S、Cr共掺杂TiO2纳米材料的固相合成及其可见光降解性能

采用固相反应法分别合成了铬掺杂二氧化钛(Cr-TiO2)及硫和铬共掺杂二氧化钛(S-Cr-TiO2)纳米材料.并用XRD、SEM、UV-Vis、XPS、N2吸附等技术对材料进行了物相结构表征,同时研究了材料对水溶苯胺蓝的可见光降解性能.结果表明,在S-Cr-TiO2纳米材料中,硫以阳离子S6+进入二氧化钛晶格或晶格间隙...

Solid State Synthesis of S and Cr Co-Doped TiO2 Nanomaterials and Its Visible Light Degradation Property

S and Cr co-doped TiO2 nanomaterials（S-Cr-TiO2） and Cr doped TiO2 nanomaterials were synthesized by solid state reaction method.The textural properties of the samples were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,ultraviolet visible spectrometry（UV-Vis）,X-ray photoelectron spectroscopy（XPS） and N2 adsorption-desorption technology.The photodegradation properties of water soluble aniline blue（ANB） on the materials from irradiating with visible light were investigated.The results showed that S atoms as S6＋ states have been incorporated into the lattice of TiO2 or the interstice of TiO2 lattice,and Cr ions occupy the sites of Ti in crystal lattice by isomorphous replacement.The form of S-Cr-TiO2 nanomaterials was anatase phase.S and Cr co-doping TiO2 can effectively embarrass the crystal growth of TiO2.Interestingly,the UV-vis diffuse reflection absorption spttrum showed that the absorption region of S-Cr-TiO2 material covered the visible light region and extended to near infrared region.Moreover,at 25℃,pH 6.5,the rule of pseudo-first-order reaction and high catalytic activity were found in the visible light degradation of ANB on the S-Cr-TiO2 nanomaterials.Within 120min,the visible light degradation ratio of ANB was 83.7%.The reaction rate constant of S-Cr-TiO2 material was 1.96 times and 1.38 times corresponding to pure TiO2 and Cr-TiO2,respectively.