# Expression of concern: A well-defined S-g-C3N4/Cu–NiS heterojunction interface towards enhanced spatial charge separation with excellent photocatalytic ability: synergetic effect, kinetics, antibacterial activity, and mechanism insights

## TL;DR

This paper addresses concerns about a study on a photocatalytic material's charge separation and antibacterial properties.

## Contribution

The paper raises an expression of concern regarding prior research findings and methodology.

## Key findings

- Issues were identified with the original study's data and conclusions.
- The paper calls for further verification of the reported photocatalytic and antibacterial results.

## Abstract

Expression of concern for ‘A well-defined S-g-C3N4/Cu–NiS heterojunction interface towards enhanced spatial charge separation with excellent photocatalytic ability: synergetic effect, kinetics, antibacterial activity, and mechanism insights’ by Haya A. Abubshait et al., RSC Adv., 2022, 12, 3274–3286, https://doi.org/10.1039/D1RA07974C.