本文主要研究内容
作者甘俊珍（2019）在《纳米SnO2的光催化性能和气相吸/脱附性能的粒度和形貌依赖性》一文中研究指出：与块状材料相比,纳米材料具有优异的光催化性能和吸/脱附性能,现在已广泛的应用在诸多领域,而这些性能均受粒度和形貌的影响。但目前粒度和形貌对光催化性能的影响以及光催化性能的粒度依赖性与吸附性能的粒度依赖性之间的关系还不清楚;粒度和形貌对气相脱附动力学和吸/脱附量的影响规律和机理还未见报道。本文以纳米SnO2为研究体系,制备出不同粒度形貌规则的球形和八面体纳米SnO2,并研究了粒度和形貌对光催化性能和气相吸/脱附性能的影响规律和影响机理。在制备方面,采用水热法,通过改变不同实验条件得到其对粒度和形貌的影响规律。在纳米SnO2的光催化性能方面,首先研究了纳米SnO2对不同染料的光催化选择性以及选择性的机理,其次选择了光催化性能较好的孔雀石绿为光催化对象,进而研究了不同粒度球形和八面体纳米SnO2对孔雀石绿的光催化性能,以及光催化性能的粒度依赖性与吸附性能的粒度依赖性之间的关系。在纳米SnO2的气相吸/脱附方面,测定了不同吸附温度不同粒度球形纳米SnO2对NH3的总吸附量,得到了温度和粒度对总吸附量的影响规律。采用程序升温脱附法（TPD）测定了NH3在不同粒度球形和八面体纳米SnO2表面的脱附曲线,然后根据脱附方程,进而得到脱附动力学参数（脱附活化能Ea和脱附指前因子的对数lnA）,讨论了粒度和形貌对Ea和lnA的影响规律;此外,根据脱附峰的范围和面积得到不同粒度球形和八面体纳米SnO2表面酸性位的强度和量,讨论了脱附动力学参数的粒度依赖性与表面酸性位的粒度依赖性之间的关系,从而解释了粒度和形貌对脱附动力学参数的影响机理。结果表明:（1）在纳米SnO2的制备方面:球形纳米SnO2的制备采用了两种制备方案,随着水热温度的增大,两种方案制备的球形纳米SnO2的粒径均增大。此外,对于粒径大于20 nm的球形纳米SnO2,随着水热时间的增大,粒径逐渐增大且形貌越规则,随着草酸和PVP-K30质量的增加,粒径逐渐减小;对于粒径小于20 nm的球形纳米SnO2,随着Sn4+浓度的增加,粒径逐渐增大。对于八面体纳米SnO2的制备,HCl的体积、水和乙醇的体积是影响粒径和形貌的主要因素,随着HCl、水和乙醇体积的增大,粒径减小。依据这些规律可实现对不同粒度形貌规则的球形和八面体纳米SnO2的可控合成。（2）在粒度和形貌对光催化性能的影响方面:球形纳米SnO2的光催化选择性与其吸附选择性相一致。球形纳米SnO2不吸附阴离子染料甲基橙和刚果红,对这两种染料也没有光催化效果;但对于阳离子染料盐基品红和孔雀石绿,纳米SnO2对孔雀石绿的吸附速率常数、吸附率、光催化速率常数和降解率都大于对盐基品红的。此外,球形和八面体纳米SnO2对孔雀石绿的光催化性能随粒度的减小而增强;当八面体和球形SnO2的等效粒径相等时,八面体纳米SnO2对孔雀石绿光催化的降解率和降解速率都比球形纳米SnO2对孔雀石绿光催化的降解率和降解速率大。粒度越小,形貌效应的影响越明显。因此,粒度和形貌对纳米SnO2的光催化效果都有显著的影响。（3）在粒度和形貌对气相吸/脱附性能的影响方面:球形纳米SnO2对NH3的总吸附量受吸附温度和粒径的影响。随着吸附温度和粒径的减小,总吸附量增大。此外,粒度和形貌对脱附活化能（Ea）和脱附指前因子的对数（lnA）影响归因于粒度和形貌对表面酸性位强度和量的影响。随着粒度的减小,球形和八面体纳米SnO2表面酸性位的强度越强、酸性位的量越多,这导致纳米SnO2对碱性气体NH3的吸附作用增强,同时可以提供更多的吸附活性位点,因此,Ea、lnA和化学吸附/脱附量均增大。对于形貌的影响:等效粒径相同的球形和八面体,八面体纳米SnO2表面的酸性位的强度比球形纳米SnO2表面酸性位的强度强,且酸性位量多,因此,Ea八面体>Ea球形,lnA八面体>lnA球形。本论文得到的关于纳米SnO2制备的规律可以为不同形貌和不同粒度纳米SnO2的制备提供指导;粒度和形貌对光催化性能的影响规律可以为纳米SnO2及其它光催化剂的吸附和光催化提供重要参考;粒度和形貌对气相吸/脱附的影响规律对于涉及到纳米SnO2吸附、催化和脱附过程的研究和应用提供指导和参考。
Abstract
yu kuai zhuang cai liao xiang bi ,na mi cai liao ju you you yi de guang cui hua xing neng he xi /tuo fu xing neng ,xian zai yi an fan de ying yong zai zhu duo ling yu ,er zhe xie xing neng jun shou li du he xing mao de ying xiang 。dan mu qian li du he xing mao dui guang cui hua xing neng de ying xiang yi ji guang cui hua xing neng de li du yi lai xing yu xi fu xing neng de li du yi lai xing zhi jian de guan ji hai bu qing chu ;li du he xing mao dui qi xiang tuo fu dong li xue he xi /tuo fu liang de ying xiang gui lv he ji li hai wei jian bao dao 。ben wen yi na mi SnO2wei yan jiu ti ji ,zhi bei chu bu tong li du xing mao gui ze de qiu xing he ba mian ti na mi SnO2,bing yan jiu le li du he xing mao dui guang cui hua xing neng he qi xiang xi /tuo fu xing neng de ying xiang gui lv he ying xiang ji li 。zai zhi bei fang mian ,cai yong shui re fa ,tong guo gai bian bu tong shi yan tiao jian de dao ji dui li du he xing mao de ying xiang gui lv 。