膨胀石墨负载纳米二氧化钛光催化剂的制备、表征与其光催化性能.pdf

第36卷第3期 硅酸盐学报 V01．36，No．3 2008年3月 J()I瓜NAI．oF1啦CHINESECERAMlCSOC砸Ty March，2008 膨胀石墨负载纳米二氧化钛光催化剂的制备、表征与其光催化性能 黄绵峰，郑治祥，徐光青，吴玉程 (合肥工业大学材料科学与工程学院，合肥230009) 摘要：采用Ⅸ警嘲P25(P25)改性溶胶—凝胶法制备膨胀石墨(a【foliated 对其结构与光催化剂活性的影响。结果表明：前02以纳米颗粒的形式牢固负载在EG薄片表面。具有疏松多孔蠕虫状结构的EG为瓢02提供高浓度的 三维降解环境。当P25浓度为59／L时，与EG复合的材料经50012热处理3h后，对甲基橙溶液的降解效能最高。 关键词：二氧化钛；膨胀石墨；吸附；光降解 0643．3 中图分类号：TB33 文献标识码：A 文章编号：0454--5648(2007)12--0325--05 ANDPHOTOCATAIYTICACTr、，ITYoFEXFoLLU咂D PREPAjRATIoN’CHARACTEluZATIoN GRAPmTESUPPoRTEDTITANIUMDIoXIDEPHoToCAllAIYST HUANG Mianfeng，ZHENGZh反iang，XUGuangqing，WUYucheng ofMaterialsScienceand (School Engineering，HefeiUniversityofTechnology,Hefei230009，China) titanium was the Abstract：Graphite—supporteddio茹de(Ti02)photoeatalystpreparedby Degussa using the method．nestructurethe Wascharacterized electron and S01吨el of compositesamples byX-raydiffxaction,scanningmicroscope area．Theinfluenceof timesandconcenffationofP25inthe Brtmauer-Emmett-Teller(BET)surfacecalciningtemperature．coating modifiedsolonthe structureand alediseussed．Theresultsshowthat Was ontheflakesofexfoliated catalytic activity Ti02 deposited intheformof wornl．1ikeexfoliated athree—dimensionalenvironmentfor graphite(EG)hardlynanocrystallite．The graphiteprovided reaction．HeattreatmentofthematerialloadedonEGwas at500℃for3h．TheconcentrationofP25Was5 photocatalytic kept g／L． 111ematerialhasthebest Oilthe decolorationrate photocatalyticactivity degradation