基于球磨法的TiO_(2)/煤气化渣复合材料的构建及其光催化性能研究  

Construction of TiO_(2)/coal gasification slag composites via the ball milling method and their photocatalytic properties

作　　者：孙静[1] 韩金泰 申婷婷[1] 王晨[1] 冯庆 刘若冰 SUN Jing;HAN Jintai;SHEN Tingting;WANG Chen;FENG Qing;LIU Ruobing(School of Environmental Science and Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China)

机构地区：[1]齐鲁工业大学(山东省科学院)环境科学与工程学部,山东济南250353

出　　处：《山东科学》2025年第2期80-88,共9页Shandong Science

基　　金：齐鲁工业大学科教产融合试点工程基础研究类项目(2022PY047);国家自然科学青年基金项目(21908118);山东省高等学校“青创团队”计划项目(2023K139)。

摘　　要：煤气化渣是煤化工生产的固体废弃物之一,在固体废弃物中占据重要比例。综合利用煤气化渣的天然属性(高比表面积、孔容积)及构成特性(富含碳元素)等特点,采用机械球磨法将煤气化渣与常规光催化剂二氧化钛(TiO_(2))进行复合,拓宽TiO_(2)的光响应范围,并以染料废水为处理对象,评价其光催化性能。通过对复合材料进行X射线衍射(XRD)、红外光谱(FTIR)、扫描电子显微镜(SEM)等表征,探索了TiO_(2)/煤气化渣复合材料催化降解亚甲基蓝溶液的最佳工艺条件。结果显示,在可见光的条件下,TiO_(2)/煤气化渣复合材料的光催化体系降解效率优于锐钛矿TiO_(2)、P25型TiO_(2)(P25)和煤气化渣/P25的效果,其中质量比为90∶10的TiO_(2)/煤气化渣复合材料效果最佳。经红外表征及自由基猝灭实验发现,羟基自由基作为重要的活性物种参与到了光催化降解亚甲基蓝反应中。同时,煤气化渣与TiO_(2)通过Ti—O—Si键进行有效结合,拓宽了TiO_(2)的光响应范围,增加了材料的接触面积。与锐钛矿TiO_(2)相比,其催化效率提高了4.96倍。催化降解效率在循环三次后仍可稳定维持在90%以上,说明TiO_(2)/煤气化渣复合材料具有优异的降解效率和稳定性。∶Coal gasification slag is a solid waste generated during coal chemical production and accounts for a notable proportion of solid wastes.Leveraging the natural properties(e.g.,high specific surface area and pore volume)and compositional characteristics(rich in carbon)of coal gasification slag,this study used the mechanical ball milling method to composite coal gasification slag using a conventional photocatalyst titanium dioxide(TiO_(2))for broadening the photocatalytic response range of TiO_(2).Dye wastewater was used as the treatment object to evaluate the photocatalytic performance of the resulting composite material.Characterization techniques such as X-ray diffraction,Fourier Transform infrared spectroscopy,and scanning electron microscopy were used to investigate the optimal process conditions for the catalytic degradation of a methylene blue(MB)solution by the TiO_(2)/coal gasification slag composite material.Results show that under visible-light conditions,the degradation efficiency of the developed composite material(TiO_(2)∶slag ratio of 90∶10)is higher than those of anatase TiO_(2),P25,and the coal gasification slag/P25 composite material.Infrared characterization and free-radical quenching experiments indicated that coal gasification slag and TiO_(2)effectively bonded through Ti—O—Si bonds,expanding the photocatalytic response range of TiO_(2)and increasing the photocatalytic reaction contact area.In addition,hydroxyl radicals were identified as the primary active substances responsible for degrading MB.Compared with anatase TiO_(2),the catalytic efficiency of the composite material increased by 4.96 times.Furthermore,its catalytic degradation efficiency remained above 90%after three cycles,indicating that the TiO_(2)/coal gasification slag composite material has excellent degradation efficiency and stability.

关 键 词：煤气化渣 二氧化钛 可见光 光催化 染料废水 

分 类 号：X703[环境科学与工程—环境工程]