Elemental sulfur supported on ultrathin titanic acid nanosheets for photocatalytic reduction of CO2 to CH4
Elemental sulfur supported on ultrathin titanic acid nanosheets for photocatalytic reduction of CO2 to CH4
复制标题
超薄钛酸纳米片负载元素硫用于光催化还原 CO2 为 CH4
DOI：
10.1016/j.apsusc.2022.156224
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发表时间：
2022
影响因子：
6.7
通讯作者：
Shijing Liang
中科院分区：
文献类型：
--
作者：
Suwei Lu;Wanru Liao;Weihang Chen;Min-Quan Yang;Shuying Zhu;Shijing Liang
光催化还原CO2为能源密集型碳氢燃料是解决环境和能源问题的一个重要途径。本文通过简单的原位组装方法，在钛酸纳米片上负载不同质量含量的单质硫，设计并合成了负载单质硫的钛酸纳米片（S/HTO）异质结构。所设计的S/HTO异质结构不仅增强了光吸收，有利于CO2的吸附，而且显著促进了界面电荷输运，抑制了光生载流子的复合.因此，所制备的S/HTO异质结构在模拟太阳光照射下表现出增强的光催化CO2还原性能。在不使用助催化剂和牺牲剂的情况下，最佳15 S/HTO复合物的CH 4产率为1.92 μmol h-1 g-1。光活性分别是HTO纳米片和空白S的5.4倍和23倍。此外，S/HTO杂化复合材料还表现出用于产生CH 4的高稳定性。
The photocatalytic reduction of CO2 into energy-intensive hydrocarbon fuels is promising to solve environment and energy issues. Here, elemental sulfur supported on ultrathin titanic acid nanosheets (S/HTO) heterostructure is designed and synthesized by loading different weight contents of elemental S on HTO nanosheets via a simple in-situ disproportionation-assembly process. The as-designed S/HTO heterostructure not only enhances light absorption and facilitates CO2 adsorption, but also significantly promotes the interfacial charge transport, and suppresses the recombination of photogenerated charge carriers. As a consequence, the as-prepared S/HTO heterostructure exhibits enhanced performance in photocatalytic CO2 reduction under simulated solar light illumination. A CH4 yield rate of 1.92 μmol h− 1 g− 1 is obtained over the optimal 15S/HTO composite without the using of cocatalyst and sacrificial agent. The photoactivity is 5.4-fold and 23-fold larger than that of HTO nanosheets and blank S, respectively. In addition, the S/HTO hybrid composite also presents high stability for the production of CH4.