(沈陽(yáng)理工大學(xué) 環(huán)境與化學(xué)工程學(xué)院，沈陽(yáng) 110159)
摘 要: 以玉米秸稈為模板，采用溶膠-凝膠法制備S摻雜FeVO4光催化劑，并通過(guò)X射線衍射(XRD)、掃描電鏡(SEM)、樣品比表面積分析(BET)、X射線光電子能譜分析(XPS)和紫外可見吸收光譜(UV-Vis)等測(cè)試手段，對(duì)樣品進(jìn)行表征。結(jié)果表明：S摻雜前后光催化劑均為三斜型，摻雜后樣品的表面形貌產(chǎn)生了變化，比表面積輕微增大；摻雜的S取代FeVO4晶格氧，生成更多的氧空位及Fe2+，同時(shí)增強(qiáng)樣品的光吸收性能。在可見光照射下，通過(guò)光催化降解甲基橙溶液評(píng)價(jià)S摻雜對(duì)FeVO4光催化劑活性的影響，當(dāng)S摻雜(摩爾比)為6%時(shí)，F(xiàn)eVO4對(duì)甲基橙溶液的脫色率較未摻雜前提高約49%。
關(guān)鍵字: S摻雜；FeVO4；可見光光催化；溶膠-凝膠法
（College of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China）
Abstract:S-doped FeVO4 photocatalysts were successfully prepared by sol-gel method taking the corn stem as template and characterized with X-ray diffraction (XRD), scanning electron microscope (SEM), specific surface area (BET), X-ray photoelectron spectroscopy (XPS) and UV-vis absorption spectroscopy (UV-Vis). The results demonstrate that all the FVO or S/FVO photocatalysts consist of triclinic phase, S doping has great influence on morphology but little on specific surface area. XPS spectra show that S doping replaces the subsistent O, and S-Fe-O form. The photocatalytic activity was evaluated via visible-light by photocatalytic oxidation of methyl orange (MO). The results of photocatalytic degradation to methyl orange show that S doping can improve the photocatalytic activity and the MO decoloration rate is more 49% than that of pure FeVO4 when S doping is 6%.
Key words: S-doping; FeVO4; visible-light photocatalysis; sol-gel method
