Dual-function akaganeite (β-FeOOH) a photo-Fenton system for hydrogen generation and pollutant degradation: Causal Claims and Confounding

Causal language requires a design that separates the proposed mechanism from selection effects, omitted variables, and other plausible explanations. This structured evidence review evaluates "Dual-function akaganeite (β-FeOOH) a photo-Fenton system for hydrogen generation and pollutant degradation" alongside nine author-disjoint, topically matched publications in photo-Fenton catalysis. It compares construct definitions, evaluation choices, operating assumptions, and reported limitations instead of treating bibliographic similarity as empirical equivalence. Viewed through causal interpretation and confounding control, the map separates claims supported by the available record from questions that still require full-text extraction, replication, or new experiments. The synthesis is interpretive rather than meta-analytic and therefore does not present a pooled effect estimate or a new causal result. The resulting agenda requires a stated causal estimand, defensible controls, negative checks, and sensitivity analyses for unmeasured confounding.

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2. Wang, Z., You, J., Li, J., Xu, J., Li, X., Duan, M., & Zhang, H. (2023). Two‐Dimensional BiOBr Nanosheets Coupled with FeOOH Quantum Dots as Composite Photo‐Fenton Catalysts for Organic Pollutant Degradation under Visible Light. ChemistrySelect, 8(45). https://doi.org/10.1002/slct.202301199 DOI
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5. Wu, P., Zhou, C., Li, Y., Zhang, M., Tao, P., Liu, Q., & Cui, W. (2021). Flower-like FeOOH hybridized with carbon quantum dots for efficient photo-Fenton degradation of organic pollutants. Applied Surface Science, 540, 148362. https://doi.org/10.1016/j.apsusc.2020.148362 DOI
6. Qian, X., Ren, M., Zhu, Y., Yue, D., Han, Y., Jia, J., & Zhao, Y. (2017). Visible Light Assisted Heterogeneous Fenton-Like Degradation of Organic Pollutant via α-FeOOH/Mesoporous Carbon Composites. Environmental Science & Technology, 51(7), 3993-4000. https://doi.org/10.1021/acs.est.6b06429 DOI
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9. Díez, A.-M., Pazos, M., & Sanromán, M.-A. (2019). Synthesis of magnetic-photo-Fenton catalyst for degradation of emerging pollutant. Catalysis Today, 328, 267-273. https://doi.org/10.1016/j.cattod.2018.12.042 DOI
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