Feng Jiayu, Li Kai, Wang Xueqian, Yang Xuejin, Hu Kaiqiang, Wang Fang, Ning Ping, Jia Lijuan, Cai Jun
School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, Yunnan, P. R. China.
Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China.
Environ Sci Technol. 2023 Mar 21;57(11):4632-4642. doi: 10.1021/acs.est.3c00065. Epub 2023 Mar 13.
Cu/TiO adsorbents with CuO as the active component were prepared via a simple impregnation method for efficient purification of phosphine (PH) under the conditions of low temperatures (90 °C) and low oxygen concentration (1%). The PH breakthrough capacity of optimal adsorbent (Cu/TiO) is 136.2 mg(PH)·g, and the excellent dephosphorization performance is mainly attributed to its abundant sur face-active oxygen and alkaline sites, large specific surface area, and strong interaction between CuO and the support TiO. Surprisingly, CuO is converted to CuP after the dephosphorization by Cu/TiO. Since CuP is a P-type semiconductor with high added value, the deactivated adsorbent (CuP/TiO) is an efficient heterostructure photocatalyst for photocatalytic removal of Hg (gas) with the Hg removal performance of 92.64% under visible light. This study provides a feasible strategy for the efficient removal and resource conversion of PH under low-temperature conditions and the alleviation of the environmental risk of secondary pollution.
以CuO为活性组分的Cu/TiO吸附剂通过简单浸渍法制备，用于在低温（90℃）和低氧浓度（1%）条件下高效净化磷化氢（PH）。最佳吸附剂（Cu/TiO）的PH穿透容量为136.2 mg(PH)·g，其优异的脱磷性能主要归因于其丰富的表面活性氧和碱性位点、大比表面积以及CuO与载体TiO之间的强相互作用。令人惊讶的是，Cu/TiO脱磷后CuO转化为CuP。由于CuP是一种具有高附加值的P型半导体，失活吸附剂（CuP/TiO）是一种高效的异质结构光催化剂，用于光催化去除Hg（气体），在可见光下Hg去除性能为92.64%。本研究为低温条件下PH的高效去除和资源转化以及减轻二次污染的环境风险提供了一种可行策略。
