylamide (NIPAM) and acrylic acid (AA). Ag/P(NIPAM-co-AA) composite microspheres were prepared via in-situ reduction using ethanol as a reducing agent, based upon a polymer microgel template method. The morphology, composition, and catalytic properties of the prepared composite microspheres were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-visible (UV-Vis) spectrophotometry. It was demonstrated that the Ag/P(NIPAM-co- AA) composite microspheres had an uneven surface structure. The confinement effect of the template microgels significantly improved the dispersion and stability of the loaded silver particles. In addition, the obtained composite materials exhibited od catalytic activity for the reduction of 4-nitrophenol (4-NP). The observed catalytic activity was related to the swelling and shrinking behavior of the microgel network structure. The catalysis of 4-nitrophenol reduction was controlled by adjusting the thermo-sensitivity of the polymer template.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

负载纳米银复合微球制备及其催化性能

English

Synthesis and Catalytic Activity of Silver Nanoparticles Immobilized onto Composite Microspheres

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

负载纳米银复合微球制备及其催化性能

English

Synthesis and Catalytic Activity of Silver Nanoparticles Immobilized onto Composite Microspheres

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

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