(002) Oriented Bi2O2CO3 Nanosheets with Enhanced Photocatalytic Performance for Toluene Removal in Air

被引：18

作者：

Ding, Junping ^{[1
,2
]}

Wang, Huanchun ^{[3
]}

Luo, Yidong ^{[1
]}

Xu, Yushuai ^{[1
]}

Liu, Jinsheng ^{[2
]}

Lin, Yuanhua ^{[1
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[2] China Astronaut Res & Training Ctr, Beijing 100094, Peoples R China

[3] High Tech Inst Xian, Xian 710025, Shanxi, Peoples R China

来源：

CATALYSTS | 2020年 / 10卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Bi2O2CO3; toluene decomposition; crystal orientation; volatile organic compound (VOCs); photocatalysis; INTERFACIAL CHARGE-TRANSFER; OXIDATION; TIO2; NO; MICROSPHERES; DEGRADATION; ADSORPTION; BENZENE; VOCS; PHOTODEGRADATION;

D O I：

10.3390/catal10040389

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Layer-structured Bi2O2CO3 is a novel photocatalyst for eliminating environmental pollutants. In this work, Bi2O2CO3 nanosheets were synthesized by hydrothermal methods, followed by annealing in nitrogen. (002) oriented Bi2O2CO3 nanosheets were obtained and characterized by XRD, SEM, XPS, BET and UV-Vis diffuse reflectance spectra. Photocatalytic properties were investigated by toluene removal in air, with the assistant of Bi2O2CO3 nanosheets under artificial irradiation. Our results show that Bi2O2CO3 annealed in nitrogen exhibited high full-light-driven photocatalytic activity for toluene photocatalytic decomposition, which may be ascribed to facet orientation evolution during the annealing process and enhanced efficient charge separation. The sample annealed at 150 degrees C for 8 h (BOC-150-8 h) showed high stability and the highest toluene removal rate, which was up to 99%. The final degradation products were detected by gas chromatography-mass spectrometer (GC-MS) and CO2 was verified to be the primary product. Photocatalytic mineralization of toluene in air over Bi2O2CO3 was proposed. This work may provide a foundation for application of annealed Bi2O2CO3 in indoor air purification.

引用

页数：14

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