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首页> 外文期刊>Crystal growth & design >One-Step Synthesis of Water-Soluble Quantum Dots from Ag2S and AgInS2 QDs
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One-Step Synthesis of Water-Soluble Quantum Dots from Ag2S and AgInS2 QDs

机译：ag2s和agins2 qds的一步合成水溶性量子点

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摘要

Water-soluble quantum dots (QDs) have attracted much attention because of their excellent optical stability and biocompatibility. Here we report a simple, easy to operate, safe, and nontoxic method to synthesize water-soluble Ag2S QDs and AgInS2 (AIS) QDs. By addition of L-cysteine to the Ag+ and In3+ precursor solution, the water-soluble Ag2S and AIS QDs can be synthesized through the hydrothermal method. With increased reaction temperatures and times, Ag2S QDs were converted to AIS QDs. The colors were adjusted from green light to red light under UV light. The absorption spectra were red-shifted as a whole with increasing time and temperature. The fluorescence peaks at 80 and 90 degrees C did not change with time (greater or equal to 2 h), but the fluorescence peaks at 100 degrees C had a relatively large change from 470 to 650 nm. The band gaps of Ag2S QDs had a large change from 2.2 to 0.9 eV due to crystallinity, and the band gap of the AIS QDs was about 0.9 eV. The photocatalytic H-2 production performance was studied. The results indicated that the Ag2S QDs obtained by reaction at 90 degrees C for 4 h exhibited the greatest amount of H-2 production (1240 mu mol.g(-1).h(-1)). Finally, the reaction process was also investigated.
机译：水溶性量子点（QDS）由于其优异的光学稳定性和生物相容性而引起了很多关注。在这里，我们报告了一种简单，易于操作，安全和无毒的方法，用于合成水溶性Ag2s QD和agins2（AIS）QDS。通过向Ag +和In3 +前体溶液中加入L-半胱氨酸，可以通过水热法合成水溶性Ag2s和AIS QD。随着反应温度的增加和时间，AG2S QD转化为AIS QD。根据紫外线，从绿光到红光调节颜色。随着时间和温度的增加，吸收光谱作为整体被红移。在80和90℃下的荧光峰随时间（更大或等于2小时）而没有改变，但是在100℃下的荧光峰值从470到650nm的相对大的变化。由于结晶度，AG2S QD的带间隙从2.2到0.9eV变大，AIS QD的带隙约为0.9eV。研究了光催化H-2生产性能。结果表明，通过在90℃下反应获得的Ag2S QDS 4小时，表现出最多的H-2生产（1240μmmol.g（-1）.h（-1））。最后，还研究了反应过程。

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  • 来源
    《Crystal growth & design》 |2020年第7期|共8页
  • 作者

    Yuan Binxia; Cai Xiaodong; Fang Xin Yi; Wang Daolei; Cao Sheng; Zhu Rui; Liu Jianfeng;

  • 作者单位

    Shanghai Univ Elect Power Coll Energy &

    Mech Engn Shanghai 200090 Peoples R China;

    Shanghai Univ Elect Power Coll Energy &

    Mech Engn Shanghai 200090 Peoples R China;

    Shanghai Univ Elect Power Coll Energy &

    Mech Engn Shanghai 200090 Peoples R China;

    Shanghai Univ Elect Power Coll Energy &

    Mech Engn Shanghai 200090 Peoples R China;

    Guangxi Univ Guangxi Key Lab Proc Nonferrous Met &

    Featured Ma Nanning 530004 Peoples R China;

    Shanghai Univ Elect Power Coll Energy &

    Mech Engn Shanghai 200090 Peoples R China;

    Shanghai Univ Elect Power Coll Energy &

    Mech Engn Shanghai 200090 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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