Novel ternary BiOCl/TiO₂/clinoptilolite nanocomposites with highly-enhanced photocatalytic activity under visible light were prepared by a facile hydrothermal route combining with a water bath precipitation procedure. The obtained samples were characterized by means of XRD, SEM, TEM, TG-DSC, N₂ adsorption-desorption, XPS, FTIR, and UV-vis DRS in detail. In the nanocomposites, bismuth oxychloride nanosheets (BNSs) and titanium dioxide nanoparticles (TNPs) were uniformly dispersed on the surface of flake-like clinoptilolite. Sodium isopropyl xanthate (SIPX) was selected as the target contaminant to estimate the photocatalysis of the obtained nanocomposites. Obviously, BiOCl/TiO₂/clinoptilolite photocatalyst showed more excellent adsorption and degradation performance for SIPX than single TiO₂ or BiOCl as well as their binary composites with clinoptilolite. Given that the characterization analysis and experimental results, the highly-enhanced photocatalytic activity was mainly attributed to the effective construction of BiOCl/TiO₂ heterojunction and the excellent adsorption ability of clinoptilolite in BiOCl/TiO₂/clinoptilolite nanocomposites. Radical scavenger tests demonstrated that superoxide radical anions ($·O_2^{-}$) and photogenerated holes (h⁺) were the dominant active species in the reaction system. It is proposed that such novel nanocomposites could be used as efficient photocatalysts for the complete degradation of xanthates under visible light.

通过简便的水热途径结合水浴沉淀法制备了新型三元BiOCl / TiO ₂ /斜发沸石纳米复合材料，在可见光下具有较高的光催化活性。借助XRD，SEM，TEM，TG-DSC，N ₂吸附-脱附，XPS，FTIR和UV-vis DRS对样品进行了表征。在纳米复合材料中，氯氧化铋纳米片（BNSs）和二氧化钛纳米颗粒（TNPs）均匀地分散在片状斜发沸石的表面上。选择异丙基黄原酸钠（SIPX）作为目标污染物，以评估获得的纳米复合材料的光催化作用。显然，BiOCl / TiO ₂/斜发沸石光催化剂对SIPX的吸附和降解性能优于单TiO ₂或BiOCl以及它们与斜发沸石的二元复合材料。鉴于其表征分析和实验结果，其高的光催化活性主要归因于BiOCl / TiO ₂异质结的有效构建以及斜发沸石在BiOCl / TiO ₂ /斜发沸石纳米复合材料中的优异吸附能力。自由基清除剂测试表明，超氧自由基阴离子（$·{Ø}_2^{--}$）和光生空穴（h ⁺）是反应系统中的主要活性物质。提出这种新型纳米复合材料可用作有效的光催化剂，以在可见光下完全降解黄药。