本文主要研究内容
作者刘森,赵梦雨,和泽田,钟义,丁浩,陈代梅(2019)在《增强可见光光电催化活性的二维BiOI纳米片/一维BiPO4纳米棒p-n异质结复合电极的制备(英文)》一文中研究指出:光电催化是一种新型催化技术,在去除水中有机物方面具有独特的优势.在光电协同作用下具有较高的量子效率,电子-空缺负荷率低,稳定性好等优势.BiPO4具有较宽的禁带宽度,只能响应有限的紫外光区域,极大限制了其光电催化效率.因此,本文在电化学三电极体系下,通过简单的两步电沉积法将BiPO4纳米棒/Bi OI纳米片复合薄膜沉积固定在FTO玻璃上,制备了BiPO4/BiOI/FTO复合光电极材料.通过场发射扫描电镜,透射电子电镜, X射线光单子能谱、紫外可见漫反射光谱以及电化学测试对其组成、晶体形貌结构和光学性质进行表征.考察了外加工作电压、碘氧铋电极沉积时间等因素对四环素去除效果的影响.结果表明, BiOI纳米片生长在BiPO4纳米棒上,形成了异质结结构, BiPO4/BiOI/FTO复合薄膜电极具有良好的光吸收性能和优异的电荷转移特性.当碘氧铋沉积时间为150 s,外加偏压为1.2 V时,复合薄膜电极具有最佳的四环素去除效率, 4 h达到80%.在相同的实验条件下, BiPO4/BiOI/FTO复合薄膜电极对四环素的去除效率分别是Bi PO4/FTO电极和BiOI/FTO电极的1.6倍和1.4倍.在光电协同作用下, BiPO4/BiOI/FTO复合光电极对污染物的去除效率是单纯光催化和电催化对污染物去除效率的2.8倍和2.5倍.同时该复合光电极具有好的稳定性,经过四次16 h的循环实验,光电极对四环素的去除效果基本保持不变.根据一系列表征结果和p-n异质结形成的方式,推测了p-n异质结的结构和反应过程.在光激发作用下, BiOI导带上的光生电子有效的转移到Bi PO4导带上,然后在外加偏压的作用下通过外电路转移到铂丝电极上,光生电子与氧气反应生产超氧自由基降解有机污染物.另一方面,光生空穴从Bi PO4价带上转移到Bi OI价带上,与水反应生产羟基自由基,作为光电催化反应过程中的主要活性物种.总之,增强的光电催化活性Bi OI/BiPO4异质结构可能主要归因于p-n异质结结构改善催化剂的光吸收能力和有效的电子-空穴转移过程.
Abstract
guang dian cui hua shi yi chong xin xing cui hua ji shu ,zai qu chu shui zhong you ji wu fang mian ju you du te de you shi .zai guang dian xie tong zuo yong xia ju you jiao gao de liang zi xiao lv ,dian zi -kong que fu he lv di ,wen ding xing hao deng you shi .BiPO4ju you jiao kuan de jin dai kuan du ,zhi neng xiang ying you xian de zi wai guang ou yu ,ji da xian zhi le ji guang dian cui hua xiao lv .yin ci ,ben wen zai dian hua xue san dian ji ti ji xia ,tong guo jian chan de liang bu dian chen ji fa jiang BiPO4na mi bang /Bi OIna mi pian fu ge bao mo chen ji gu ding zai FTObo li shang ,zhi bei le BiPO4/BiOI/FTOfu ge guang dian ji cai liao .tong guo chang fa she sao miao dian jing ,tou she dian zi dian jing , Xshe xian guang chan zi neng pu 、zi wai ke jian man fan she guang pu yi ji dian hua xue ce shi dui ji zu cheng 、jing ti xing mao jie gou he guang xue xing zhi jin hang biao zheng .kao cha le wai jia gong zuo dian ya 、dian yang bi dian ji chen ji shi jian deng yin su dui si huan su qu chu xiao guo de ying xiang .jie guo biao ming , BiOIna mi pian sheng chang zai BiPO4na mi bang shang ,xing cheng le yi zhi jie jie gou , BiPO4/BiOI/FTOfu ge bao mo dian ji ju you liang hao de guang xi shou xing neng he you yi de dian he zhuai yi te xing .dang dian yang bi chen ji shi jian wei 150 s,wai jia pian ya wei 1.2 Vshi ,fu ge bao mo dian ji ju you zui jia de si huan su qu chu xiao lv , 4 hda dao 80%.zai xiang tong de shi yan tiao jian xia , BiPO4/BiOI/FTOfu ge bao mo dian ji dui si huan su de qu chu xiao lv fen bie shi Bi PO4/FTOdian ji he BiOI/FTOdian ji de 1.6bei he 1.4bei .zai guang dian xie tong zuo yong xia , BiPO4/BiOI/FTOfu ge guang dian ji dui wu ran wu de qu chu xiao lv shi chan chun guang cui hua he dian cui hua dui wu ran wu qu chu xiao lv de 2.8bei he 2.5bei .tong shi gai fu ge guang dian ji ju you hao de wen ding xing ,jing guo si ci 16 hde xun huan shi yan ,guang dian ji dui si huan su de qu chu xiao guo ji ben bao chi bu bian .gen ju yi ji lie biao zheng jie guo he p-nyi zhi jie xing cheng de fang shi ,tui ce le p-nyi zhi jie de jie gou he fan ying guo cheng .zai guang ji fa zuo yong xia , BiOIdao dai shang de guang sheng dian zi you xiao de zhuai yi dao Bi PO4dao dai shang ,ran hou zai wai jia pian ya de zuo yong xia tong guo wai dian lu zhuai yi dao bo si dian ji shang ,guang sheng dian zi yu yang qi fan ying sheng chan chao yang zi you ji jiang jie you ji wu ran wu .ling yi fang mian ,guang sheng kong xue cong Bi PO4jia dai shang zhuai yi dao Bi OIjia dai shang ,yu shui fan ying sheng chan qiang ji zi you ji ,zuo wei guang dian cui hua fan ying guo cheng zhong de zhu yao huo xing wu chong .zong zhi ,zeng jiang de guang dian cui hua huo xing Bi OI/BiPO4yi zhi jie gou ke neng zhu yao gui yin yu p-nyi zhi jie jie gou gai shan cui hua ji de guang xi shou neng li he you xiao de dian zi -kong xue zhuai yi guo cheng .
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论文作者分别是来自催化学报的刘森,赵梦雨,和泽田,钟义,丁浩,陈代梅,发表于刊物催化学报2019年03期论文,是一篇关于电沉积论文,光电催化论文,四环素论文,催化学报2019年03期论文的文章。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,资料来自催化学报2019年03期论文网站,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:电沉积论文; 光电催化论文; 四环素论文; 催化学报2019年03期论文;