文献类型：期刊文献

英文题名：In situ construction of MnIn2S4/TpBpy Z-scheme heterojunction composites for photocatalytic reduction of U(vi)

作者：Ji, Zhehong[1];Fan, Yuan[1];Li, Wenjing[1];Jin, Yuqing[1];Lei, Nan[1];Li, Ziyan[1];Zhong, Xin[1,2]

机构：[1]Shaoxing Univ, Sch Life & Environm Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China;[2]Zhejiang Key Lab Funct Ion Membrane Mat & Technol, Shaoxing 312000, Peoples R China

年份：2025

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY C

收录：SCI-EXPANDED(收录号：WOS:001552397700001)、、WOS

基金：Financial support from the Research Fund Program of the National Natural Science Foundation of China (No. 22106107), the Natural Science Foundation of Zhejiang Province (LY23B070003), and the Central Government Guiding Local Science and Technology Development Funds (2025ZY01029).

语种：英文

外文摘要：The photocatalytic reduction of uranium (U(vi)) is considered as an effective method for U(vi) resource restoration from seawater. However, insufficient charge separation and rapid recombination of photogenerated carriers restrict photocatalytic applications. The construction of compact heterostructures has proven to be an effective way to realize charge separation and photocatalytic efficiency. Herein, the Z-scheme heterojunction MnIn2S4/TpBpy was engineered and fabricated to realize high-efficiency U(vi) reduction by the synergistic adsorption-photocatalysis strategy. The experimental results showed that the U(vi) removal rate of MIS@TpBpy-30 reached 90.25% (29.26 mg g-1 under irradiation) and its photocatalytic reaction rate constant was 0.0103 min-1, which was 12.1 times higher than that of MnIn2S4 and 3.3 times higher than that of TpBpy, respectively, which was attributed to the construction of the Z-scheme heterojunction to enhance the absorption of visible light and promote the separation of photogenerated electrons and holes. In the photocatalytic process, U(vi) was photo-reduced to UO2 in the presence of (center dot)O2- and e- reactive species, and also, a large amount of H2O2 was generated during the reaction, which further contributed to the deposition of U(vi) as (UO2)O22H2O on the photocatalyst surface. This investigation provided a new possibility for the design and production of MnIn2S4-based composites as photocatalysts for the effective utilization of visible light for U(vi) resource recovery and environmental remediation.