FeOOH/TiO_(2)纳米膜光催化还原Cr(Ⅵ)性能研究  

Performance research on photocatalytic reduction of Cr(Ⅵ)by FeOOH/TiO_(2) nanofilm

作　　者：王徐越 Wang Xuyue(PowerChina Eco-Environmental Group Co.,Ltd.,Shenzhen 518100,China)

机构地区：[1]中电建生态环境集团有限公司,广东深圳518100

出　　处：《化学推进剂与高分子材料》2025年第1期36-41,共6页Chemical Propellants & Polymeric Materials

基　　金：国家自然科学基金项目(41372054)。

摘　　要：采用物理混合法,制成蒙脱石–石墨烯(MMTGR)复合基底;采用分子自组装法,合成FeOOH/TiO_(2)纳米膜及FeOOH/TiO_(2)/MMTGR复合材料。研究半导体矿物材料复合、基底性质等对光催化还原Cr(Ⅵ)的具体影响。实验结果表明FeOOH/TiO_(2)/MMTGR材料光催化性能最佳。FeOOH与TiO_(2)复合形成异质结,促进光生电子–空穴对的分离,有效提高了材料对Cr(Ⅵ)的光催化还原性能。相较蒙脱石基底而言,MMTGR复合基底吸附Cr(Ⅵ)性能有了较大提升,同时MMTGR能够参与并加速电子传递过程,从而加速了光催化还原Cr(Ⅵ)速率。研究结果对今后开发应用于土壤、水环境污染修复的高效光催化剂具有理论指导意义。Montmorillonite-graphene(MMTGR)composite substrate was prepared by physical mixing method.FeOOH/TiO2 nanofilm and FeOOH/TiO_(2)/MMTGR composite were synthesized by molecular self-assembly method.The specific effects of semiconductor mineral material composite,substrate properties,etc.on the photocatalytic reduction of Cr(Ⅵ)were investigated.The experimental results showed that FeOOH/TiO_(2)/MMTGR materials had the optimal photocatalytic performance.The FeOOH composite with TiO_(2) formed a heterojunction,which promoted the separation of the photo generated electron-hole pairs and effectively improved the photocatalytic reduction performance of the material for Cr(Ⅵ).Compared with the montmorillonite substrate,the adsorption performance of MMTGR composite substrate for Cr(Ⅵ)had been greatly improved.Meanwhile,MMTGR could participate in and accelerate the electron transfer process,thereby accelerating the photocatalytic reduction rate of Cr(Ⅵ).The research results had the theoretical guidance significance for the development and application of high efficient photocatalysts for soil and water pollution remediation in the future.

关 键 词：FEOOH TiO_(2) 纳米膜 光催化 Cr(Ⅵ) 

分 类 号：TQ032[化学工程] TQ034