Bismuth molybdate tungstate/titanium dioxide/reduced graphene oxide hybrid with multistage heterogeneous structure for Norfloxacin and Rhodamine B removal through adsorption and photocatalytic degradation synergy

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2025-05-01 Epub Date: 2025-01-13 DOI:10.1016/j.materresbull.2025.113314

Mengmeng Zhang, Zhaojun He, Honghe Ren, Yi Huang

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Abstract

A hybrid photocatalyst consisting of bismuth molybdate tungstate/titanium dioxide heterostructure anchored on rGO through a solvothermal method. The construction of heterostructure among bismuth molybdate tungstate, TiO₂ and rGO contributes to the increased light acquisition, reduced band gap energy, improved photocurrent responses and decreased resistance. The resulting bismuth molybdate tungstate/titanium dioxide/reduced graphene oxide (BWMTG) showed 100 % elimination efficiency of norfloxacin and rhodamine B after 180 and 60 min illumination with visible light, respectively, and the corresponding photocatalytic rate constants were 6.1 and 16.2 times of those of bismuth molybdate tungstate, respectively. After five times of recycling, the elimination efficiency of norfloxacin and rhodamine B still remained 89.5 % and 93.9 %, respectively. Furthermore, the adsorption-photocatalyatic synergistic mechanism of BWMTG was proposed. The improved adsorption-photocatalyatic performance can be ascribed to the increased active sites, promoted separation and migration of photo-induced carriers from the synergistic effect of bismuth molybdate tungstate/titanium dioxide loaded on rGO sheets.

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钼酸钨酸铋/二氧化钛/还原性氧化石墨烯复合材料的多级非均相吸附和光催化降解协同去除诺氟沙星和罗丹明B

一种由钼酸铋钨酸盐/二氧化钛异质结构组成的杂化光催化剂，通过溶剂热法锚定在氧化石墨烯上。钼酸钨酸铋、TiO2和rGO之间异质结构的构建增加了光捕获，降低了带隙能量，改善了光电流响应，降低了电阻。得到的钼酸钨酸铋/二氧化钛/还原氧化石墨烯（BWMTG）在可见光照射180和60 min后，对诺氟沙星和罗丹明B的去除效率分别为100%，光催化速率常数分别为钼酸钨酸铋的6.1和16.2倍。5次循环后，诺氟沙星和罗丹明B的去除率分别为89.5%和93.9%。进一步探讨了BWMTG的吸附-光催化协同作用机理。由于负载在氧化石墨烯片上的钼酸铋钨酸盐/二氧化钛的协同作用，增加了活性位点，促进了光诱导载体的分离和迁移，从而提高了吸附光催化性能。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.