CdS/石墨烯纳米复合物的可见光催化效率和抗光腐蚀行为(英文)

制备了一系列CdS纳米晶/石墨烯(CdS/GR)复合物,并在可见光照条件下评价了其光催化降解亚甲基蓝的光催化效率和抗光腐蚀行为.研究表明,石墨烯的引入加速了CdS纳米晶(NCs)光生电子的迁移速率,抑制了其光生电子-空穴的复合,有效改善了其光催化降解有机污染物的性能.CdS/GR复合物中的石墨烯含量显著影响其光催化效率,其中石墨烯含量为4.6%的光催化剂效率最高,其光电流是CdS NCs的2.3倍.利用光电化学和X射线衍射技术进一步证实,石墨烯的引入抑制了CdS NCs光腐蚀的发生,提高了CdS/GR复合物的光催化稳定性....

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Bibliographic Details
Published in催化学报 Vol. 34; no. 10; pp. 1876 - 1882
Main Author 严佳佳 王坤 许晖 钱静 刘巍 杨兴旺 李华明
Format Journal Article
LanguageChinese
Published 江苏大学化学化工学院现代农业设备与技术重点实验室,江苏镇江,212013 2013
Subjects
亚甲基蓝降解
光催化
抗光腐蚀
石墨烯纳米复合物
硫化镉纳米晶
抗光腐蚀
硫化镉纳米晶
石墨烯纳米复合物
CdS nanocrystal
Photocatalysis
Methylene blue degradation
光催化
Graphene nanocomposite
Anti-photocorrosion
亚甲基蓝降解
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Summary:制备了一系列CdS纳米晶/石墨烯(CdS/GR)复合物,并在可见光照条件下评价了其光催化降解亚甲基蓝的光催化效率和抗光腐蚀行为.研究表明,石墨烯的引入加速了CdS纳米晶(NCs)光生电子的迁移速率,抑制了其光生电子-空穴的复合,有效改善了其光催化降解有机污染物的性能.CdS/GR复合物中的石墨烯含量显著影响其光催化效率,其中石墨烯含量为4.6%的光催化剂效率最高,其光电流是CdS NCs的2.3倍.利用光电化学和X射线衍射技术进一步证实,石墨烯的引入抑制了CdS NCs光腐蚀的发生,提高了CdS/GR复合物的光催化稳定性.
Bibliography:21-1195/O6
CdS nanocrystal;Graphene nanocomposite;Anti-photocorrosion Photocatalysis;Methylene blue degradation
Jiajia Yan;Kun Wang;Hui Xu;Jing Qian;Wei Liu;Xingwang Yang;Huaming Li;Key Laboratory of Modern Agriculture Equipment and Technology,School of Chemistry and Chemical Engineering,Jiangsu University
A series of CdS nanocrystals/graphene(CdS/GR) nanocomposites with various graphene contents were prepared.Their photocatalytic efficiencies and anti-photocorrosion behavior were studied using methylene blue degradation under visible-light irradiation.The results showed that the introduction of graphene improved the migration efficiency of photogenerated carriers and inhibited charge carrier recombination.The photocatalytic efficiencies of the as-prepared CdS/GR nanocomposites were influenced by the graphene content,achieving a maximum at a graphene content of 4.6 wt%(denoted by CdS/GR-4.6%).The anti-photocorrosion behavior of the CdS/GR-4.6% nanocomposite was further investigated using a photoelectrochemical m
ISSN:0253-9837
1872-2067
DOI:10.1016/S1872-2067(12)60677-9