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Highly Enhanced Full Solar Spectrum‐Driven Photocatalytic CO2 Reduction Performance in Cu2–xS/g‐C3N4 Composite: Efficient Charge Transfer and Mechanism Insight
Solar RRL ( IF 6.0 ) Pub Date : 2020-08-04 , DOI: 10.1002/solr.202000326 Lisha Jiang 1 , Kai Wang 1 , Xiaoyong Wu 1 , Gaoke Zhang 1
Solar RRL ( IF 6.0 ) Pub Date : 2020-08-04 , DOI: 10.1002/solr.202000326 Lisha Jiang 1 , Kai Wang 1 , Xiaoyong Wu 1 , Gaoke Zhang 1
Affiliation
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An efficient full solar spectrum ultraviolet–visible–near infrared (UV–vis–NIR) light‐driven Cu2–xS/g‐C3N4 composite photocatalyst is reported, which is fabricated by a facile solvothermal process for CO2 photoreduction into CO and CH4, as confirmed by product analysis and 13C isotopic test. The composite exhibits superior full solar‐spectrum‐driven CO2 photoreduction performance than pure Cu2–xS and g‐C3N4, which is attributed to the efficient charge transfer due to the formation of intimate interface contact and SC bond coupling between Cu2–xS and g‐C3N4 based on experimental analyses and theoretical calculations. In particular, the activities of the best composite for CO2 photoreduction into CO and CH4 under NIR light irradiation are about 2.6 times and 6.6 times higher than that of Cu2–xS, whereas no production is measured over g‐C3N4. A possible mechanism of photocatalytic CO2 reduction is given based on in situ Fourier transform infrared (FTIR) analysis. This study paves the way to prepare carbon nitride–based photocatalysts with full‐spectrum‐responsive property for efficient CO2 photoreduction.
中文翻译：
Cu2-xS / g-C3N4复合材料中高度增强的全太阳光谱驱动的光催化CO2还原性能：有效的电荷转移和机理研究
报道了一种高效的全太阳光谱紫外可见近红外（UV-vis-NIR）光驱动的Cu 2 – x S / g‐C 3 N 4复合光催化剂，该催化剂是通过简便的溶剂热法制备的，用于CO 2光还原。经产物分析和13 C同位素测试证实，转化为CO和CH 4。与纯Cu 2– x S和g‐C 3 N 4相比，该复合材料具有优异的全太阳光谱驱动的CO 2光还原性能，这归因于由于形成紧密的界面接触和S而导致有效的电荷转移基于实验分析和理论计算，Cu 2 – x S和g‐C 3 N 4之间的C键耦合。特别是，最好的复合材料在近红外光照射下将CO 2光还原为CO和CH 4的活性比Cu 2– x S的活性高约2.6倍和6.6倍，而在g‐C 3 N上没有产生量4。基于原位傅里叶变换红外光谱（FTIR）分析，给出了光催化还原CO 2的可能机理。这项研究为制备具有全光谱响应特性的氮化碳基光催化剂铺平了道路，以实现高效的CO2光还原。
更新日期：2020-08-04
中文翻译：
Cu2-xS / g-C3N4复合材料中高度增强的全太阳光谱驱动的光催化CO2还原性能：有效的电荷转移和机理研究
报道了一种高效的全太阳光谱紫外可见近红外（UV-vis-NIR）光驱动的Cu 2 – x S / g‐C 3 N 4复合光催化剂，该催化剂是通过简便的溶剂热法制备的，用于CO 2光还原。经产物分析和13 C同位素测试证实，转化为CO和CH 4。与纯Cu 2– x S和g‐C 3 N 4相比，该复合材料具有优异的全太阳光谱驱动的CO 2光还原性能，这归因于由于形成紧密的界面接触和S而导致有效的电荷转移基于实验分析和理论计算，Cu 2 – x S和g‐C 3 N 4之间的C键耦合。特别是，最好的复合材料在近红外光照射下将CO 2光还原为CO和CH 4的活性比Cu 2– x S的活性高约2.6倍和6.6倍，而在g‐C 3 N上没有产生量4。基于原位傅里叶变换红外光谱（FTIR）分析，给出了光催化还原CO 2的可能机理。这项研究为制备具有全光谱响应特性的氮化碳基光催化剂铺平了道路，以实现高效的CO2光还原。
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