文献类型：期刊文献

英文题名：Hierarchical macro-mesoporous g-C3N4 with an inverse opal structure and vacancies for high-efficiency solar energy conversion and environmental remediation

作者：Tian, Yunhao[1];Zhou, Liang[1];Zhu, Qiaohong[2,3];Lei, Juying[1,4];Wang, Lingzhi[2,3];Zhang, Jinlong[2,3];Liu, Yongdi[1]

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]East China Univ Sci & Technol, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2019

卷号：11

期号：43

起止页码：20638

外文期刊名：NANOSCALE

收录：;EI(收录号：20194607696802);WOS:【SCI-EXPANDED(收录号:WOS:000502779900025)】；

基金：This work was financially supported by the National Natural Science Foundation of China (21777044, 5171101651, 21677048 and 21811540394), the National Key Research and Development Program (2016YFA0204200), the National Water Pollution Control and Treatment Science and Technology Major Project (2017ZX07207002), Shanghai Municipal Science and Technology (17520711500) and the Fundamental Research Funds for the Central Universities (222201714061, 222201915012, 222201814053, 222201917009 and 222201818014).

语种：英文

外文关键词：Inverse problems - Nitrogen - Silica - Energy conversion efficiency - Chlorine compounds - Mass transfer - Energy efficiency - Hydrogen production - Light absorption - Solar energy - Light - Degradation - Irradiation - Mesoporous materials - Crystal structure - X ray photoelectron spectroscopy

摘要：Hierarchical macro-mesoporous structures with an efficient mass transfer and light harvesting offer great advantages for photocatalysis. Nitrogen vacancy modified ordered hierarchical macro-mesoporous g-C3N4 (Nv MM CN) was fabricated by a dual-templating method combining an ordered SiO2 colloidal crystal and NH4Cl. The as-prepared Nv MM CN was applied for photocatalytic degradation of antibiotics and production of hydrogen. Nv MM CN showed 27 times higher photocatalytic degradation efficiency and 7.5 times higher hydrogen production than bulk g-C3N4 (Bulk CN) under visible light irradiation. The 3D well interconnected macro-mesoporous structure and the porous system accelerated adsorption as well as the reaction rate and the inverse opal photonic crystals provided multiple scattering effects to strengthen light absorption. Meanwhile, the nitrogen vacancy introduced acted as a separation center to capture electrons or holes to improve the separation efficiency of charges. This efficient, stable, and environmentally friendly visible light-driven Nv MM CN may be an alternative for effective implementation in wide-ranging energy and environmental applications.