期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 33, 页码 27727-27735出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b07657
关键词
photocatalysis; g-C3N4; mesoporosity; nunesheets; disinfection; pollutant degrcidation; visible light
资金
- National S&T Support Program of China [2015BAD17B02]
- National Natural Science Foundation of China [21375049]
- China Postdoctoral Science Foundation [2016M601718]
- Fundamental Research for the Central Universities [JUSRP51714B]
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province
Porous g-C3N4 nanosheet (PCNS) photocatalyst with a thickness of 2.0 nm, pore volume of 0.61 cm(3) g(-1), and surface area of 190.1 m(2) g(-1) was prepared by a simple two-step template-free approach without the addition of extra reagents. Compared with the bulk g-C3N4 (BCN), PCNS possesses a greater number of surface reactive sites, improved efficiency of charge transfer, and accelerated separation of photogenerated electronhole pairs. Accordingly, the visible-light-driven photocatalytic disinfection performance and organic pollutant degradation activity of PCNS are significantly enhanced. Escherichia coli (E. coli) cells can be killed completely by PCNS within 4 h, whereas only 77.1% of E. coli cells can be killed by BCN. The photodegradation rates of PCNS on methylene blue, Acid Red 27, and bisphenol A are almost 6.4, 4.0, and 1.9 times as fast as that of BCN, respectively. The photocurrent intensity of PCNS is about 3.7 times in comparison with that of BCN. Considering the easy preparation and excellent performance, PCNS could be a promising and competitive visible-light-driven photocatalyst in the field of environment remediation.
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