School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
J Colloid Interface Sci. 2022 Dec;627:224-237. doi: 10.1016/j.jcis.2022.07.026. Epub 2022 Jul 6.
The design of a photocatalytic system with Z-scheme heterojunction is the key to charge separation. In this paper, a simple synthesis method was used to prepare BiOCl/InVO photocatalyst. The synthesized photocatalyst can effectively degrade pollutants, and inactivate bacteria under LED light irradiation. The optimal ratio of 30% BiOCl/InVO material effectively degraded 78.85% of TC and 97.83% of RhB within 90 min and inactivated Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) in 40 min. This improvement in photocatalytic performance is mainly due to the formation of a Z-scheme heterojunction between BiOCl and InVO, which produces effective charge separation and improves photocatalytic degradation and antibacterial activity. The capture experiment revealed the main active substances. The effects of catalyst dosage and pollutant concentration were investigated in details. The intermediates of TC degradation were identified by mass spectrometry (MS), and the possible photocatalytic degradation pathway was proposed. Capture experiment and related measurements proposed the Z-scheme mechanism. This work emphasizes the importance of heterogeneous structure construction and proposes feasible solutions for the rational design of catalysts with photodegradation and antibacterial properties under LED light.
具有 Z 型异质结的光催化系统的设计是实现电荷分离的关键。本文采用简单的合成方法制备了 BiOCl/InVO 光催化剂。所合成的光催化剂在 LED 光照射下能有效降解污染物和灭活细菌。当 BiOCl/InVO 材料的最佳比例为 30%时，TC 在 90 min 内有效降解了 78.85%，RhB 在 90 min 内有效降解了 97.83%，大肠杆菌（E. coli）和金黄色葡萄球菌（S. aureus）在 40 min 内被灭活。这种光催化性能的提高主要归因于 BiOCl 和 InVO 之间形成了 Z 型异质结，产生了有效的电荷分离，提高了光催化降解和抗菌活性。捕获实验揭示了主要的活性物质。详细考察了催化剂用量和污染物浓度的影响。通过质谱（MS）鉴定了 TC 降解的中间产物，并提出了可能的光催化降解途径。捕获实验和相关测量提出了 Z 型机制。这项工作强调了异质结构构建的重要性，并为在 LED 光下具有光降解和抗菌性能的催化剂的合理设计提出了可行的解决方案。
