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An Efficient ZnIn2S4@CuInS2 Core–Shell p–n Heterojunction to Boost Visible-Light Photocatalytic Hydrogen Evolution
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-03-05 , DOI: 10.1021/acs.jpcc.9b11623 Xinlei Guo 1 , Yanhua Peng 1 , Guangbo Liu 2 , Guangwen Xie 3 , Yanan Guo 1 , Yan Zhang 1 , Jianqiang Yu 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-03-05 , DOI: 10.1021/acs.jpcc.9b11623 Xinlei Guo 1 , Yanhua Peng 1 , Guangbo Liu 2 , Guangwen Xie 3 , Yanan Guo 1 , Yan Zhang 1 , Jianqiang Yu 1
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The efficient separation of photoexcited electrons and holes is crucial for improving the activity of photocatalytic hydrogen evolution. Herein, an efficient core–shell p–n heterojunction of ZnIn2S4@CuInS2 microflowers has been devised and fabricated by two-step hydrothermal method. The results revealed that the marigold-like microspheres of ZnIn2S4@CuInS2 heterojunction consisted of thin nanosheets, matched well in the lattice, and had a large interface contact area, which boosted charge separation and transfer for solar hydrogen production. Moreover, the intimate interfacial contact between n-type ZnIn2S4 and p-type CuInS2 resulted in the formation of unique p–n heterojunction, which further promoted charge separation due to the built-in electric field. As a consequence, the ZnIn2S4@CuInS2 photocatalyst with 5 atom % CuInS2 showed the highest production of H2 evolution (about 1168 μmol·g–1) among all prepared photocatalysts, which was nearly 4-fold the amount of the hydrogen production for the pristine ZnIn2S4. Therefore, the core–shell p–n heterojunction is an efficient structure design for the utilization of solar energy to obtain clean energy.
中文翻译：
高效的ZnIn 2 S 4 @CuInS 2核-壳p-n异质结，促进可见光光催化氢的释放
光激发电子和空穴的有效分离对于提高光催化氢释放的活性至关重要。在此，通过两步水热法设计并制造了一种高效的ZnIn 2 S 4 @CuInS 2核-壳p-n异质结。结果表明，ZnIn 2 S 4 @CuInS 2异质结的万寿菊状微球由薄的纳米片组成，在晶格中匹配良好，并且具有较大的界面接触面积，从而促进了电荷的分离和转移，从而产生了太阳能氢。此外，n型ZnIn 2 S 4与p型CuInS之间的紧密界面接触2导致形成独特的p–n异质结，由于内置电场，进一步促进了电荷分离。其结果是，在日宁2小号4个@CuInS 2光催化剂用5％（原子）的CuInS 2显示出最高的生产H的2演进（约1168微摩尔·克-1）所有准备光催化剂，这是近4倍的量之间原始ZnIn 2 S 4的氢产生。因此，核-壳PN异质结是一种有效的结构设计，旨在利用太阳能获得清洁能源。
更新日期：2020-03-05
中文翻译：
高效的ZnIn 2 S 4 @CuInS 2核-壳p-n异质结，促进可见光光催化氢的释放
光激发电子和空穴的有效分离对于提高光催化氢释放的活性至关重要。在此，通过两步水热法设计并制造了一种高效的ZnIn 2 S 4 @CuInS 2核-壳p-n异质结。结果表明，ZnIn 2 S 4 @CuInS 2异质结的万寿菊状微球由薄的纳米片组成，在晶格中匹配良好，并且具有较大的界面接触面积，从而促进了电荷的分离和转移，从而产生了太阳能氢。此外，n型ZnIn 2 S 4与p型CuInS之间的紧密界面接触2导致形成独特的p–n异质结，由于内置电场，进一步促进了电荷分离。其结果是，在日宁2小号4个@CuInS 2光催化剂用5％（原子）的CuInS 2显示出最高的生产H的2演进（约1168微摩尔·克-1）所有准备光催化剂，这是近4倍的量之间原始ZnIn 2 S 4的氢产生。因此，核-壳PN异质结是一种有效的结构设计，旨在利用太阳能获得清洁能源。
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