摘要
The development of low cost, metal free semiconductor photocatalysts for CO2 reduction to fuels and valuable chemical feedstocks is a practically imperative for reducing anthropogenic CO2 emissions. In this work, black phosphorus quantum dots（BPQDs） were successfully dispersed on a graphitic carbon nitride（g-C3N4） support via a simple electrostatic attraction approach, and the activities of BP@g-C3N4 composites were evaluated for photocatalytic CO2 reduction. The BP@g-C3N4 composites displayed improved carrier separation efficiency and higher activities for photocatalytic CO2 reduction to CO（6.54 μmol g^-1h^-1 at the optimum BPQDs loading of 1 wt%） compared with pure g-C3N4（2.65 μmol g^-1h^-1）. This work thus identifies a novel approach towards metal free photocatalysts for CO2 photoreduction.
开发还原二氧化碳生成燃料和有价值化学品的低成本、非金属半导体光催化剂,是减少二氧化碳浓度的一种有效方案.本工作通过简单的静电吸附方法成功地将黑磷量子点(BPQDs)分散在石墨相氮化碳(g-C_3N_4)载体上,成功制备了BP@g-C_3N_4复合材料,并对其在紫外-可见光激发下光催化还原CO_2的性能进行了研究.电化学表征,瞬态吸收光谱和荧光光谱数据表明BPQDs的负载提高了g-C_3N_4的载流子分离效率.在氙灯的照射下,与g-C_3N_4(CO的生成速率为2.1μmol g^(-1)h^(-1))相比,BP@g-C_3N_4复合材料光催化还原CO_2活性显著提高(当BPQDs的负载量为1 wt%时,CO的生成速率为6.54μmol g^(-1)h^(-1)).本工作发展了一种新型的可还原CO_2的非金属基光催化剂.
作者
Chunqiu Han
Jue Li
Zhaoyu Ma
Haiquan Xie
Geoffrey I.N.Waterhouse
Liqun Ye
Tierui Zhang
韩春秋;李珏;马照宇;谢海泉;Geoffrey I.N.Waterhouse;叶立群;张铁锐(Engineering Technology Research Center of Henan Province for Solar Catalysis, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University;School of Chemical Sciences, The University of Auckland;Key Laboratory for Photonic and Electric Bandgap Materials, Ministry of Education, Harbin Normal University;Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences;University of Chinese Academy of Sciences)
基金
supported by the National Natural Science Foundation of China (51502146, U1404506, 21671113, 51772305, 51572270, and U1662118)
the International Partnership Program of Chinese Academy of Sciences (GJHZ1819)
the Royal Society-Newton Advanced Fellowship (NA170422)
supported by Open Fund (PEBM201702) of Key Laboratory for Photonic and Electric Bandgap Materials, Ministry of Education (Harbin Normal University)