zai na mi SnO2de guang cui hua xing neng fang mian ,shou xian yan jiu le na mi SnO2dui bu tong ran liao de guang cui hua shua ze xing yi ji shua ze xing de ji li ,ji ci shua ze le guang cui hua xing neng jiao hao de kong qiao dan lu wei guang cui hua dui xiang ,jin er yan jiu le bu tong li du qiu xing he ba mian ti na mi SnO2dui kong qiao dan lu de guang cui hua xing neng ,yi ji guang cui hua xing neng de li du yi lai xing yu xi fu xing neng de li du yi lai xing zhi jian de guan ji 。zai na mi SnO2de qi xiang xi /tuo fu fang mian ,ce ding le bu tong xi fu wen du bu tong li du qiu xing na mi SnO2dui NH3de zong xi fu liang ,de dao le wen du he li du dui zong xi fu liang de ying xiang gui lv 。cai yong cheng xu sheng wen tuo fu fa （TPD）ce ding le NH3zai bu tong li du qiu xing he ba mian ti na mi SnO2biao mian de tuo fu qu xian ,ran hou gen ju tuo fu fang cheng ,jin er de dao tuo fu dong li xue can shu （tuo fu huo hua neng Eahe tuo fu zhi qian yin zi de dui shu lnA）,tao lun le li du he xing mao dui Eahe lnAde ying xiang gui lv ;ci wai ,gen ju tuo fu feng de fan wei he mian ji de dao bu tong li du qiu xing he ba mian ti na mi SnO2biao mian suan xing wei de jiang du he liang ,tao lun le tuo fu dong li xue can shu de li du yi lai xing yu biao mian suan xing wei de li du yi lai xing zhi jian de guan ji ,cong er jie shi le li du he xing mao dui tuo fu dong li xue can shu de ying xiang ji li 。jie guo biao ming :（1）zai na mi SnO2de zhi bei fang mian :qiu xing na mi SnO2de zhi bei cai yong le liang chong zhi bei fang an ,sui zhao shui re wen du de zeng da ,liang chong fang an zhi bei de qiu xing na mi SnO2de li jing jun zeng da 。ci wai ,dui yu li jing da yu 20 nmde qiu xing na mi SnO2,sui zhao shui re shi jian de zeng da ,li jing zhu jian zeng da ju xing mao yue gui ze ,sui zhao cao suan he PVP-K30zhi liang de zeng jia ,li jing zhu jian jian xiao ;dui yu li jing xiao yu 20 nmde qiu xing na mi SnO2,sui zhao Sn4+nong du de zeng jia ,li jing zhu jian zeng da 。dui yu ba mian ti na mi SnO2de zhi bei ,HClde ti ji 、shui he yi chun de ti ji shi ying xiang li jing he xing mao de zhu yao yin su ,sui zhao HCl、shui he yi chun ti ji de zeng da ,li jing jian xiao 。yi ju zhe xie gui lv ke shi xian dui bu tong li du xing mao gui ze de qiu xing he ba mian ti na mi SnO2de ke kong ge cheng 。（2）zai li du he xing mao dui guang cui hua xing neng de ying xiang fang mian :qiu xing na mi SnO2de guang cui hua shua ze xing yu ji xi fu shua ze xing xiang yi zhi 。