摘要
A novel layered hexagonal boron nitride/titanium dioxide(h-BN/TiO2) composite photocatalyst has been constructed by anchoring TiO2 nanoflakes on the surface of hBN flakes via a solvothermal method. The morphology and dispersion of TiO2 can be tuned by controlling the amount of flake h-BN. Benefiting from the unique hetero-structure, the photocatalytic performance of the obtained composite toward rhodamine B(Rh B) degradation is greatly enhanced, among which 12 wt% h-BN/TiO2 composites show 3.5 and 6.9 times higher degradation rate than the synthesized TiO2 and commercial TiO2(P25), respectively, and an excellent cycling stability has also been obtained. Moreover, the first-principles calculation reveals the synergetic catalytic effect between TiO2 and h-BN flake, which is found to be responsible for the significantly enhanced photocatalytic performance of h-BN/TiO2 composites.
本文采用溶剂热法将纳米二氧化钛(TiO2)片固定在六方氮化硼(h-BN)片表面,制备了一种新型层状h-BN/TiO2复合光催化剂.由于其独特的异质结构,合成的复合材料对罗丹明B(RhB)降解的光催化性能得到了提高,其中12 wt%h-BN/TiO2的降解率分别比合成的TiO2和P25高3.5倍和6.9倍,同时具有良好的循环稳定性.此外,第一原理计算揭示了TiO2与h-BN片之间的协同催化作用,发现h-BN的引入对h-BN/TiO2复合材料的光催化性能有显著提高.
作者
Qun Li
Xinmei Hou
Zhi Fang
Tao Yang
Junhong Chen
Xiangzhi Cui
Tongxiang Liang
Jianlin Shi
李群;侯新梅;方志;杨涛;陈俊红;崔香枝;梁彤祥;施剑林(Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China;School of Material Science and Technology,University of Science and Technology Beijing,Beijing 100083,China;The State Key Laboratory of High Performance Ceramics and Superfine Microstructures,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;School of Materials Science and Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)
基金
supported by the National Natural Science Foundation for Excellent Young Scholars of China (51522402)
the National Postdoctoral Program for Innovative Talents (BX20180034)
the Fundamental Research Funds for the Central Universities (FRF-TP-18-045A1)
China Postdoctoral Science Foundation (2018M641192)
