# Expression of concern: Designing a novel visible-light-driven heterostructure Ni–ZnO/S-g-C3N4 photocatalyst for coloured pollutant degradation

## TL;DR

This paper addresses concerns about a study on a new photocatalyst for breaking down colored pollutants using visible light.

## Contribution

The paper raises concerns about the reliability or validity of the original study's claims and findings.

## Key findings

- The original study claimed a novel Ni–ZnO/S-g-C3N4 photocatalyst for visible-light-driven degradation of pollutants.
- This expression of concern questions the accuracy or reproducibility of the reported results.
- It highlights the need for further verification of the experimental claims.

## Abstract

Expression of concern for ‘Designing a novel visible-light-driven heterostructure Ni–ZnO/S-g-C3N4 photocatalyst for coloured pollutant degradation’ by Ali Bahadur et al., RSC Adv., 2021, 11, 36518–36527, https://doi.org/10.1039/d0ra09390d.