A bio-inspired strategy for the interfacial assembly of graphene oxide with in situ generated Ag/AgCl: designing sustainable hybrid photocatalysts 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Physical Chemistry Chemical Physics
年/卷/期
2000 / 19 / 11
页码
7624--30
出版商
Royal Society of Chemistry
ISSN号
1463-9076
作者
Reddy, Thuniki Naveen 1;Begum, Gousia 1;Rana, Rohit Kumar 1 1 Nanomater. Lab., Indian Inst. of Chem. Technol., Hyderabad, Indian Institute of Chemical Technology, Nanomaterials Laboratory, Uppal Road, Hyderabad, 500007, India rkrana@iict.res.in;
摘要
Herein, we report a polyamine-mediated assembly to integrate graphene oxide (GO) sheets with Ag/AgCl to fabricate a hybrid nanocomposite (GO-Ag/AgCl) at nearly neutral pH and ambient temperature. Inspired by the role of polyamines in the excellent integration of components to generate hierarchical nanostructures in biominerals such as diatoms, we showed that our strategy enabled the fabrication of GO-semiconductor composites with a well-integrated structure. The polyamines not only facilitated the in situ generation of Ag/AgCl, but also simultaneously allowed their interaction with GO suitable for visible light active photocatalysis, as revealed by the detailed characterization of the synthesized materials. Consequently, the GO-Ag/AgCl exhibited nearly 5 times higher photocatalytic activity and better photostability than Ag/AgCl under visible light irradiation. The nanocomposite reached its highest activity at the graphene content of 4.16 wt%. Thus, the assembly process represented an effective way to design hybrid composites. Moreover, as a sustainable photocatalyst, it facilitates effective separation of the photogenerated charge carriers at the interface, thereby improving activity and stability.
机翻摘要
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关键词/主题词
catalysis;electron-hole recombination;graphene;nanocomposites;nanofabrication;organic compounds;organic-inorganic hybrid materials;pH;photochemistry;silver;silver compounds;ultraviolet spectra;visible spectra;
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