Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, PR China.
Shimazu China Co LTD, Shanghai, PR China.
J Colloid Interface Sci. 2023 Aug 15;644:304-314. doi: 10.1016/j.jcis.2023.04.111. Epub 2023 Apr 26.
The construction of heterojunctions is commonly regarded as an efficient way to promote the production of hydrogen via photocatalytic water splitting through the enhancement of interfacial interactions. The p-n heterojunction is an important kind of heterojunction with an inner electric field based on the different properties of semiconductors. In this work, we reported the synthesis of a novel CuS/NaNbO p-n heterojunction by depositing CuS nanoparticles on the external surface of NaNbO nanorods, using a facile calcination and hydrothermal method. Through the screening of different ratios, the optimum hydrogen production activity reached 1603 μmol·g·h, which is much higher than that of NaNbO (3.6 times) and CuS (2.7 times). Subsequent characterizations proved semiconductor properties and the existence of p-n heterojunction interactions between the two materials, which inhibited the recombination of photogenerated carriers and improved the efficiency of electron transfer. This work provides a meaningful strategy to utilize the p-n heterojunction structure for the promotion of photocatalytic hydrogen production.
构建异质结被普遍认为是一种通过光催化水分解来提高界面相互作用从而促进产氢的有效方法。p-n 异质结是一种重要的异质结，基于半导体的不同性质，具有内电场。在这项工作中，我们通过在 NaNbO 纳米棒的外表面沉积 CuS 纳米粒子，使用简便的煅烧和水热法，报道了一种新型的 CuS/NaNbO p-n 异质结的合成。通过筛选不同的比例，最佳的产氢活性达到 1603 μmol·g·h，比 NaNbO（3.6 倍）和 CuS（2.7 倍）都高。随后的表征证明了两种材料之间的半导体性质和 p-n 异质结相互作用的存在，抑制了光生载流子的复合，提高了电子转移效率。这项工作为利用 p-n 异质结结构促进光催化产氢提供了一种有意义的策略。
