Han Juncheng, Pang Menghan, Meng Donghuan, Qiu Jianrong, Wang Dongbo
School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China.
Guangxi Universities Key Laboratory of Environmental Protection, Guangxi University, Nanning 530004, China.
Materials (Basel). 2023 Feb 24;16(5):1896. doi: 10.3390/ma16051896.
Using low-density solar energy in the environment and converting it into chemical energy that can drive the degradation of organic pollutants is considered to be a very promising strategy for solving the problem of environmental pollution. The efficacy of photocatalytic destruction of organic contaminants is nonetheless constrained by the high composite rate of photogenic carriers, insufficient light absorption and utilization impact, and sluggish charge transfer rate. In this work, we created a new type of heterojunction photocatalyst with a spherical BiSe/BiO@Bi core-shell structure and investigated its degrading properties of organic pollutants in the environment. Interestingly, benefiting from the fast electron transfer capability of the Bi electron bridge, the charge separation and transfer efficiency between BiSe and BiO is greatly improved. In this photocatalyst, BiSe not only has a photothermal effect to speed up the process of photocatalytic reaction, but also has fast electrical conductivity of topological materials at the surface, which speeds up the transmission efficiency of photogenic carriers. As expected, the removal performance of the BiSe/BiO@Bi photocatalyst to atrazine is 4.2 and 5.7 times higher than that of the original BiSe and BiO. Meanwhile, the best samples BiSe/BiO@Bi showed 98.7%, 97.8%, 69.4%, 90.6%, 91.2%, 77.2%, 97.7%, and 98.9% removal of ATZ, 2,4-DCP, SMZ, KP, CIP, CBZ, OTC-HCl, and RhB, and 56.8%, 59.1%, 34.6%, 34.5%, 37.1%, 73.9%, and 78.4% mineralization. Through characterization such as XPS and electrochemical workstations, it is proved that the photocatalytic properties of BiSe/BiO@Bi catalysts are far superior to other materials, and a suitable photocatalytic mechanism is proposed. A novel form of bismuth-based compound photocatalyst is anticipated to be produced as a result of this research in order to address the increasingly critical problem of environmental water pollution in addition to presenting fresh avenues for the creation of adaptable nanomaterials for additional environmental applications.
利用环境中的低密度太阳能并将其转化为可驱动有机污染物降解的化学能，被认为是解决环境污染问题的一种非常有前景的策略。然而，光催化降解有机污染物的效能受到光生载流子复合率高、光吸收和利用效果不足以及电荷转移速率缓慢的限制。在这项工作中，我们制备了一种具有球形BiSe/BiO@Bi核壳结构的新型异质结光催化剂，并研究了其对环境中有机污染物的降解性能。有趣的是，得益于Bi电子桥的快速电子转移能力，BiSe和BiO之间的电荷分离和转移效率大大提高。在这种光催化剂中，BiSe不仅具有光热效应以加速光催化反应过程，而且在表面具有拓扑材料的快速导电性，这加快了光生载流子的传输效率。正如预期的那样，BiSe/BiO@Bi光催化剂对阿特拉津的去除性能分别比原始BiSe和BiO高4.2倍和5.7倍。同时，最佳样品BiSe/BiO@Bi对阿特拉津（ATZ）、2,4-二氯苯酚（2,4-DCP）、磺胺甲恶唑（SMZ）、克林霉素（KP）、环丙沙星（CIP）、卡马西平（CBZ）、盐酸土霉素（OTC-HCl）和罗丹明B（RhB）的去除率分别为98.7%、97.8%、69.4%、90.6%、91.2%、77.2%、97.7%和98.9%，矿化率分别为56.8%、59.1%、34.6%、34.5%、37.1%、73.9%和78.4%。通过X射线光电子能谱（XPS）和电化学工作站等表征，证明了BiSe/BiO@Bi催化剂的光催化性能远优于其他材料，并提出了合适的光催化机理。这项研究有望产生一种新型的铋基复合光催化剂，以解决日益严峻的环境水污染问题，同时为开发适用于其他环境应用的适应性纳米材料提供新途径。
