Abstract Due to the poor photocatalytic hydrogen evolution ability of pure CdS, we need to develop a photocatalytic hydrogen evolution catalyst with high activity and no precious metal doping. Therefore, in this article, we used a simple hydrothermal synthesis of CdS nanoparticles, using water as a carrier, loading a small amount of amorphous CoS, by changing the loading ratio of amorphous CoS, synthesized TYPE–II type heterojunction composite catalyst CCS. The successful synthesis of the composite catalyst CCS was verified by XRD, SEM and other characterization methods. UV–vis, PL and other characterization showed that the supported amorphous CoS could significantly improve the photocatalytic activity of CdS, and the photochemical detection also showed that the performance of composite catalyst CCS was better than that of pure CdS. Using Na 2 S and Na 2 SO 3 mixed solution as electron sacrificial agent, the hydrogen production performance of CCS composite catalyst was determined through hydrogen evolution experiment and cyclic stability experiment. It was found that the sacrificial agent had a great promotion effect on the hydrogen production performance of photocatalyst. It was found that the hydrogen production rate of the composite catalyst could reach 2.01 mmol·g −1 ·h −1 , which was 6.3 times of the pure CdS. This study offers a novel approach for the design of amorphous–based nanostructures as efficient hydrogen evolution cocatalysts. Graphic Abstract First, CdS are excited by light, consuming S 2− and SO 3 2− ions in the sacrificial agent, generating a large number of electrons and holes. Due to the energy difference between the conducting band (CB) of CdS and amorphous CoS, the electrons are transferred from the surface of CdS to the conducting band (CB) of amorphous CoS, while the electrons obtained from water and H + in the sacrificial agent are reduced to H 2 . The amorphous CoS is used as the transfer medium of electron acceptor, and the synergistic effect between heterojunctions is used to improve the charge separation efficiency and electron transfer rate. Therefore, the photocatalytic hydrogen production effect of the composite catalyst CCS–7 has been greatly improved.

中文翻译：

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用于可见光驱动光催化析氢的无定形 CoS/CdS 纳米颗粒异质结的构建

摘要 由于纯CdS光催化析氢能力较差，需要开发一种高活性、无贵金属掺杂的光催化析氢催化剂。因此，本文采用简单的水热合成CdS纳米粒子，以水为载体，负载少量非晶CoS，通过改变非晶CoS的负载比例，合成了TYPE-II型异质结复合催化剂CCS。通过XRD、SEM等表征方法验证了复合催化剂CCS的成功合成。UV-vis、PL等表征表明负载型无定形CoS可以显着提高CdS的光催化活性，光化学检测也表明复合催化剂CCS的性能优于纯CdS。以Na 2 S和Na 2 SO 3 混合溶液为电子牺牲剂，通过析氢实验和循环稳定性实验，确定了CCS复合催化剂的制氢性能。发现牺牲剂对光催化剂的产氢性能有很大的促进作用。结果表明，复合催化剂的产氢速率可达2.01 mmol·g -1 ·h -1 ，是纯CdS的6.3倍。这项研究为设计无定形纳米结构作为有效的析氢助催化剂提供了一种新方法。图形摘要 首先，CdS 被光激发，消耗牺牲剂中的 S 2- 和 SO 3 2- 离子，产生大量的电子和空穴。由于 CdS 和非晶 CoS 的导带 (CB) 之间的能量差异，电子从 CdS 表面转移到非晶 CoS 的导带 (CB)，而从牺牲层中的水和 H + 获得电子试剂被还原为 H 2 。以非晶CoS作为电子受体的转移介质，利用异质结之间的协同效应提高电荷分离效率和电子转移速率。因此，复合催化剂CCS-7的光催化制氢效果得到了极大的提高。以非晶CoS作为电子受体的转移介质，利用异质结之间的协同效应提高电荷分离效率和电子转移速率。因此，复合催化剂CCS-7的光催化制氢效果得到了极大的提高。以非晶CoS作为电子受体的转移介质，利用异质结之间的协同效应提高电荷分离效率和电子转移速率。因此，复合催化剂CCS-7的光催化制氢效果得到了极大的提高。