CAJ | 학술논문

采用溶胶-凝胶法制备了硫掺杂二氧化钛粉体(S-TiO2),采用 XRD、Nano-series Sizer、FT-IR、UV-Vis、PL等方法对其进行表征和分析。结果表明, S掺杂抑制了TiO2从锐钛矿相向金红石相的转变,减小了粒子间的团聚,拓展了 TiO2对可见光的吸收范围,有效地抑制了光生电子-空穴对的复合。光催化降解亚甲基蓝(MB)的实验表明,n(S)∶n(Ti)=0.14,450℃烧结的S-TiO2粉体具有最佳光催化性能,在普通日光灯下对亚甲基蓝的降解率3 h 达74.12%,明显优于德国 Degussa 公司生产的 P25纯 TiO2光催化剂对亚甲基蓝的降解率31.89%。
채용용효-응효법제비료류참잡이양화태분체(S-TiO2),채용 XRD、Nano-series Sizer、FT-IR、UV-Vis、PL등방법대기진행표정화분석。결과표명, S참잡억제료TiO2종예태광상향금홍석상적전변,감소료입자간적단취,탁전료 TiO2대가견광적흡수범위,유효지억제료광생전자-공혈대적복합。광최화강해아갑기람(MB)적실험표명,n(S)∶n(Ti)=0.14,450℃소결적S-TiO2분체구유최가광최화성능,재보통일광등하대아갑기람적강해솔3 h 체74.12%,명현우우덕국 Degussa 공사생산적 P25순 TiO2광최화제대아갑기람적강해솔31.89%。
S doped TiO2 powder (S-TiO2 )were synthesized by sol-gel method.The obtained samples were char-acterized by XRD,nano-series sizer,FT-Raman,UV-Vis,PL,respectively.The results show that S-doping can inhibit the TiO2 phase transition anatase to rutile,reduce the reunion between the particles,broaden the ab-sorption spectrum to the visible light region,and inhibit the recombination of photoelectron-hole pairs.The ex-periments of photocatalytic degradation of methylene blue (MB)indicate that the photocatalytic activity of the S-TiO2 powder prepared at n(S)∶n(Ti)=0.14(molar ratio)and the calcinated temperature of 450 ℃ was the best.Under the fluorescent light irradiation,the degradation rate of the S-TiO2 sample to methyl blue reaches 74.12% for 3 h,which was obviously higher than 31.89% of P25 TiO2 photocatalyst which made in Degussa, German.