磷钼酸/聚乙烯醇复合纤维膜光降解甲基橙  

Photocatalytic degradation of methyl orange by H_3PMo_(12)O_(40)/PVA electrospinning fiber membranes

作　　者：刘策[1] 李婷婷[2,3] 张志明[2,3] 安立宝[4] 李争阳 李玉青[2,3] 

机构地区：[1]河北联合大学化学工程学院,唐山063009 [2]河北联合大学材料科学与工程学院 [3]河北省无机非金属材料重点实验室,唐山063009 [4]河北联合大学机械工程学院,唐山063009

出　　处：《环境工程学报》2015年第2期615-620,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51172062);河北省科技支撑计划项目(12213802);河北省自然科学基金资助项目(E2012209017);唐山市科技计划项目(12140201A-9);河北省引进海外高层次人才"百人计划"资助项目(201200005);河北联合大学青年科学研究基金(z201105);河北省高等学校科学技术研究项目(QN2014051)

摘　　要：运用静电纺丝技术制备了磷钼酸(H3PMo12O40)/聚乙烯醇(PVA)复合纤维膜,并对复合纤维膜光催化降解甲基橙模拟废水进行了研究。红外(FT-IR)测试显示,磷钼酸在复合纤维膜中仍保持Keggin结构。通过扫描电镜(SEM)可以看出,磷钼酸的质量分数为29.4%时,复合纤维的直径最小。紫外测试表明,将磷钼酸固载于PVA复合纤维上比直接使用具有更高的光催化活性,磷钼酸质量分数为25.0%,甲基橙溶液p H=2时,甲基橙的脱色率最高。复合纤维膜热处理后在水中稳定性较好,易于回收并循环使用,循环使用10次,甲基橙的脱色率无明显变化。Phosphomolybdic acid(H3PMo12O40)/polyvinyl alcohol(PVA) composite fiber membrane was prepared by electrospinning.The photocatalytic degradation of methyl orange simulated wastewater by the composite fiber membrane was investigated.FT-IR spectra showed that the Keggin structure of H3PMo12O40 still remained in the membrane.The minimum diameter of the composite fiber was observed as the H3PMo12O40 mass fraction of 29.4% by scanning electron microscopy(SEM).Analytical results from UV adsorption spectra indicated that the composites exhibited more excellent photocatalytic activity than that of H3PMo12O40.The highest decolorization rate of methyl orange solution was received when H3PMo12O40 mass fraction was 25% at p H 2.Composite fiber membrane after heat treatment was insoluble,easy recoverable and recycling.After reuse 10 times,the decolorization rate of methyl orange had no obvious change.

关 键 词：磷钼酸 静电纺丝 复合纤维膜 光降解 甲基橙 

分 类 号：X788[环境科学与工程—环境工程]