Retraction notice to “The construction of novel CuO/SnO₂@g-C₃N₄ photocatalyst for efficient degradation of ciprofloxacin, methylene blue and photoinhibition of bacteria through efficient production of reactive oxygen species” [Environ. Res. Volume 231, Part 1, 15 August 2023, 116086] (Environmental Research (2023) 231(P1), (S0013935123008782), (10.1016/j.envres.2023.116086))

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/policies/article-withdrawal). This article has been retracted at the request of the Editor. Concerns about image integrity in this article were raised on PubPeer at https://pubpeer.com/publications/483FEFFA40BC4D34BAA96628D67DBB. The editor confirmed that a number of the images contain numerous instances of significant and complex regions which appear to be duplicated, however the author's response regarding these phenomena was not satisfactory. The Editor has therefore lost confidence in the reliability of the findings presented in this article as a whole and is retracting it. An unauthorised authorship change was made when the revised version of this paper was submitted with seven authors - Karma Albalawi, Zia Ul Haq Khan, Magdi E.A. Zaki, Ebraheem Abdu Musad Saleh, Eman A. Alabbad, Talal M. Althagafi, Fahad Abdulaziz - being added to the paper. No satisfactory explanation was given for this change, nor was it approved by the editor. This authorship change breaches the policies of the journal and as a result, the editor no longer has confidence in this paper and is retracting it. The journal apologises for not having identified the problematic authorship change during the review process and for any resulting inconvenience.