Enhanced Solar Light Absorption and Photoelectrochemical Conversion Using TiN Nanoparticle-Incorporated C3N4-C Dot Sheets.
Enhanced Solar Light Absorption and Photoelectrochemical Conversion Using TiN Nanoparticle-Incorporated C3N4-C Dot Sheets.
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DOI：
10.1021/acsami.7b15066
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发表时间：
2018-01
影响因子：
9.5
通讯作者：
S. Shinde;S. Ishii;T. D. Dao;R. P. Sugavaneshwar;T. Takei;K. Nanda;T. Nagao
中科院分区：
文献类型：
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作者：
S. Shinde;S. Ishii;T. D. Dao;R. P. Sugavaneshwar;T. Takei;K. Nanda;T. Nagao
在本工作中，通过合成无金属氮化碳-碳点(C3N4-C点)和等离子体氮化钛(TiN)纳米粒子(NPs)的复合材料来改善模拟太阳辐射下的光电化学分解水性能，开发了一种有希望的增加宽带太阳光吸收的策略。等离子体TiN纳米粒子向C3N4注入的热电子起到了光催化作用，而C点则起到了催化H_2O_2分解为O_2的作用。C点的使用也消除了对牺牲性试剂的需要，并防止了催化中毒。通过引入TiN纳米粒子和C点，观察到C3N4的催化性能提高了6倍。所提出的将纳米TiN和C点与C3N4相结合的方法在克服低的光吸收和电荷复合损失方面被证明是有效的，并且还加宽了光谱窗口，从而提高了光催化活性。
In this work, a promising strategy to increase the broadband solar light absorption was developed by synthesizing a composite of metal-free carbon nitride-carbon dots (C3N4-C dots) and plasmonic titanium nitride (TiN) nanoparticles (NPs) to improve the photoelectrochemical water-splitting performance under simulated solar radiation. Hot-electron injection from plasmonic TiN NPs to C3N4 played a role in photocatalysis, whereas C dots acted as catalysts for the decomposition of H2O2 to O2. The use of C dots also eliminated the need for a sacrificial reagent and prevented catalytic poisoning. By incorporating the TiN NPs and C dots, a sixfold improvement in the catalytic performance of C3N4 was observed. The proposed approach of combining TiN NPs and C dots with C3N4 proved effective in overcoming low optical absorption and charge recombination losses and also widens the spectral window, leading to improved photocatalytic activity.