本文主要研究内容
作者戚露露(2019)在《红磷基复合光催化材料的制备及性能研究》一文中研究指出:能源短缺和环境污染已成为全球面临的两大挑战。光催化技术在解决能源短缺和环境污染方面具有潜在的应用前景,开发新型、高效可见光响应的光催化材料是光催化领域研究的热点。本文以纳米红磷(Red Phosphorus,RP)为研究对象,首先通过溶剂热法和高温退火过程获得三维纳米红磷(Three-dimensional RP),随后利用红磷自身优异的吸附和还原性能,采用原位沉积法、原位溶剂热法制备出金属M0(Au,Cu)/RP异质结和Ni2P/RP异质结,并将二者应用于光催化分解水制氢。具体研究结果如下:(1)采用溶剂热法和高温煅烧法获得纳米红磷。所得产物具有三维层状多孔结构,比表面积可达54.24 m2/g,吸收边带大约在693 nm,禁带宽度约为1.79 eV。红磷纳米化后具有明显的量子尺寸效应,导致其紫外吸收光谱发生蓝移。首次发现纳米红磷可在黑暗条件下静态吸附清除亚甲基蓝(MB)和罗丹明B(RhB)。同时发现红磷在光照条件下可将Cr6+几乎完全还原为Cr3+,表现出优异的光催化还原性能。此外,对比了不同牺牲剂下红磷光催化分解水制氢性能,在可见光的照射下,以三乙醇胺(TEOA)为牺牲剂时,红磷的平均产氢速率可达81.62μmol.g-1.h-1;以Na2S/Na2SO3牺牲剂时,红磷的平均产氢速率可达294.76μmol.g-1.h-1。(2)通过原位沉积法制备了Au/RP,原位溶剂热法制备了Cu/RP复合物。金属纳米颗粒均匀的生长在红磷的表面,尺寸大约在4-6 nm之间,Au纳米粒子(Au NPs)和Cu纳米粒子(Cu NPs)的局域表面等离子共振效应(LSPR)使得样品的光吸收和光电流显著增强。光催化分解水产氢实验表明:相比于单体RP,Au/RP和Cu/RP的光催化产氢速率分别提高2.32倍和2.77倍。(3)采用原位醇热法制备了Ni2P/RP二维异质结,通过调整前驱体NiCl2·6H2O的原始加入量,得到不同Ni2P负载量的Ni2P/RP异质结,二者形成良好的接触界面。在可见光的照射下,Na2S/Na2SO3作为牺牲剂时,Ni2P/RP-5的光解水制氢的速率可达到2183μmol·g-1·h-1,是RP(294.76μmol·g-1·h-1)的7.41倍。TEOA作为为牺牲剂时,3.5 wt%Ni2P/RP的光解水制氢的速率可达到240.93μmol·g-1·h-1,是Pt/RP(81.63μmol·g-1·h-1)的2.95倍。同时发现RP表面的边缘是光催化反应的活性位点,而Ni2P的引入能够为红磷表面增加更多的活性位点,促进电子和空穴的分离,从而证明Ni2P的助催化产氢性能比贵金属铂更优。
Abstract
neng yuan duan que he huan jing wu ran yi cheng wei quan qiu mian lin de liang da tiao zhan 。guang cui hua ji shu zai jie jue neng yuan duan que he huan jing wu ran fang mian ju you qian zai de ying yong qian jing ,kai fa xin xing 、gao xiao ke jian guang xiang ying de guang cui hua cai liao shi guang cui hua ling yu yan jiu de re dian 。ben wen yi na mi gong lin (Red Phosphorus,RP)wei yan jiu dui xiang ,shou xian tong guo rong ji re fa he gao wen tui huo guo cheng huo de san wei na mi gong lin (Three-dimensional RP),sui hou li yong gong lin zi shen you yi de xi fu he hai yuan xing neng ,cai yong yuan wei chen ji fa 、yuan wei rong ji re fa zhi bei chu jin shu M0(Au,Cu)/RPyi zhi jie he Ni2P/RPyi zhi jie ,bing jiang er zhe ying yong yu guang cui hua fen jie shui zhi qing 。ju ti yan jiu jie guo ru xia :(1)cai yong rong ji re fa he gao wen duan shao fa huo de na mi gong lin 。suo de chan wu ju you san wei ceng zhuang duo kong jie gou ,bi biao mian ji ke da 54.24 m2/g,xi shou bian dai da yao zai 693 nm,jin dai kuan du yao wei 1.79 eV。gong lin na mi hua hou ju you ming xian de liang zi che cun xiao ying ,dao zhi ji zi wai xi shou guang pu fa sheng lan yi 。