La-doped TiO2 nanopowders were synthesized via sol-gel process,and X-ray diffraction(XRD),UV-visble absorption spectra techniques were applied to investigated thes phase structure and spectrum properties as-synthesize...La-doped TiO2 nanopowders were synthesized via sol-gel process,and X-ray diffraction(XRD),UV-visble absorption spectra techniques were applied to investigated thes phase structure and spectrum properties as-synthesized samples.The influence of La3+ doping on the structure and phase transformation behaviors of anatase to rutile TiO2 powders was investigated by means of XRD.UV-vis adsorption spectroscopy revealed that La-doped TiO2 has a strong a adsorption band and the absorption edge were red-shifted compartion with pure TiO2.The experiment results of photocatalytic decomposition of methyl-organge indicated that La-doping restrained the transformation of anatase to rutile and growth of grain.Therefore,La-doping improved the TiO2 photocatalytic activity in photodegradation of methyl-organge.In addition,experiments also illustrate that the catalyst has good activity of decolor rate of Yan’an cigarette factory wastewater.展开更多
在异丙醇水溶液中以钛酸丁酯为钛源,MoS2为敏化剂,硅藻土为负载剂,通过溶胶-凝胶法和水热法制备TiO2/MoS2@硅藻土的复合光催化剂。通过傅里叶红外光谱(FT-IR)、X射线衍射(XRD)、漫反射光谱(DRS)、扫描电镜(SEM)和N2吸附-脱附对催化剂组...在异丙醇水溶液中以钛酸丁酯为钛源,MoS2为敏化剂,硅藻土为负载剂,通过溶胶-凝胶法和水热法制备TiO2/MoS2@硅藻土的复合光催化剂。通过傅里叶红外光谱(FT-IR)、X射线衍射(XRD)、漫反射光谱(DRS)、扫描电镜(SEM)和N2吸附-脱附对催化剂组成、形貌及结构进行分析,以亚甲基蓝(MB)为降解有机污染物目标,降解MB溶液前后的浓度比值(ct/c0)为评价指标,对催化剂种类及催化剂的用量进行了优化研究。结果表明,TiO2/MoS2@硅藻土复合催化剂稳定性高,催化活性强,1 mg/mL该复合催化剂降解50 mL 3~10 mg/L的MB溶液,ct/c0值范围为0.015~0.048。降解过程符合一级反应动力学Langmuir-Hinshelwood方程。展开更多
文摘La-doped TiO2 nanopowders were synthesized via sol-gel process,and X-ray diffraction(XRD),UV-visble absorption spectra techniques were applied to investigated thes phase structure and spectrum properties as-synthesized samples.The influence of La3+ doping on the structure and phase transformation behaviors of anatase to rutile TiO2 powders was investigated by means of XRD.UV-vis adsorption spectroscopy revealed that La-doped TiO2 has a strong a adsorption band and the absorption edge were red-shifted compartion with pure TiO2.The experiment results of photocatalytic decomposition of methyl-organge indicated that La-doping restrained the transformation of anatase to rutile and growth of grain.Therefore,La-doping improved the TiO2 photocatalytic activity in photodegradation of methyl-organge.In addition,experiments also illustrate that the catalyst has good activity of decolor rate of Yan’an cigarette factory wastewater.
文摘在异丙醇水溶液中以钛酸丁酯为钛源,MoS2为敏化剂,硅藻土为负载剂,通过溶胶-凝胶法和水热法制备TiO2/MoS2@硅藻土的复合光催化剂。通过傅里叶红外光谱(FT-IR)、X射线衍射(XRD)、漫反射光谱(DRS)、扫描电镜(SEM)和N2吸附-脱附对催化剂组成、形貌及结构进行分析,以亚甲基蓝(MB)为降解有机污染物目标,降解MB溶液前后的浓度比值(ct/c0)为评价指标,对催化剂种类及催化剂的用量进行了优化研究。结果表明,TiO2/MoS2@硅藻土复合催化剂稳定性高,催化活性强,1 mg/mL该复合催化剂降解50 mL 3~10 mg/L的MB溶液,ct/c0值范围为0.015~0.048。降解过程符合一级反应动力学Langmuir-Hinshelwood方程。
