本文主要研究内容
作者李子娟(2019)在《稀土掺杂氟化物及其复合材料制备与性能研究》一文中研究指出:本文首先采用热分解法在不同反应时间、不同反应温度及不同油酸的量实验条件下成功合成具有高品质(单分散、形貌均匀、尺寸均一)并且具备强的上转换发光的核心NaYF4:20%Yb3+,2%Er3+纳米粒子。通过XRD,SEM及光致发光表征得到,具有最强上转换发光核心NaYF4:20%Yb3+,2%Er3+纳米粒子的制备条件:反应时间为75min;反应温度为310℃;加入油酸的量为3mL。接着采用外延生长法合成了一系列掺杂不同浓度的核-活性壳NaGdF4:20%Yb3+,2%Er3+@NaGdF4:xYb3+(x=0.1,0.2,0.3,0.4,0.5)复合纳米粒子,得出Yb3+的掺杂浓度为40%时,上转换发光强度最高,是核心的6倍;通过在核心纳米粒子外生长惰性壳得到的NaYF4:20%Yb3+,2%Er3+@NaYF4复合纳米粒子也增强了上转换发光,是核心的32倍;通过连续外延生长法得到的核-活性壳-惰性壳NaYF4:20%Yb3+,2%Er3+@NaGdF4:40%Yb3+@NaYF4复合纳米粒子具有最高上转换发光强度,是核心的76倍。最后通过巯基乙醇与巯基乙酸辅助,成功将CdS纳米粒子沉积在核-活性壳-惰性壳NaYF4:20%Yb3+,2%Er3+@NaGdF4:40%Yb3+@NaYF4纳米粒子的表面,得到的NaYF4:20%Yb3+,2%Er3+@NaGdF4:40%Yb3+@NaYF4@CdS复合型光催化剂具有优秀的催化活性。在近红外光照射下,140min后罗丹明B的降解率为53.5%;在模拟太阳光照下,55min后罗丹明B的降解率为86%,是单纯CdS的1.54倍;在经过5次循环实验后,降解率依然高于80%,表明所制备的催化剂具有较好的稳定性及可再利用性。最后通过光催化活性物质试验,得知·O2-在催化过程中起主要作用,h+起次要作用,并探讨了催化机理。
Abstract
ben wen shou xian cai yong re fen jie fa zai bu tong fan ying shi jian 、bu tong fan ying wen du ji bu tong you suan de liang shi yan tiao jian xia cheng gong ge cheng ju you gao pin zhi (chan fen san 、xing mao jun yun 、che cun jun yi )bing ju ju bei jiang de shang zhuai huan fa guang de he xin NaYF4:20%Yb3+,2%Er3+na mi li zi 。tong guo XRD,SEMji guang zhi fa guang biao zheng de dao ,ju you zui jiang shang zhuai huan fa guang he xin NaYF4:20%Yb3+,2%Er3+na mi li zi de zhi bei tiao jian :fan ying shi jian wei 75min;fan ying wen du wei 310℃;jia ru you suan de liang wei 3mL。jie zhao cai yong wai yan sheng chang fa ge cheng le yi ji lie can za bu tong nong du de he -huo xing ke NaGdF4:20%Yb3+,2%Er3+@NaGdF4:xYb3+(x=0.1,0.2,0.3,0.4,0.5)fu ge na mi li zi ,de chu Yb3+de can za nong du wei 40%shi ,shang zhuai huan fa guang jiang du zui gao ,shi he xin de 6bei ;tong guo zai he xin na mi li zi wai sheng chang duo xing ke de dao de NaYF4:20%Yb3+,2%Er3+@NaYF4fu ge na mi li zi ye zeng jiang le shang zhuai huan fa guang ,shi he xin de 32bei ;tong guo lian xu wai yan sheng chang fa de dao de he -huo xing ke -duo xing ke NaYF4:20%Yb3+,2%Er3+@NaGdF4:40%Yb3+@NaYF4fu ge na mi li zi ju you zui gao shang zhuai huan fa guang jiang du ,shi he xin de 76bei 。zui hou tong guo qiu ji yi chun yu qiu ji yi suan fu zhu ,cheng gong jiang CdSna mi li zi chen ji zai he -huo xing ke -duo xing ke NaYF4:20%Yb3+,2%Er3+@NaGdF4:40%Yb3+@NaYF4na mi li zi de biao mian ,de dao de NaYF4:20%Yb3+,2%Er3+@NaGdF4:40%Yb3+@NaYF4@CdSfu ge xing guang cui hua ji ju you you xiu de cui hua huo xing 。zai jin gong wai guang zhao she xia ,140minhou luo dan ming Bde jiang jie lv wei 53.5%;zai mo ni tai yang guang zhao xia ,55minhou luo dan ming Bde jiang jie lv wei 86%,shi chan chun CdSde 1.54bei ;zai jing guo 5ci xun huan shi yan hou ,jiang jie lv yi ran gao yu 80%,biao ming suo zhi bei de cui hua ji ju you jiao hao de wen ding xing ji ke zai li yong xing 。zui hou tong guo guang cui hua huo xing wu zhi shi yan ,de zhi ·O2-zai cui hua guo cheng zhong qi zhu yao zuo yong ,h+qi ci yao zuo yong ,bing tan tao le cui hua ji li 。
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论文详细介绍
论文作者分别是来自长春理工大学的李子娟,发表于刊物长春理工大学2019-10-23论文,是一篇关于稀土氟化物论文,核壳结构论文,硫化镉论文,光催化降解论文,长春理工大学2019-10-23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,资料来自长春理工大学2019-10-23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:稀土氟化物论文; 核壳结构论文; 硫化镉论文; 光催化降解论文; 长春理工大学2019-10-23论文;