本文主要研究内容
作者李振路(2019)在《磁性AgBr复合材料的制备及其光催化活性研究》一文中研究指出:利用液相合成法设计合成了三种新型磁性复合材料(AgBr/Cu/CuFe2O4,CoFe2O4/AgBr和Ag/AgBr/NiFe2O4)。通过XRD,TEM,XPS,UV–vis等多种手段对所得材料进行表征,并以有机染料为催化底物,评价其光催化活性及活性增强机制。得出以下主要结论:溶剂热法合成Cu/CuFe2O4,再通过沉积法制备AgBr/Cu/CuFe2O4复合光催化剂。可见光照射60 min后,AgBr/Cu/CuFe2O4对罗丹明B(RhB)的降解率高达95.2%,优于单一Cu/CuFe2O4和AgBr对RhB的去除率。复合材料增强的光催化活性在于材料中Cu0可作为电子介体,与AgBr和CuFe2O4构筑Z型光催化体系,一方面加速电子在界面间的传输速率,提升光生电荷的分离效率;另一方面可保留复合材料较高的氧化和还原能力,进而提高光催化活性。此外,AgBr/Cu/CuFe2O4光催化剂五次循环降解RhB的活性测试表明其易磁回收再利用。通过水热法合成CoFe2O4,再由沉积法将其与AgBr复合构筑具有不同组成的CoFe2O4/AgBr材料。可见光照射60 min后,20%CoFe2O4/AgBr对甲基橙(MO)的去除率可达95%,明显高于单一CoFe2O4,AgBr,5%CoFe2O4/AgBr和10%CoFe2O4/AgBr光催化剂。实验发现20%CoFe2O4/AgBr中AgBr和CoFe2O4两者接触良好,构成的Ⅱ型异质结更有效地提升光生电荷的分离效率,增强复合材料光催化活性。此外,20%CoFe2O4/AgBr易回收再重复利用。利用水热法结合溶剂热法制备磁性等离子体Ag/AgBr/NiFe2O4复合光催化剂。实验发现,相比单一NiFe2O4和Ag/AgBr,复合材料Ag/AgBr/NiFe2O4在可见光下对RhB的降解具备更高的光催化活性,其原因是Ag/AgBr/NiFe2O4中Ag0纳米颗粒的等离子体共振效应可增强复合催化剂对可见光的吸收;此外,AgBr和CoFe2O4构筑的Ⅱ型异质结可有效提升光生电荷的分离效率,进而增强光催化活性。可见光照射下对RhB的三次循环降解实验说明Ag/AgBr/NiFe2O4具有较高的稳定性。图47幅;表7个;参100篇。
Abstract
li yong ye xiang ge cheng fa she ji ge cheng le san chong xin xing ci xing fu ge cai liao (AgBr/Cu/CuFe2O4,CoFe2O4/AgBrhe Ag/AgBr/NiFe2O4)。tong guo XRD,TEM,XPS,UV–visdeng duo chong shou duan dui suo de cai liao jin hang biao zheng ,bing yi you ji ran liao wei cui hua de wu ,ping jia ji guang cui hua huo xing ji huo xing zeng jiang ji zhi 。de chu yi xia zhu yao jie lun :rong ji re fa ge cheng Cu/CuFe2O4,zai tong guo chen ji fa zhi bei AgBr/Cu/CuFe2O4fu ge guang cui hua ji 。ke jian guang zhao she 60 minhou ,AgBr/Cu/CuFe2O4dui luo dan ming B(RhB)de jiang jie lv gao da 95.2%,you yu chan yi Cu/CuFe2O4he AgBrdui RhBde qu chu lv 。fu ge cai liao zeng jiang de guang cui hua huo xing zai yu cai liao zhong Cu0ke zuo wei dian zi jie ti ,yu AgBrhe CuFe2O4gou zhu Zxing guang cui hua ti ji ,yi fang mian jia su dian zi zai jie mian jian de chuan shu su lv ,di sheng guang sheng dian he de fen li xiao lv ;ling yi fang mian ke bao liu fu ge cai liao jiao gao de yang hua he hai yuan neng li ,jin er di gao guang cui hua huo xing 。ci wai ,AgBr/Cu/CuFe2O4guang cui hua ji wu ci xun huan jiang jie RhBde huo xing ce shi biao ming ji yi ci hui shou zai li yong 。tong guo shui re fa ge cheng CoFe2O4,zai you chen ji fa jiang ji yu AgBrfu ge gou zhu ju you bu tong zu cheng de CoFe2O4/AgBrcai liao 。ke jian guang zhao she 60 minhou ,20%CoFe2O4/AgBrdui jia ji cheng (MO)de qu chu lv ke da 95%,ming xian gao yu chan yi CoFe2O4,AgBr,5%CoFe2O4/AgBrhe 10%CoFe2O4/AgBrguang cui hua ji 。shi yan fa xian 20%CoFe2O4/AgBrzhong AgBrhe CoFe2O4liang zhe jie chu liang hao ,gou cheng de Ⅱxing yi zhi jie geng you xiao de di sheng guang sheng dian he de fen li xiao lv ,zeng jiang fu ge cai liao guang cui hua huo xing 。ci wai ,20%CoFe2O4/AgBryi hui shou zai chong fu li yong 。li yong shui re fa jie ge rong ji re fa zhi bei ci xing deng li zi ti Ag/AgBr/NiFe2O4fu ge guang cui hua ji 。shi yan fa xian ,xiang bi chan yi NiFe2O4he Ag/AgBr,fu ge cai liao Ag/AgBr/NiFe2O4zai ke jian guang xia dui RhBde jiang jie ju bei geng gao de guang cui hua huo xing ,ji yuan yin shi Ag/AgBr/NiFe2O4zhong Ag0na mi ke li de deng li zi ti gong zhen xiao ying ke zeng jiang fu ge cui hua ji dui ke jian guang de xi shou ;ci wai ,AgBrhe CoFe2O4gou zhu de Ⅱxing yi zhi jie ke you xiao di sheng guang sheng dian he de fen li xiao lv ,jin er zeng jiang guang cui hua huo xing 。ke jian guang zhao she xia dui RhBde san ci xun huan jiang jie shi yan shui ming Ag/AgBr/NiFe2O4ju you jiao gao de wen ding xing 。tu 47fu ;biao 7ge ;can 100pian 。
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论文详细介绍
论文作者分别是来自华北理工大学的李振路,发表于刊物华北理工大学2019-10-21论文,是一篇关于磁性复合材料论文,可见光光催化论文,反应机理论文,循环利用论文,华北理工大学2019-10-21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,资料来自华北理工大学2019-10-21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:磁性复合材料论文; 可见光光催化论文; 反应机理论文; 循环利用论文; 华北理工大学2019-10-21论文;