ZnO纳米片的可控制备、形成机理及光催化性能的中期报告.docx

ZnO纳米片的可控制备、形成机理及光催化性能的中期报告
摘要：
本文报道了ZnO纳米片的可控制备方法，分析了形成机理，并研究了其光催化性能。通过水热法和溶胶凝胶法制备了不同形态的ZnO纳米片，并使用X射线衍射、扫描电子显微镜、透射电子显微镜等技术对其形貌和结构进行了表征。结果显示，水热法制备的ZnO纳米片形态较为规则，具有六边形、菱形等多种形状，晶体结构为纯ZnO相；溶胶凝胶法制备的ZnO纳米片形态较为不规则，具有呈片状和花瓣状等多种形态，晶体结构为ZnO和Zn(OH)2混合相。分析了两种方法制备ZnO纳米片形态差异和晶体结构的差异原因，认为是制备条件的差异导致的。进一步评价了两种ZnO纳米片在RhB的光催化降解中的性能，发现水热法制备的ZnO纳米片具有较高的光催化活性。
关键词：ZnO纳米片；可控制备；水热法；溶胶凝胶法；光催化性能
Abstract:
ThispaperreportsacontrollablepreparationmethodofZnOnanosheets,analyzesitsformationmechanism,andstudiesitsphotocatalyticproperties.ZnOnanosheetswithdifferentshapeswerepreparedbyhydrothermalandsol-gelmethods,andtheirmorphologyandstructurewerecharacterizedbyX-raydiffraction,scanningelectronmicroscopy,andtransmissionelectronmicroscopy.TheresultsshowedthatZnOnanosheetspreparedbyhydrothermalmethodhadrelativelyregularshapes,suchashexagonalandrhombicshapes,andapureZnOphase;thosepreparedbysol-gelmethodhadirregularshapes,suchassheet-likeandpetal-like,andamixedphaseofZnOandZn(OH)2.ThereasonsforthedifferenceintheshapeandcrystalstructureofZnOnanosheetspreparedbythetwomethodswereanalyzed,whichwereattributedtothedifferenceinpreparationconditions.Furthermore,thephotocatalyticperformanceofthetwoZnOnanosheetsinRhBdegradationwasevaluated,anditwasfoundthatZnOnanosheetspreparedbyhydrothermalmethodhadhigherphotocatalyticactivity.
Keywords:ZnOnanosheets;controllablepreparation;hydrothermalmethod;sol-gelmethod;photocatalyticperformance