氮化碳异质结用于光催化还原U(Ⅵ)的研究进展  

Carbonitride Heterojunctions for Photocatalytic Reduction of Uranium(Ⅵ)

作　　者：吴林珍 张玲[1] 孟旗 李姝阳 张友魁 段涛[1,2] WU Lin-zhen;ZHANG Ling;MENG Qi;LI Shu-yang;ZHANG You-kui;DUAN Tao(National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety,State Key Laboratory of Environment-Friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China;Tianfu Institute of Research and Innovation,Southwest University of Science and Technology,Chengdu 610299,China)

机构地区：[1]西南科技大学核废物与环境安全省部共建协同创新中心,环境友好能源材料国家重点实验室,四川绵阳621010 [2]西南科技大学四川天府新区创新研究院,四川成都610299

出　　处：《核化学与放射化学》2024年第4期299-313,I0001,共16页Journal of Nuclear and Radiochemistry

基　　金：国家自然科学基金项目(21976148);国家国防科技工业局基础科研项目(JCKY2018404C008)。

摘　　要：对核工业产生的含铀废水进行铀污染处理和铀资源回收,有利于维护核能的可持续发展。光催化还原技术友好地协同了吸附-还原能力,克服了单一吸附去除的热力学限制,用于核废水中铀去除与回收具有较大的发展潜力。氮化碳基纳米材料因其优异的光化学性能、出色的理化可调性和良好的化学稳定性而被认为是一类光催化U(Ⅵ)还原的理想光催化剂。近年来围绕氮化碳进行的改性和应用研究为光催化铀还原提供了深入见解。近期的研究揭示了基于C_(3)N_(4)的异质结纳米结构的构筑及其对铀的光催化还原过程和机制。本文旨在阐明这一快速发展的主题,立足于光催化还原U(Ⅵ)的机理,着眼于有效改善C_(3)N_(4)的光催化性能,系统总结了基于C_(3)N_(4)异质结光催化材料的设计开发及其在U(Ⅵ)还原中的应用。最后,展望了当前基于C_(3)N_(4)的光催化材料在含铀废水中对U(Ⅵ)的还原去除面临的困难,为未来的突破提供视角和方向。The development and application of nuclear energy is often considered as a potential solution to meet the increasing energy demand.However,it is important to acknowledge that the utilization of nuclear energy resources and the treatment of nuclear waste pollution pose significant challenges that require careful consideration and management.Therefore,it is crucial to address the challenges of uranium pollution treatment and uranium resource recovery to ensure the sustainable development of nuclear energy.The technology of photocatalytic reduction has been found to have a synergistic adsorption reduction ability,which allows it to overcome the thermodynamic limitations of single adsorption removal.As a result,photocatalytic reduction technology is widely recognized as having great potential in the removal and recycling of uranium in nuclear waste liquid.One of the key factors for the effective application of this technology is the acquisition of a catalyst with high photocatalytic reduction ability.Nitride carbon materials are considered an ideal photocatalyst for photocatalytic reduction of U(Ⅵ)due to their excellent photochemical properties,excellent physicochemical adjustability,and good chemical stability.However,the pure g-C_(3)N_(4)photocatalyst still suffers from its low separation efficiency of photogenerated charge carriers,which results in unsatisfactory photocatalytic activity.In recent years,research on modifying and applying carbon nitride has provided in-depth insights into the reduction of uranium through photocatalysis.Discussing the strategy of modifying C_(3)N_(4),constructing heterojunction nanostructures,and utilizing them for the photocatalytic reduction of uranium,along with the mechanisms involved.This review summarizes the recent significant progress on the design of g-C_(3)N_(4)-based heterostructure photocatalysts and their special separation/transfer mechanisms of photogenerated charge carriers.On the one hand,according to the key steps of photocatalytic uranium reduction,modification s

关 键 词：氮化碳 异质结 光催化 铀还原 核废水 

分 类 号：TL941.1[核科学技术—辐射防护及环境保护]