Fabrication of In(OH)3-In2S3-Cu2O nanofiber for highly efficient photocatalytic hydrogen evolution under blue light LED excitation

This study synthesized the In(OH)3-In2S3 nanosheet via a simple hydrothermal method. The different amounts of In(OH)3-In2S3 nanosheet used to synthesize In(OH)3-In2S3-Cu2O composite by a wet chemical method. FESEM, FETEM, XRD, XPS, BET, UV-vis DRS, and PL spectroscopy characterized the In(OH)3-In2S3-Cu2O composite. Compared with In(OH)3 -In2S3 nanosheet, In(OH)3-In2S3-Cu2O composite can exhibit the synergistic effects of higher specific surface area, higher light-harvesting capacity, and accelerating the sepa-ration and migration of photogenerated charge carriers. In addition, In(OH)3-In2S3-Cu2O nanofiber was fabricated via a facile electrospinning process at the different amounts of In(OH)3-In2S3 nanosheet. The manufacturing process offers many advantages, such as simplicity, low temperature, and without templates. The effect of operational parameters (such as the reaction conditions of photocatalysts, pH values, sacrificial reagents, and light sources) on the photocatalytic hydrogen production of In(OH)3-In2S3-Cu2O nanofiber was investigated. The results indicate that the appropriate reaction conditions of In(OH)3-In2S3 -Cu2O nanofiber can reveal higher efficient photocatalytic water splitting than commercial TiO2 or ZnO nanofiber under blue light LED excitation. Furthermore, In(OH)3-In2S3-Cu2O nanofiber can provide a simple fabrication process, high photocatalytic activity, and high reusability shall be beneficial for the practical application of photocatalytic hydrogen production.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

This study synthesized In(OH)3-In2S3 nanosheet and In(OH)3-In2S3-Cu2O composite via hydrothermal and wet chemical methods, respectively. The composite showed enhanced properties compared to the nanosheet, including higher surface area, light-harvesting capacity, and charge carrier separation. In addition, In(OH)3-In2S3-Cu2O nanofiber was fabricated through electrospinning with simplicity and high photocatalytic activity. The study also investigated the parameters affecting the photocatalytic hydrogen production of the nanofiber and demonstrated its superior performance. These findings contribute to the practical application of photocatalytic hydrogen production.