qiu xing na mi SnO2bu xi fu yin li zi ran liao jia ji cheng he gang guo gong ,dui zhe liang chong ran liao ye mei you guang cui hua xiao guo ;dan dui yu yang li zi ran liao yan ji pin gong he kong qiao dan lu ,na mi SnO2dui kong qiao dan lu de xi fu su lv chang shu 、xi fu lv 、guang cui hua su lv chang shu he jiang jie lv dou da yu dui yan ji pin gong de 。ci wai ,qiu xing he ba mian ti na mi SnO2dui kong qiao dan lu de guang cui hua xing neng sui li du de jian xiao er zeng jiang ;dang ba mian ti he qiu xing SnO2de deng xiao li jing xiang deng shi ,ba mian ti na mi SnO2dui kong qiao dan lu guang cui hua de jiang jie lv he jiang jie su lv dou bi qiu xing na mi SnO2dui kong qiao dan lu guang cui hua de jiang jie lv he jiang jie su lv da 。li du yue xiao ,xing mao xiao ying de ying xiang yue ming xian 。yin ci ,li du he xing mao dui na mi SnO2de guang cui hua xiao guo dou you xian zhe de ying xiang 。（3）zai li du he xing mao dui qi xiang xi /tuo fu xing neng de ying xiang fang mian :qiu xing na mi SnO2dui NH3de zong xi fu liang shou xi fu wen du he li jing de ying xiang 。sui zhao xi fu wen du he li jing de jian xiao ,zong xi fu liang zeng da 。ci wai ,li du he xing mao dui tuo fu huo hua neng （Ea）he tuo fu zhi qian yin zi de dui shu （lnA）ying xiang gui yin yu li du he xing mao dui biao mian suan xing wei jiang du he liang de ying xiang 。sui zhao li du de jian xiao ,qiu xing he ba mian ti na mi SnO2biao mian suan xing wei de jiang du yue jiang 、suan xing wei de liang yue duo ,zhe dao zhi na mi SnO2dui jian xing qi ti NH3de xi fu zuo yong zeng jiang ,tong shi ke yi di gong geng duo de xi fu huo xing wei dian ,yin ci ,Ea、lnAhe hua xue xi fu /tuo fu liang jun zeng da 。dui yu xing mao de ying xiang :deng xiao li jing xiang tong de qiu xing he ba mian ti ,ba mian ti na mi SnO2biao mian de suan xing wei de jiang du bi qiu xing na mi SnO2biao mian suan xing wei de jiang du jiang ,ju suan xing wei liang duo ,yin ci ,Eaba mian ti >Eaqiu xing ,lnAba mian ti >lnAqiu xing 。ben lun wen de dao de guan yu na mi SnO2zhi bei de gui lv ke yi wei bu tong xing mao he bu tong li du na mi SnO2de zhi bei di gong zhi dao ;li du he xing mao dui guang cui hua xing neng de ying xiang gui lv ke yi wei na mi SnO2ji ji ta guang cui hua ji de xi fu he guang cui hua di gong chong yao can kao ;li du he xing mao dui qi xiang xi /tuo fu de ying xiang gui lv dui yu she ji dao na mi SnO2xi fu 、cui hua he tuo fu guo cheng de yan jiu he ying yong di gong zhi dao he can kao 。
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论文作者分别是来自太原理工大学的甘俊珍，发表于刊物太原理工大学2019-07-26论文，是一篇关于纳米二氧化锡论文,制备论文,粒度效应论文,形貌效应论文,光催化论文,气相吸论文,脱附论文,太原理工大学2019-07-26论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自太原理工大学2019-07-26论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：纳米二氧化锡论文; 制备论文; 粒度效应论文; 形貌效应论文; 光催化论文; 气相吸论文; 脱附论文; 太原理工大学2019-07-26论文;