Ag3PO4纳米复合光催化剂的制备及表征.pdf

《Ag3PO4纳米复合光催化剂的制备及表征.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、物理化学学~E(WuliHuaxueXuebao)OctoberActaP．一Chim．Sin．2014，30(10)，1909—19151909[Article】doi：10．3866／PKU．WHXB201408046www．whxb．pku．edu．cn可见光响应的Co3(PO4)2／Ag3PO4纳米复合光催化剂的制备及表征顾永琴王波顾修全赵宇龙强颖怀张双朱磊f中国矿业大学材料科学与工程学院，江苏徐卅I221116)摘要：采用简单的化学偏聚法合成出Ag。PO纳米颗粒、磷酸钴(Co。(PO)z，CoP)纳米片以及它们两者的纳米复合结构(CoP／Ag。PO)，同时还比较了它们的可见光催化活性

2、．采用场发射扫描电镜(FESEM)、X射线衍射fXRD)、紫外．可见(uv-vis)吸收光谱以及光致发光谱等手段对其形貌、结构、光学以及可见光催化性能等进行表征．结果表明，CoP／Ag。PO复合纳米结构的可见光降解甲基橙(MO)的速率和循环稳定性均明显优于其它两种物质．这表明CoP应该起着共催化剂的作用，它能够抑制光生电子与空穴之间的复合，并且提供大量高活性的光生空穴．此外，我们还发现CoP／Ag。PO降解另一种阳离子型染料——罗丹明B(RhB)的能力则远不如纯Ag。PO，这可能是与光催化剂的表面性质发生改变有关，造成更低的RhB吸附能力．本文提供了一种廉价制备高效可见光催化剂的新方法．关键词

3、：Ag。PO：Co。(PO)：：可见光催化：甲基橙：罗丹明B中图分类号：0649PreparationandCharacterizationofCo3(PO,)2／Ag3PO,NanocompositesforVisible-LightPhotocataIysisGUYong-QinWANGBoGUXiu·QuanZHAOYu-LongQIANGYing-HuaiZHANGShuangZHULei(SchoolofMaterialsScienceandEngineering,ChinaUniversityofMiningandTechnology,Xuzhou221116JiangsuProv

4、ince，PR．China)Abstract：Inthisstudy,Ag3POnanoparticles(NPs)，cobaltphosphate(Co3(PO4)2，CoP)nanosheets(NSs)，andtheircomposites(CoP／Ag3PO4)weresynthesizedviaafacilechemicaIprecipitationmethod．Theirvisible—lightphotocatalyticactivitieswerecomparedandinvestigated．Thestructural，morphological，optical，andvis

5、ible—lightphotocatalyticpropertiesofthepreparedsampleswerecharacterizedbyX—raydifraction(XRD)，field—emissionscanningelectronmicroscopy(FESEM)，ultraviolet—visible(UV-Vis)di仟useabsorbanceandphotoluminescence(PL)spectroscopies．WefoundthatboththedegradationrateandcyrclicalstabilityoftheCoP／Ag3PO4hybrids

6、increasedsignificantlyundervisible—lightirradiationwhenmethylorange(MO)wasusedasthetargetwithreferencetosingle—phaseAg3PO4NPsorCoPNSs．ThissuggeststhatCoPmightplayacocatalystrole，whichsuppressescarrierrecombinationandprovidesalargenumberofphotogeneratedholes．Additionally,wealsoobservedthattheCoP／Ag3P

7、o4hybridshardlydegradedRhodamineB(RhB)，acationicdye．ThisbehaviormightbeattributedtotheIoweramountofdyemoleculeabsorptionbecauseofachangeinsurfacepolarity．Wethuspresentanewapproachforthedevelopmentoflo