醇胺基镧(Ⅲ)配合物制备La_(2)O_(3)/TiO_(2)催化剂及光学性能研究  

Study of Preparation and Optical Properties of La_(2)O_(3)/TiO_(2) Catalyst from Alcohol-Amine Lanthanum(Ⅲ)Compound

作　　者：张晓凡 丁玉强 ZHANG Xiao-fan;DING Yu-qiang(School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China)

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214122

出　　处：《安徽化工》2022年第6期85-89,共5页Anhui Chemical Industry

摘　　要：以LaCl3为原料合成醇胺基镧(Ⅲ)配合物1,将其作为前驱体通过原子层沉积法(ALD)制备La_(2)O_(3)/TiO_(2)催化剂。利用红外光谱、核磁氢谱以及热重分析探究了醇胺基镧配合物1的结构与热化学性质。热重分析结果表明,配合物1具有良好的热稳定性和合适的挥发性,满足原子层沉积(ALD)的要求。通过XRD、SEM和UV-Vis吸收光谱表征了La_(2)O_(3)/TiO_(2)催化剂的晶型、形貌及光学性能。结果表明,当循环数为90,沉积温度为200℃时,La_(2)O_(3)/TiO_(2)催化剂对紫外光的吸收最强。与纯的二氧化钛及浸渍法制备的La_(2)O_(3)/TiO_(2)相比,ALD法制备的La_(2)O_(3)/TiO_(2)催化剂对亚甲基蓝的降解速率显著提高至100%。The alcohol-amine lanthanum(Ⅲ)compound 1 is synthesized from LaCl3and is then used as a precursor to prepare La_(2)O_(3)/TiO_(2)catalyst by atomic layer deposition(ALD).~1HNMR spectrum,FTIR,and thermogravimetric analysis(TGA)are used to explore the structure and thermochemical properties of compound 1.The thermogravimetric results show that compound 1 has good thermal stability and suitable volatility to meet the requirements of ALD.The crystal form,morphology,elemental distribution,composition and optical properties of La_(2)O_(3)/TiO_(2)catalysts are characterized by XRD,SEM,EDS and UV-Vis absorption spectra.The results show that when the number of cycles is 90 and the deposition temperature is 200℃,the La_(2)O_(3)/TiO_(2)catalyst has the strongest absorption of ultraviolet light.Compared with the pure titanium dioxide and La_(2)O_(3)/TiO_(2)prepared by impregnation method,the degradation rate of La_(2)O_(3)/TiO_(2)catalyst prepared by ALD method to methylene blue is significantly increased to 100%.

关 键 词：醇胺镧(Ⅲ)配合物 前驱体 热化学性质 La_(2)O_(3)/TiO_(2)催化剂 光学性能 

分 类 号：O643.36[理学—物理化学]