shou ci fa xian na mi gong lin ke zai hei an tiao jian xia jing tai xi fu qing chu ya jia ji lan (MB)he luo dan ming B(RhB)。tong shi fa xian gong lin zai guang zhao tiao jian xia ke jiang Cr6+ji hu wan quan hai yuan wei Cr3+,biao xian chu you yi de guang cui hua hai yuan xing neng 。ci wai ,dui bi le bu tong xi sheng ji xia gong lin guang cui hua fen jie shui zhi qing xing neng ,zai ke jian guang de zhao she xia ,yi san yi chun an (TEOA)wei xi sheng ji shi ,gong lin de ping jun chan qing su lv ke da 81.62μmol.g-1.h-1;yi Na2S/Na2SO3xi sheng ji shi ,gong lin de ping jun chan qing su lv ke da 294.76μmol.g-1.h-1。(2)tong guo yuan wei chen ji fa zhi bei le Au/RP,yuan wei rong ji re fa zhi bei le Cu/RPfu ge wu 。jin shu na mi ke li jun yun de sheng chang zai gong lin de biao mian ,che cun da yao zai 4-6 nmzhi jian ,Auna mi li zi (Au NPs)he Cuna mi li zi (Cu NPs)de ju yu biao mian deng li zi gong zhen xiao ying (LSPR)shi de yang pin de guang xi shou he guang dian liu xian zhe zeng jiang 。guang cui hua fen jie shui chan qing shi yan biao ming :xiang bi yu chan ti RP,Au/RPhe Cu/RPde guang cui hua chan qing su lv fen bie di gao 2.32bei he 2.77bei 。(3)cai yong yuan wei chun re fa zhi bei le Ni2P/RPer wei yi zhi jie ,tong guo diao zheng qian qu ti NiCl2·6H2Ode yuan shi jia ru liang ,de dao bu tong Ni2Pfu zai liang de Ni2P/RPyi zhi jie ,er zhe xing cheng liang hao de jie chu jie mian 。zai ke jian guang de zhao she xia ,Na2S/Na2SO3zuo wei xi sheng ji shi ,Ni2P/RP-5de guang jie shui zhi qing de su lv ke da dao 2183μmol·g-1·h-1,shi RP(294.76μmol·g-1·h-1)de 7.41bei 。TEOAzuo wei wei xi sheng ji shi ,3.5 wt%Ni2P/RPde guang jie shui zhi qing de su lv ke da dao 240.93μmol·g-1·h-1,shi Pt/RP(81.63μmol·g-1·h-1)de 2.95bei 。tong shi fa xian RPbiao mian de bian yuan shi guang cui hua fan ying de huo xing wei dian ,er Ni2Pde yin ru neng gou wei gong lin biao mian zeng jia geng duo de huo xing wei dian ,cu jin dian zi he kong xue de fen li ,cong er zheng ming Ni2Pde zhu cui hua chan qing xing neng bi gui jin shu bo geng you 。
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论文详细介绍
论文作者分别是来自西北大学的戚露露,发表于刊物西北大学2019-10-08论文,是一篇关于红磷论文,助催化剂论文,异质结论文,光催化论文,分解水制氢论文,西北大学2019-10-08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,资料来自西北大学2019-10-08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。