Hybridizing engineering strategy of non-lacunary (nBu(4)N)(4)W10O32 by carbon quantum dot with remarkably enhanced visible-light-catalytic oxidation performance
Hybridizing engineering strategy of non-lacunary (nBu(4)N)(4)W10O32 by carbon quantum dot with remarkably enhanced visible-light-catalytic oxidation performance
复制标题
碳量子点非空位(nBu(4)N)(4)W10O32杂化工程策略显着增强可见光催化氧化性能
DOI：
10.1016/j.apcata.2019.117261
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Liu Yachun
中科院分区：
文献类型：
--
作者：
Su Anqun;Chen Mengke;Fu Zaihui;Yang Bo;She Jialuo;Wan Feifei;Zhang Chao;Liu Yachun
本文公开了一种制备碳量子点（CQD）杂化（nBu4N）4W10O32（TBADT）的有效策略。该策略的关键步骤是用 TBABr 溶液对 CQD 进行水热处理，形成 TBA+胶束封装的 CQD，其充当阳离子杂化剂，与 W10O324−阴离子结合产生目标催化剂。 XPS、UV-vis、PL和CV表征表明，CQD杂化剂在提高TBADT的结构稳定性、氧化还原能力和可见光响应方面发挥着独特的作用，特别是在增强其光激发态的稳定性方面。在可见光触发的乙腈中双氧对环己烷、甲苯、乙苯和苯甲醇的选择性氧化中，含有3% CQD的优化杂化物表现出比纯TBADT更高的光催化活性，在环己烷光氧化中提供了约21.7%的转化率和84.8%的环己酮选择性，此外，添加剂2M HCl进一步增强了上述杂化效果，从而显着促进了目前的光催化氧化。
This paper discloses an efficient strategy for the preparation of carbon quantum dot (CQD)- hybridized (nBu4N)4W10O32(TBADT). A key step in this strategy is to hydrothermally treat CQD with TBABr solution to form the TBA+micelle-encapsulated CQD, which acts as a cationized hybridizer to combine with the W10O324−anion to yield the target catalyst. XPS, UV–vis, PL and CV characterizations indicated that CQD hybridizer plays unique roles in improving the structural stability, redox capacity and visible light response of TBADT, especially in enhancing the stability of its photo-excited state. In the visible light-triggered selective oxidation of cyclohexane, toluene, ethylbenzene and benzyl alcohol with dioxygens in acetonitrile, the optimized hybrid containing 3% CQD shows much higher photo-catalytic activity than pure TBADT, affordingca.21.7% conversion and 84.8% cyclohexanone selectivity in cyclohexane photo-oxidation, Additionally, the additive 2 M HCl further enhances the above hybridization effects, thereby significantly promoting the current photo-catalytic oxidations.