半导体氧化物的掺杂及其抗菌性能研究

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1、西南交通大学硕士学位论文半导体氧化物的掺杂及其抗菌性能研究姓名：刘国梅申请学位级别：硕士专业：材料学指导教师：周祚万20060601西南交通大学硕士研究生学位论文第

2、I页900℃焙烧2h的四针状氧化锌中无含银相存在，银可能完全进入氧化锌的晶格，从而导致纤锌矿相的晶格参数增大。通过对掺银T_znO样品在自然光条件下抗菌效果研究，发现银的掺杂可以大大提高四针状氧化锌的抗菌性能，其对金黄色葡萄球菌和大肠杆菌的MIC值均由250m∥mL下降到125mg／mL以下。关键词：纳米二氧化钛：四针状氧化锌晶须；掺杂：抗菌西南交通大学硕士研究生学位论文第l

3、I页ABSTRACTInthispape

4、r，researchprogressesontheinorganicantimicrobialmaterialshavebeenco叫)aredaIldreViewed．111enano-sizedTi02wasdopedwimV，Mna11dZn，respectiVely’bysolid—solutionprocess，andthetetra-pod1ikezincoxidewhiskef(T_ZnO)was“sodopedwitllsilverbysolid—solutionmethod．Thea矗bctsofdopingontbecrystalst兀lctureand髓ti

5、microbialeffcctsofthesampleswereinvestigatedbyTI!M，XRD，STM，Uv．visspectraandMICtests．Thenano-sizedTi02wasdopedwithV，Mn，zn，andco-dopingofVandAgbysolid-solutionprocess．TheantimicrobialactivitiesofthesampleswereevaluatedbytestofMICValuesfo“ypicalmicrobessuchas豇砌P，f幽胁co，fand·殳t驴，咖c口cc甜占口l盯曾lfJunde

6、rnanlralnightcondition，andtheinnuencesofdopingonthesn?ucnlreandopticalbehaViourswerediscussed．TheresultsindicatedthatdopantofVanadium，manganeseandzincwithlat．％couldbe10adedinmeoctahedrallatticeofTi02，andnosecondphasefbmed．Obviousred-shiftwasobservedintheUv-visrenectionspectrainVaIladi啪dopedTi

7、02nallopanicles，锄dvaIladi啪dopingwashelp如ltoenhancethealltibacterialactivityofTi02，whilethere、VasnoobViouse妇fcctformagnesiumorzincdoping．Thea11tibacterialactiVityofnallo—sizedTi02co-dopedwimsilveralldvanadi啪hasbeenenhallceddjstinctively，muchbetlerthallmoseOfthes锄p】esdopedwiths01eelemem．Further

8、investigationshowedthatthehi曲曲tllesilverloadedinmeco—dopedTi02，thebettere任bctfortheantimicrobesbehaves．ThesilVerdoped’r-ZnOsampleswerealsopreparedbysolid-sOlutionprocessat900℃．Theinfluencesofdopingonthemorphology，thecrystallinestructure，theopticalpropertiesandtheantimicrobiale任色ctswerestudied

9、by西南交通大学硕士研究生学位论文第1V页XRD，SEMandMICeValuation．TheresultsdemonstratedthatsilVercouldnotentirelyIoadintothelatticeof、VurzitephaseofZn0whenthedopingconcentrationofsilVerwas1at．％，andtheremi曲texistsecondphaseofsilVer(simplesubstrance)inthes哪ples．It