{"title":"Enhanced photocatalytic H2 production activity by loading Ni complex on flower-like MoS2 nanomaterials","authors":"Arul Pundi , Zheng-Ting Tsai , Jemkun Chen , Yuan-Hsiang Yu , Chi-Jung Chang","doi":"10.1016/j.jtice.2024.105530","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><p>Exploring efficient H<sub>2</sub>-production photocatalysts is very important for converting solar energy to chemical energy. Some approaches were developed to prevent the recombination of photogenerated electron-hole pairs, ultimately enhancing the photocatalytic H<sub>2</sub> production activity.</p></div><div><h3>Methods</h3><p>3D flower-like MoS<sub>2</sub> nanomaterials were surface-modified by the Ni complex as the redox mediator to make the composite photocatalysts. This work investigated the effect of zeta potential on the Ni-complex loading, charge separation, and photocatalytic H<sub>2</sub> production activity of MoS<sub>2</sub>.</p></div><div><h3>Significant findings</h3><p>The Ni-complex with central cation can be loaded on MoS<sub>2</sub> with negative zeta potential due to the columb attraction force. The photogenerated carriers can transfer from MoS<sub>2</sub> to the central Ni ion of the complex due to the ligands-stabilized multiple oxidation states of Ni, leading to suppressed charge recombination. The FE-TEM mapping and XPS confirm the loading of Ni complex. The photoluminescence, photocurrent response, and EIS tests confirm the improved photoinduced charge separation of the Ni complex-modified photocatalyst. The flower-like microstructure of MoS<sub>2</sub> provides a large specific surface area and high light absorption. The H<sub>2</sub> production activity of MoS<sub>2</sub>-Ni complex photocatalyst (3320 μmol g<sup>−1 h<sup>−1</sup></sup>) is higher than that of the pristine MoS<sub>2</sub> photocatalyst (2576 μmol g<sup>−1 h<sup>−1</sup></sup>).</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.5000,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Taiwan Institute of Chemical Engineers","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1876107024001883","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Background
Exploring efficient H2-production photocatalysts is very important for converting solar energy to chemical energy. Some approaches were developed to prevent the recombination of photogenerated electron-hole pairs, ultimately enhancing the photocatalytic H2 production activity.
Methods
3D flower-like MoS2 nanomaterials were surface-modified by the Ni complex as the redox mediator to make the composite photocatalysts. This work investigated the effect of zeta potential on the Ni-complex loading, charge separation, and photocatalytic H2 production activity of MoS2.
Significant findings
The Ni-complex with central cation can be loaded on MoS2 with negative zeta potential due to the columb attraction force. The photogenerated carriers can transfer from MoS2 to the central Ni ion of the complex due to the ligands-stabilized multiple oxidation states of Ni, leading to suppressed charge recombination. The FE-TEM mapping and XPS confirm the loading of Ni complex. The photoluminescence, photocurrent response, and EIS tests confirm the improved photoinduced charge separation of the Ni complex-modified photocatalyst. The flower-like microstructure of MoS2 provides a large specific surface area and high light absorption. The H2 production activity of MoS2-Ni complex photocatalyst (3320 μmol g−1 h−1) is higher than that of the pristine MoS2 photocatalyst (2576 μmol g−1 h−1).
期刊介绍:
Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.