文献类型：期刊文献

英文题名：Multifunctional 2D porous g-C3N4 nanosheets hybridized with 3D hierarchical TiO2 microflowers for selective dye adsorption, antibiotic degradation and CO2 reduction

作者：Wang, Qiang[1,2,3];Zhang, Lingxia[1,2];Guo, Yangkun[1,2];Shen, Meng[1,2];Wang, Min[1,2];Li, Bing[3,4];Shi, Jianlin[1,2]

机构：[1]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China;[2]Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, 19A Yuquan Rd, Beijing 100049, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]Longyan Univ, Collaborat Innovat Ctr Clean Energy, 1 North Dongxiao Rd, Longyan 364012, Peoples R China

年份：2020

卷号：396

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20202008649967);WOS:【SCI-EXPANDED(收录号:WOS:000551969200139)】；

基金：The authors gratefully acknowledge the financial support provided by the National Key R&D Program of China (2017YFE0127400), National Natural Science Foundation of China (No. 51774145, 51872317 and 21835007) and China Postdoctoral Science Foundation (No. 2019M661644).

语种：英文

外文关键词：Porous g-C3N4 nanosheests; TiO2 microflowers; Micro-nano heteroarchitectures; Selective adsorption; Antibiotic degradation; CO2 reduction

摘要：Seeking effective strategy to design multifunctional materials for pollutant removal and solar fuel production is of great significance for solving the worldwide environment and energy problems. In this work, two-dimensional porous graphite-like carbon nitride (p-g-C3N4) nanosheets (NSs) decorated with three-dimensional (3D) hier-achical TiO2 microflowers (MFs) were constructed through a facile acid hydrothermal route. 3D TiO2 MFs originating from K2Ti6O13 nanobelts were combined with p-g-C3N4 NSs via solid interfacial connections. By chemical exfoliation and etching, the surface area of g-C3N4 was significantly increased along with the formation of porous structures and C vacancies. Interestingly, the hydrothermally produced two-dimensional (2D) p-g-C3N4 NSs showed extraordinarily selective adsorption towards anionic methyl orange via strong electrostatic attraction. More importantly, such 3D/2D TiO2/p-g-C3N4 micro-nano heteroarchitectures exhibited remarkably improved visible-light photocatalytic properties for antibiotic degradation and CO2 reduction, mainly attributed to the enlarged surface areas and pore volumes, increased adsorption/active sites, improved light absorption and higher separation efficiency of photogenerated charge carriers. This one-pot synthesis method opens new possibilities for rational design of multifunctional g-C3N4-based photocatalysts towards environmental purification and solar energy conversion.