Feng Yanmei, Chen Daimei, Zhong Yi, He Zetian, Ma Shiqing, Ding Hao, Ao Weihua, Wu Xiangfeng, Niu Min
Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Material Sciences and Technology, China University of Geosciences, Xueyuan Road, Haidian District, Beijing 100083, China.
Hebei Key Laboratory of New Materials for Collaborative Development of Traffic Engineering and Environment, Shijiazhuang Tiedao University, Shijiazhuang 050043, China.
ACS Appl Mater Interfaces. 2023 Feb 9. doi: 10.1021/acsami.2c19703.
Photocatalytic reduction of CO into valuable hydrocarbon fuels is one of the green ways to solve the energy problem and achieve carbon neutrality. Exploring photocatalyst with low toxicity and high-efficiency is the key to realize it. Here we report a lead-free halide perovskite-based 0D/2D CsBiBr/BiWO (CBB/BWO) S-scheme heterojunction for CO photoreduction, prepared by a facile electrostatic self-assembly approach. The CBB/BWO shows superior photoreduction of CO under visible light with CO generation rate of 220.1 μmol·g·h, which is ∼115.8 and ∼18.5 times higher than that of CsBiBr perovskite quantum dots (CBB PQDS) and BiWO nanosheets (BWO NS), respectively. The improved photocatalytic activity can be attributed to the tight 0D/2D structure and S-scheme charge transfer pathway between the CsBiBr PQDS and atomic layers of the BiWO NS, which shortens transmission distance of photogenerated carriers and boosts efficient separation and transfer of the carriers. This work provides insight in manufacturing potential lead-free perovskite-based photocatalysts for achieving carbon neutrality.
将二氧化碳光催化还原为有价值的碳氢燃料是解决能源问题和实现碳中和的绿色途径之一。探索低毒高效的光催化剂是实现这一目标的关键。在此，我们报道了一种基于无铅卤化物钙钛矿的0D/2D CsBiBr/BiWO（CBB/BWO）S型异质结用于二氧化碳光还原，通过简便的静电自组装方法制备。CBB/BWO在可见光下表现出优异的二氧化碳光还原性能，一氧化碳生成速率为220.1 μmol·g·h，分别比CsBiBr钙钛矿量子点（CBB PQDS）和BiWO纳米片（BWO NS）高约115.8倍和18.5倍。光催化活性的提高可归因于紧密的0D/2D结构以及CsBiBr PQDS与BiWO NS原子层之间的S型电荷转移途径，这缩短了光生载流子的传输距离，促进了载流子的有效分离和转移。这项工作为制造潜在的用于实现碳中和的无铅钙钛矿基光催化剂提供了思路。
