Robust Photocatalytic H2O2 Production over Inverse Opal g-C3N4 with Carbon Vacancy under Visible Light
Robust Photocatalytic H2O2 Production over Inverse Opal g-C3N4 with Carbon Vacancy under Visible Light
复制标题
可见光下具有碳空位的反蛋白石 g-C3N4 的稳健光催化 H2O2 生产
DOI：
10.1021/acssuschemeng.9b03678
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发表时间：
2019-10-07
影响因子：
8.4
通讯作者：
Zhang, Jinlong
中科院分区：
文献类型：
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作者：
Lei, Juying;Chen, Bin;Zhang, Jinlong
在绿色化学领域，过氧化氢是一种很有前途的工业和环保化工原料。本文中，我们同时在氮化碳中引入反蛋白石（IO）结构和碳空位（CV）以提高通过CVD的H2 O2产生。实验结果表明，在可见光照射2小时后，IO氮化碳（IO CN-Cv）显示出H2 O2生成值为325.74 μ M，分别是本体CN-Cvs（具有Cvs的本体氮化碳）、本体CN（没有Cvs的本体氮化碳）和纳米片CN（氮化碳纳米片）的H2 O2生成值的1.69、2.13和1.84倍。一方面，典型的IO结构提高了可见光吸收效率，同时为分子氧的吸附提供了更大的表面积。同时，Cvs的引入提高了载流子的分离能力。该研究为在能源短缺的时代，利用可见光和无金属材料增强H2 O2的生产提供了新的思路。
In the field of green chemistry, producing hydrogen peroxide (H2O2) via photocatalysis could be a promising method for obtaining chemical feedstock during industrial and environmental processes. Herein, we simultaneously introduced inverse opal (IO) structure and carbon vacancies (CVs) into carbon nitride to improve H2O2 production by photocatalysis. Experimental results reveal that, after visible light irradiation for 2 h, IO carbon nitride (IO CN-Cv) shows a H2O2 generation value of 325.74 mu M over 1.69, 2.13, and 1.84 times more than the H2O2 generation of bulk CN-Cvs (bulk carbon nitride with Cvs), bulk CN (bulk carbon nitride without Cvs), and nanosheet CN (carbon nitride nanosheet), respectively. On the one hand, the typical IO structure improves the efficiency of visible light absorption and simultaneously provides more surface area for the adsorption of molecular oxygen. Meanwhile, the introduction of Cvs improves the separation ability of carriers. This study offers a new idea for enhanced production of H2O2 using visible light with metal-free materials in the era of energy shortage.