CAJ | 학술논문

以硫脲为掺杂剂,采用溶胶-凝胶法制备了氮硫共掺杂TiO2(N,S-TiO2)。用比表面孔隙仪(BET)、X射线衍射仪(XRD)、紫外-可见漫反射(UV-Vis DRS)和X射线光电子能谱(XPS)对制备的光催化剂进行了表征,用表面光电压仪( SPS)和捕获剂研究了光催化剂的光生电荷分离效应。以甲基橙为模拟污染物,在模拟自然光照射下考察了样品的光催化性能。结果表明：硫脲/Ti的摩尔比为30%所制备氮硫共掺杂TiO2具有较高的光催化活性,光催化活性是纯TiO2的5倍。氮硫共掺杂使TiO2具有更高的比表面和光生电荷分离效应,从而有利于提高光催化活性。
이류뇨위참잡제,채용용효-응효법제비료담류공참잡TiO2(N,S-TiO2)。용비표면공극의(BET)、X사선연사의(XRD)、자외-가견만반사(UV-Vis DRS)화X사선광전자능보(XPS)대제비적광최화제진행료표정,용표면광전압의( SPS)화포획제연구료광최화제적광생전하분리효응。이갑기등위모의오염물,재모의자연광조사하고찰료양품적광최화성능。결과표명：류뇨/Ti적마이비위30%소제비담류공참잡TiO2구유교고적광최화활성,광최화활성시순TiO2적5배。담류공참잡사TiO2구유경고적비표면화광생전하분리효응,종이유리우제고광최화활성。
N-S co-doped anatase TiO2 photocatalyst was successfully prepared by a sol-gel method using thiourea as dopant. The as-synthesized photocatalysts were characterized by Brunauer-Emmett-Teller(BET)method,X-ray diffraction(XRD),UV-Vis diffuse reflectance spectroscopy(UV-Vis DRS)and X-ray photoelectron spectroscopy(XPS). The separation efficiency of photo-generated charges carriers of photocatalyst was investigated using scavenger and surface photovoltage spectroscopy(SPS). The photocatalytic performance of the samples was investigated by utilizing decolorization of methyl orange( MO) aqueous solution under simulated so-lar light irradiation. The result showed that 30N,S-TiO2 had the higher photocatalytic under the simulated natural light illumination and the photocatalytic activity of 30N,S-TiO2 was five times of that of TiO2. The enhanced photocatalytic activity of the as-synthe-sized N,S-TiO2 is mainly attributed to the higher BET surface area and high separation efficiency of photo-induced charger carriers.