College of Environment and Resources, Guangxi Normal University, Guilin, Guangxi, 541004, PR China.
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education, China, Guilin, Guangxi, 541004, PR China.
Environ Sci Pollut Res Int. 2021 Dec;28(48):69059-69073. doi: 10.1007/s11356-021-15294-3. Epub 2021 Jul 20.
CuO/BiO oxides grown on nickel foam were synthesized via an electrodeposition method to degrade indoor HCHO under visible light irradiation and fully characterized by XRD, SEM, FT-IR, and UV-Vis technologies. The characterization results showed that the CuO/BiO oxides were successfully loaded on nickel foam and the visible light response spectrum was expanded to 740 nm. Plackett-Burman design combined with central composite design has been used to optimize factors that affect HCHO removal performance. The results demonstrated that bismuth nitrate content, polyethylene glycol 600 content, sintering time, and lactic acid concentration were the four most important factors affecting the HCHO removal performance over CuO/BiO sample. The optimum CuO/BiO sample could degrade 88.796% of HCHO in 300 min at the conditions of 4.28 mol/L lactic acid, 4.86% polyethylene glycol 600, 194.03 min sintering time, and 45.83 g bismuth nitrate, and the HCHO removal rate remained 82.3% after five cycles. A plausible mechanism for the degradation of HCHO under visible light irradiation was proposed. This work provides a feasible solution for removing indoor formaldehyde in the field of photocatalysis.
采用电化学沉积法在泡沫镍上合成了氧化铜/氧化铋复合氧化物，通过 XRD、SEM、FT-IR 和 UV-Vis 等技术对其进行了全面表征。表征结果表明，氧化铜/氧化铋复合氧化物成功负载在泡沫镍上，可见光响应光谱扩展到 740nm。采用 Plackett-Burman 设计结合中心复合设计优化了影响 HCHO 去除性能的因素。结果表明，硝酸铋含量、聚乙二醇 600 含量、烧结时间和乳酸浓度是影响 CuO/BiO 样品 HCHO 去除性能的四个最重要因素。在 4.28mol/L 乳酸、4.86%聚乙二醇 600、194.03min 烧结时间和 45.83g 硝酸铋的条件下，最优的 CuO/BiO 样品在 300min 内可将 HCHO 降解 88.796%，五次循环后 HCHO 的去除率仍保持在 82.3%。提出了可见光照射下 HCHO 降解的可能机理。这项工作为光催化领域去除室内甲醛提供了一种可行的解决方案。
