ZnONP/g-C_(3)N_(4)柱撑结构复合材料构建及NO光氧化脱除研究  

Fabrication of ZnO NP/g-C_(3)N_(4) column brace structure composites and study on NO photocatalytic oxidation removal performance

作　　者：张博川 许磊[1,2,3] 谢诚 孙永芬 叶千钧 刘燕芝 ZHANG Bochuan;XU Lei;XIE Cheng;SUN Yongfen;YE Qianjun;LIU Yanzhi(Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology,Kunming University of Science and Technology,Kunming 650093,China;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]昆明理工大学微波能工程应用及装备技术国家地方联合工程实验室,昆明650093 [3]昆明理工大学复杂有色金属资源清洁利用国家重点实验室,昆明650093

出　　处：《工程科学学报》2024年第11期2046-2054,共9页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(52374305,51864030);国家重点研发计划资助课题(2023YFA1507703);云南省基础研究重点项目(202101AS070023,202301AV070009)。

摘　　要：随着现代工业的飞速发展,如何实现氮氧化物的有效脱除成为目前亟待解决的重要难题.本研究提出了一种在石墨相氮化碳(g-C_(3)N_(4))表面原位生长纳米氧化锌点阵构建柱撑结构复合材料策略,以实现在可见光下光氧化去除NO.通过离子吸附反应,成功制备了不同氧化锌颗粒负载量的ZnO NP/g-C_(3)N_(4)柱撑结构复合光氧化剂,并对其结构和电子特性进行了研究.结果表明,氧化锌纳米颗粒(ZnO NP)的引入改善了g-C_(3)N_(4)的团聚,提高了比表面积,暴露出更多活性位点.异质结构的构建改善了复合材料能带结构,促进了光生载流子的迁移及分离,光氧化性能显著提升.在可见光照射下质量分数为2.5%的ZnO NP/g-C_(3)N_(4)样品展现出了优异的光氧化性能,对NO体积分数为3×10^(-5)%以下的混合空气光氧化去除表现出优良的高效稳定性.本研究为高性能光氧化剂的设计与构建提供了有效策略,并为消除工业NO污染物提供了技术参考.With the rapid industrial development,air pollution and global climate change have become pressing issues.Addressing the effective removal of nitrogen oxides(NO_(x)),a major contributor to these problems,is crucial.Photo-oxidation technology emerges as a promising solution,offering a new,green method of NO_(x) removal.This technology stands out for its safety,cost-effectiveness,cleanliness,and cycle stability,making it an efficient approach to tackling NO_(x) emissions.In this study,we explore a novel strategy that involves the in-situ growth of ZnO nanodot arrays on surfaces of graphite-phase carbon nitride(g-C_(3)N_(4))to construct column-supported structure composites.These composites are designed for the photo-oxidation removal of NO under visible light.By employing an ion adsorption reaction,ZnO NP/g-C_(3)N_(4) column-supported structure composite photo-oxidizers were successfully synthesized with varying ZnO particle mass fractions of 1%,2.5%,and 5%,respectively.The investigation revealed that introducing ZnO NP significantly increases the specific surface area of the ZnO NP/g-C_(3)N_(4) composites compared to pure g-C_(3)N_(4) samples,which have a specific surface area of 31.092 m^(2)·g^(-1).Specifically,the 2.5%ZnO NP/g-C_(3)N_(4) composites exhibited a substantial increase to 58.063 m^(2)·g^(-1),while the 1%and 5%ZnO NP/g-C_(3)N_(4) composites reached 37.141 m^(2)·g^(-1) and 42.563 m^(2)·g^(-1),respectively.This enhancement in the specific surface area,attributed to the columnar support structure,addresses the stacking issue of the g-C_(3)N_(4) lamellae in the composites.The resulting structure is stretchier and fluffier,exposing a greater number of reactive sites.Furthermore,the construction of a heterostructure improves the energy band structure of the composites,facilitating the migration and separation of photogenerated carriers,which significantly enhances the photo-oxidation performance.During the NO photo-oxidation removal experiments,the ZnO NP/g-C_(3)N_(4) composites demonstrated a marked im

关 键 词：g-C_(3)N_(4) ZNO 纳米材料 光氧化 NO脱除 

分 类 号：TQ09[化学工程]