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Chemistry
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Photocatalytic Process for Water Remediation and Water Splitting
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Photocatalytic Process for Water Remediation and Water Splitting

A special issue of Chemistry (ISSN 2624-8549). This special issue belongs to the section "Photochemistry and Excited States".

Deadline for manuscript submissions: 30 November 2026 | Viewed by 2405

Editors

Dr. Anupam Singha Roy

E-Mail Website
Guest Editor
School of Sciences, Woxsen University, Hyderabad 502345, India
Interests: heterogeneous catalysis; nanomaterial and nano-catalyst design; biomaas conversion; environmental remediation
Dr. Sekar Karthikeyan

E-Mail Website
Guest Editor
1. SRM Institute of Science and Technology, Kattankulathur, India
2. School of Civil and Environmental Engineering, Yonsei University, Seoul, Republic of Korea
Interests: catalysts; nanomaterials design; photochemistry; photo(electro)catalysts; environmental and energy applications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Photocatalysis has been demonstrated to be a promising sustainable technology for addressing two key global challenges: the provision of clean water supplies and development of carbon‐neutral energy systems. Thanks to advances in semiconductor materials, nano-structuring, interface-engineering, and visible-light activation, the efficiency of photocatalytic processes favorable for water purification or water-splitting has been greatly improved. These advancements can enable the degradation of organic pollutants, pharmaceuticals, dyes, pesticides, and emerging contaminants, as well as the production of hydrogen via efficient water splitting.

The objective of this Special Issue, “Photocatalytic Process for Water Remediation and Water Splitting” is to showcase recent advances in photocatalyst development as well as mechanistic insights into process optimization. We invite researchers to submit papers on novel materials, heterojunction systems, photocatalysts based on MXene and carbon, advanced characterization techniques, and kinetic models for the development of reactors from laboratory- to pilot-scale applications. We are particularly interested in (i) studies that connect fundamental analysis of photocatalysis with its practical realization and (ii) studies on the long-term stability/techno-economic prospects of photocatalysis. By bringing together interdisciplinary research from chemistry, materials science, environmental engineering, and renewable energy, this Special Issue seeks to provide valuable insights and guide future advancements in sustainable photocatalytic technologies.

Dr. Anupam Singha Roy
Dr. Sekar Karthikeyan
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Chemistry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • photocatalysis
  • water remediation
  • water splitting
  • hydrogen production
  • advanced oxidation processes
  • semiconductor catalysts
  • heterojunctions
  • nanocomposites
  • solar energy conversion
  • photocatalytic mechanism

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Published Papers (2 papers)

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Review

38 pages, 11716 KB  
Review
A Comprehensive Review on Hydrothermally Tuning SrTiO3 for Efficient Photocatalytic Applications: Water Remediation and Water Splitting
by Soujanya Nethi, Pallavi Saxena and Anupam Singha Roy
Chemistry 2026, 8(7), 94; https://doi.org/10.3390/chemistry8070094 - 6 Jul 2026
Viewed by 840
Abstract
Global requirement of clean, cost-effective and sustainable energy has stimulated massive research and development in photocatalytic materials that have the potential to harvest solar based energy while mitigating the environmental issues. Among various materials, perovskite oxides have emerged as a promising energy resource. [...] Read more.
Global requirement of clean, cost-effective and sustainable energy has stimulated massive research and development in photocatalytic materials that have the potential to harvest solar based energy while mitigating the environmental issues. Among various materials, perovskite oxides have emerged as a promising energy resource. Owing to the structural versatility, optical and electrical properties, chemical inertness allows the use of material of multifunctional prospects. Currently Strontium titanate (SrTiO3), a vital perovskite oxide having a band gap nearly ~3.2 eV, is showing significant function for photocatalytic water splitting, carbon dioxide conversion and degradation of organic pollutants. Though within the UV spectrum, its intrinsic photocatalytic behavior is limited to approaches such as graphene junctions, noble-metal support, and post-synthetic heat treatment seem to promote the adsorption within visible-light. Strontium titanate also demonstrates photo charge separation efficiency, and long-term catalytic durability. Moreover, modifications and hydrothermal synthesis have proven extremely efficient for nano-based engineering, control over crystal diameter, defects, and shape, which can result in magnificent composites that can be promising substitutes. Therefore, further research is imperative regarding these material application prospects. This comprehensive review provides insights into details on the potential of nanoengineering and composite approaches to reduce the inherent limitations of perovskite oxides, especially Strontium titanate, and enabling additional applications in next-generation photovoltaic and solar energy harvesting technologies. Full article
(This article belongs to the Special Issue Photocatalytic Process for Water Remediation and Water Splitting)
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26 pages, 1765 KB  
Review
Nanozyme-Based Portable Water Purification Systems for Villages and Emergency Situations: A New Approach
by Nandini Chauhan, Garima Awasthi, Mahipal Singh Sankhla, Kumud Kant Awasthi, Rajeev Kumar, Narendra Kumar, Baljeet Yadav and Haitham Al Qahtani
Chemistry 2026, 8(6), 85; https://doi.org/10.3390/chemistry8060085 - 17 Jun 2026
Cited by 1 | Viewed by 777
Abstract
Access to clean and safe drinking water for all remains a global challenge, mainly for rural populations and areas affected by natural disasters or humanitarian crises. The traditional water quality treatment technologies can work well in laboratory or controlled settings, but they are [...] Read more.
Access to clean and safe drinking water for all remains a global challenge, mainly for rural populations and areas affected by natural disasters or humanitarian crises. The traditional water quality treatment technologies can work well in laboratory or controlled settings, but they are usually applied under conditions unavailable in these types of conditions. Traditional water quality treatment methods are limited by established infrastructure, expensive operating costs, energy requirements, and the ability to perform in-field water treatment. To improve the barriers of traditional water quality treatment technologies, recently developed scientific discoveries of nanozymes, a new class of nanomaterials with enzyme-like catalytic activity, have shown the ability to decentralise water purification. Nanozymes provide a mechanism for water treatment that does not require the infrastructure or the cost of traditional water quality treatment methods. Also, nanozymes possess extremely high catalytic activity, chemical stability, are inexpensive, and are suitable for a variety of contaminants. This review gives a systematic overview of the development of suitable nanozyme-based portable water purification systems. It shows their catalytic mechanisms, the class of nanozymes used, and the design characteristics related to their working use, also highlighting the developments that consider the specific needs of rural contexts, provide rapid responses to disaster areas, and offer drinking water with reliable, simple, and sustainable apparatus. Full article
(This article belongs to the Special Issue Photocatalytic Process for Water Remediation and Water Splitting)
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