Photocatalytic Strategies for Sustainable Wastewater Remediation and Energy Generation

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Photocatalysis".

Deadline for manuscript submissions: 30 April 2026 | Viewed by 575

Special Issue Editors


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Guest Editor
Green Engineering Research Group, Department of Chemical Engineering, Faculty of Engineering and the Built Environment, Durban University of Technology, Durban 4001, South Africa
Interests: water and wastewater treatment technology; biophotocatalysis; membrane technology; bioenergy; process optimization; response surface methodology; green engineering; green catalysis; nanotechnology and magnetic separation technology
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Guest Editor
Green Engineering Research Group, Department of Chemical Engineering, Faculty of Engineering and the Built Environment, Durban University of Technology, Durban, South Africa
Interests: water and wastewater treatment technologies; green engineering; membrane technology; process optimization; advanced oxidation process; nanotechnology; magnetic separation process
Special Issues, Collections and Topics in MDPI journals

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Guest Editor Assistant
School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg 2050, South Africa
Interests: catalysis; renewable energy; environmental sustainability; energy transition; climate change
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Guest Editor Assistant
Department of Chemical Engineering, University of Ilorin, P.M.B. 1515, Ilorin, Nigeria
Interests: development of supported/unsupported nanocomposites catalysts (Catalysis); production of biofuels; process modelling and simulation; wastewater treatment

Special Issue Information

Dear Colleagues,

The convergence of water scarcity, environmental pollution, and the growing prevalence of biorecalcitrant and emerging contaminants in global water systems underscores an urgent need for sustainable and energy-efficient wastewater treatment technologies. Simultaneously, the global transition towards clean energy, especially green hydrogen production and solar-driven energy processes, demands a scalable and innovative approach grounded in catalytic science. Herein, catalysis, particularly photocatalysis using solar energy, offers a dual solution by enabling both pollutant degradation and renewable energy generation.

Addressing both environmental impact and practical deployment, as a way of bridging the gap between laboratory-based research and scalable field applications, this Special Issue of MDPI Catalysis invites cutting-edge original research articles, critical reviews, and real-world case studies that explore advanced catalytic strategies to address converging challenges.

We seek contributions exploring metal–organic frameworks (MOFs), doped semiconductors, magnetic photocatalysis, reaction mechanisms, reactor design, AI-assisted process optimisation, synthesis and characterisation of nanocomposites, and solar-assisted degradation strategies, including their application in hybrid systems and circular economy models.

Furthermore, emphasis is placed on technologies that integrate wastewater purification with renewable energy generation for real-world adaption at the water–energy–environmental nexus. As this Special Issue aims to showcase transformative catalytic innovations that are not limited to shaping the future of sustainable catalysis with insight into economic feasibility, technological readiness, and environmental impact

We, therefore, look forward to your contributions and feedback to make this a leading platform for catalysis research at the interdisciplinary of water, energy, and environment with green technological solutions.

Dr. Emmanuel Kweinor Tetteh
Prof. Dr. Sudesh Rathilal
Guest Editors

Dr. Ifeanyi Michael Smarte Anekwe
Dr. Sherif Ishola Mustapha
Guest Editor Assistants

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Keywords

  • catalysis
  • metal–organic framework
  • semiconductors
  • nanotechnology
  • water splitting
  • photocatalysis
  • green hydrogen
  • renewable energy

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Published Papers (1 paper)

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Research

29 pages, 4612 KB  
Article
Maximizing Anilinium Ionic Solid Mineralization Using RSM: A COD and TOC Study of Photocatalytic Degradation
by Vuyolwethu Tokoyi, Emmanuel Kweinor Tetteh and Nirmala Deenadayalu
Catalysts 2025, 15(12), 1109; https://doi.org/10.3390/catal15121109 - 28 Nov 2025
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Abstract
The toxicity of anilinium-based compounds continues to increase with their prevalence in industrial effluents, posing a significant threat to aquatic ecosystems. To address this, a photocatalytic system comprising UV/H2O2/Ti-MOF was developed and optimized for the degradation of ionic solids [...] Read more.
The toxicity of anilinium-based compounds continues to increase with their prevalence in industrial effluents, posing a significant threat to aquatic ecosystems. To address this, a photocatalytic system comprising UV/H2O2/Ti-MOF was developed and optimized for the degradation of ionic solids (ISs). The synthesized Ti-MOF was characterized for its absorption and energy transmission capacity, morphological and elemental properties, thermal stability, and phase behavior, with UV-Vis, SEM-EDX, XRD, and TGA-DSC, respectively. The degradation experiment under UV irradiation in the presence of hydrogen peroxide (H2O2) and Ti-MOF illustrated an enhanced catalytic efficiency of the system when compared to blank experiments without the MOF catalyst. A response surface methodology (RSM) based on the Box–Behnken design (BBD) was then employed to evaluate and optimize key parameters, including IS concentration (150–650 mg/mL), time (1–5 h), and H2O2 (1–5%), in terms of the degradation efficiency. At optimal conditions for an IS concentration of 650 mg/mL, time of 3 h, and H2O2 concentration of 5%, an actual degradation efficiency of 57.5% was obtained, with 55.52% predicted by the RSM model at a 95% confidence level. Analysis of variance revealed statistical significance in the response models, with a coefficient of determination (R2) greater than 0.94, in agreement with the adjusted R2 value of less than 0.89. Kinetic analysis revealed that the degradation followed pseudo-first-order kinetics, exhibiting good reusability over multiple cycles. The study shows the potential of the UV/H2O2/Ti-MOF system as a sustainable and highly efficient approach to treating recalcitrant IS pollutants in wastewater. Full article
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