文献类型：期刊文献

英文题名：An inverse opal TiO2/g-C3N4 composite with a heterojunction for enhanced visible light-driven photocatalytic activity

作者：Lei, Juying[1,2];Chen, Bin[1];Lv, Weijia[1];Zhou, Liang[1];Wang, Lingzhi[3,4];Liu, Yongdi[1,2];Zhang, Jinlong[3,4]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[3]East China Univ Sci & Technol, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：48

期号：10

起止页码：3486

外文期刊名：DALTON TRANSACTIONS

收录：;EI(收录号：20191106614742);WOS:【SCI-EXPANDED(收录号:WOS:000460302800033)】；

基金：This work was financially supported by the National Natural Science Foundation of China (21777044), the National Key Research and Development Program (2016YFA0204200), the China Postdoctoral Science Foundation (2015T8049), and the Fundamental Research Funds for the Central Universities (222201714061, 222201817009, 222201815006 and 222201818014).

语种：英文

外文关键词：Rhodium compounds - Organic pollutants - Light absorption - Biodegradation - Optical properties - Photocatalytic activity - Photoluminescence - Rate constants - Heterojunctions

摘要：A TiO2/g-C3N4 composite photocatalyst with an inverse opal structure and heterojunction has been successfully prepared by a relatively facile approach. The catalyst was characterized by a combination of XRD, SEM, HRTEM, XPS, PL, EIS and DRS techniques and applied for the photocatalytic degradation of organic pollutants represented by Rhodamine B, phenol and levofloxacin. The results of RhB degradation showed that the rate constant of inverse opal TiO2/g-C3N4 with the best compound ratio is 0.184 min(-1), which is 2.7 times faster than that of normal TiO2/g-C3N4 and 4.2 times faster than that of inverse opal TiO2. The enhancement of photocatalytic activity may be attributed to the matched overlapping band structure and the interaction between inverse opal g-C3N4 and TiO2. The inverse opal structure of g-C3N4 has improved the optical absorption properties of g-C3N4 and the interaction between inverse opal g-C3N4 and TiO2 creates more interfaces for the efficient transfer of photogenerated electron-hole pairs to restrict the recombination, which was proved from the photoluminescence spectra (PL). Moreover, a possible photocatalytic mechanism has been tentatively proposed according to the experimental results. All in all, both the inverse opal structure and heterojunction construction play significant roles in the excellent photocatalytic degradation performance according to the mechanism investigation.