CAJ | 학술논문

对比研究了用溶胶-凝胶法和溶胶-乳化-燃烧法与等体积浸渍法结合制备的Cu、Sm共掺杂TiO_2催化剂,并用X射线衍射、紫外可见吸收光谱、拉曼分析等技术表征了催化剂的形貌、结构及吸光性能,样品的表征与光催化活性测试结果表明,Cu和Sm离子的引入使TiO_2样品的吸收带边发生不同程度的红移,使可见光吸收强度增大,协同效应提高了对目的反应的催化活性,Cu掺杂Sm~(3+)/TiO_2样品的最佳掺杂量为w=1.5%～2%之间.
대비연구료용용효-응효법화용효-유화-연소법여등체적침지법결합제비적Cu、Sm공참잡TiO_2최화제,병용X사선연사、자외가견흡수광보、랍만분석등기술표정료최화제적형모、결구급흡광성능,양품적표정여광최화활성측시결과표명,Cu화Sm리자적인입사TiO_2양품적흡수대변발생불동정도적홍이,사가견광흡수강도증대,협동효응제고료대목적반응적최화활성,Cu참잡Sm~(3+)/TiO_2양품적최가참잡량위w=1.5%～2%지간.
Cu and Sm co-doped TiO_2 catalysts were prepared by impregnating Sm~(3+)/TiO_2 (w (Sm)=1%), which were prepared by sol-gel method and sol-emulsion-combustion method previously, with the solutions of cupric salts by incipient wet impregnation method. The catalysts were characterized by techniques of X-ray powder diffractometer (XRD), UV-Vis diffuse reflection spectra and Raman analyses. The results showed that the doping of Cu and Sm resulted in the redshift in the spectral band adsorption of TiO_2 catalyst and enhanced the adsorption in visible light region. The photocatalytic activity for reduction of carbon dioxide to methanol might be improved by the synergistic effect. The appropriate doping quantity of Cu in Sm~(3+)/TiO_2 was 1.5～2 percent by mass.