摘要
利用钼酸铵为前驱体、葡萄糖为还原剂、醋酸辅助的水热合成路线获得Mo O2纳米晶。通过XRD、FESEM、FT-IR、N2吸附-脱附等分析测试技术获得Mo O2的组成、结构和比表面积,利用水中Cr(VI)和甲基橙作为模拟污染物,评估Mo O2的吸附及光催化性能。实验结果表明:还原剂和酸性反应介质是Mo O2形貌和尺寸的控制因素;具有高比表面积Mo O2-(c)对水中Cr(VI)的吸附性能优于甲基橙、遵循Langmuir单分子层等温吸附,最大吸附容量为75 mg·g-1;钨灯光照可以有效促进Mo O2对甲基橙和Cr(VI)的吸附-光催化活性,分析吸附-光催化反应机理。
Molybdenum dioxide(Mo O2)nanocryatillines have been successfully prepared through a hydrothermal reductive route using ammonium molybdate as precursor and glucose as reducing agent in acetic acid solution.The compositions and structures of Mo O2 were characterized by X-ray powder diffraction(XRD),field emission scanning electron microscopy(FESEM),fourier transform infrared spectra(FT-IR)and Brunauer-Emmett-Teller(BET).Photocatalytic removal and adsorption of aqueous Cr(VI)and MO were employed to assess the photocatalytic activity and absorption capacity of Mo O2.The experimental results revealed that the reducing agent and types of inorganic acids are decisive controlled factors for the morphology and size of Mo O2.Mo O2-(c)with high specific surface areas had better adsorption performance for aqueous Cr(VI)than methyl orange,and the adsorption process of Cr(VI)followed Langmuir isothermal adsorption model,and the maximum adsorption capacity was 75 mg·g-1.It showed that enhanced photocatalytic activity of Mo O2 when tungsten light irradiated to methyl orange aqueous solution and aqueous Cr(VI),and involved adsorbed-photocatalytic mechanism is revealed.
作者
吴光亮
余艳
邱超
叶前进
吉顺育
李靖
WU Guangliang;YU Yan;QIU Chao;YE Qianjin;JI Shunyu;LI Jing(School of Materials and Chemical Engineering,Xuzhou University of Technology,Xuzhou 221111,China;School of Educational Science,Xuzhou University of Technology,Xuzhou 221111,China)
出处
《中国陶瓷》
CAS
CSCD
北大核心
2020年第7期19-26,共8页
China Ceramics
基金
江苏省自然科基金(BK20171168)
江苏高校青蓝工程资助(2018)
江苏省高校自然科学基金重大项目(18KJA430015)
大学生创新训练计划项目(xcx2018011,xcx2019049)。
关键词
纳米MoO2
吸附-光催化
水热还原法
CR(VI)
甲基橙
Molybdenum dioxide nanoparticles
Adsorption-photocatalysis
Hydrothermal reduction route
Hexavalent chromium
Methyl orange
