Published: 17 October 2023| Version 1 | DOI: 10.17632/644kb9pvhm.1
Ying Liang


We present data from a paper entitled "In Situ Growth of BiOBr on copper foam conductive substrates with Enhanced photocatalytic Properties". With the development of global industrialization, a large amount of industrial wastewater generated in the process of industrial production enters the environment, posing a serious threat to human health and ecological safety. Therefore, it is of great significance to develop a green, efficient and energy-saving technology to reduce organic pollutants in industrial wastewater. Semiconductor photocatalysis technology powered by solar energy is considered as a potential technology to achieve green, safe and sustainable degradation of organic pollutants. However, in the process of photocatalysis, the common photocatalysts have some shortcomings, such as wide band gap, fast photoexcited electron/hole recombination, and complex separation and recovery process. This study provides a new idea for the design and synthesis of highly practical photocatalysts using conductive substrates. In this study, by in-situ growing BiOBr (BiOBr/Cu foam) on Cu foam, the shortcomings of common photocatalysts such as wide band gap, fast photoexcited electron/hole recombination, complex separation and recovery process are avoided. MB represents organic pollutant. The photodegradation performance of copper foam at different BiOBr dosages was evaluated. The photocatalytic performance of BiOBr/Cu foams under sunlight irradiation was evaluated with the photodegradation rate of 10 mg L-1 to 1 MB. As shown in Figure 4a, in the absence of catalyst, the removal rate of MB was 22.5% after 100 min of sunlight irradiation. The reason may be due to its photolysis self-degradation. In the case of Cu foam, the photodegradation rate of MB is not different from that without catalyst, indicating that Cu foam has no photocatalytic activity. In contrast, in the presence of BiOBr under solar light, the concentration of MB is significantly photodegraded. In particular, by loading BiOBr onto Cu foam, 0.1 BiOBr/Cu foam, 0.2 BiOBr/Cu foam, and 0.3 BiOBr/Cu foam showed significantly higher photocatalytic activity than the original BiOBr. The photodegradation rates of 0.1 BiOBr/Cu foam, 0.2 BiOBr/Cu foam and 0.3 BiOBr/Cu foam on MB were 45.6%, 52.4% and 98.9%, respectively, indicating that 0.3 BiOBr/Cu foam showed excellent photocatalytic performance in other samples. And it is easily separated from the solution for reuse. According to quenching analysis, •OH is a key factor in MB photodegradation. Loading BiOBr on Cu foam improves the photodegradation performance of MB, because Cu foam acts as an electron scavenger in BiOBr/Cu foam, promoting charge separation and the generation of light pores, thus producing more hydroxyl radicals. These findings are expected to provide new strategies for the design and synthesis of conductive substrate composite photocatalysts to efficiently photodegrade contaminants in the environment.