Volume 14, Issue 56, 2025 (October – December)
Review Article
Green Catalysis in Environmental Remediation: A Comprehensive Review of Current Trends
Y. B. Nagamani and K. Chandra Rekha
Keywords: Green catalysis, environmental remediation, photocatalysis, nanocatalysis, biocatalysis, sustainable chemistry
DOI:10.37273/chesci.cs212056091
Full Text – PDF
Abstract
The rapid industrialization and expansion of human activity have contributed to severe environmental contamination, including the accumulation of toxic pollutants in water, air, and soil. Conventional remediation strategies, while effective to some extent, often entail energy-intensive procedures and generate secondary waste. An effective, sustainable, and environmentally responsible method for tackling these issues is green catalysis, which is based on the ideas of green chemistry. This review covers photocatalysis, heterogeneous catalysis, nanocatalysis, and biocatalysis and provides an overview of current developments in green catalysis for environmental remediation. This review includes sustainable synthesis approaches and catalyst design strategies. The challenges of high cost, catalyst deactivation, and scalability are highlighted alongside future perspectives such as AI-driven catalyst optimization, solar-driven catalysis, and integration with circular economy concepts.
References
[1] Z. Zhao, T. Wu and M. Li. Catalyst deactivation and regeneration in environmental catalysis: A review, Catalysis Science and Technology, 2019, 9 (10): 2440–2460.
[2] R.A. Sheldon and J.M. Woodley. Role of biocatalysis in sustainable chemistry. Chemical Reviews, 2018, 118 (2): 801–838.
[3] G. Zhang, H. Zhang, Y. Wang and X. Guo. Visible-light-driven photocatalytic degradation of pharmaceutical and personal care products over g-C₃N₄-based catalysts. Applied Catalysis B, 2016, 180: 521–529.
[4] T. Kawahara, Y. Konishi, H. Tada, N. Tohge, J. Nishii and S. Ito. A visible light responsive titanium dioxide photocatalyst obtained by action of surface plasmon resonance. Applied Catalysis A: General, 2018, 356 (1): 154–158.
[5] Z. Boudechiche, S. Bouzid, Z. Sadaoui, A. Belarbi and A. Bouguelia. Enhanced visible light photocatalytic activity of Ag–TiO₂ nanocomposites for degradation of organic pollutants. Catalysts, 2024, 14 (5): 624.
[6] A. G. B. de Lima, C.P. de Moura, M.T. Tavares, E.D. Pereira and C.S. Gomes. Copper-doped TiO₂ photocatalysts with enhanced visible light activity and antibacterial performance. ACS Omega, 2024, 9 (16): 14567–14576.
[7] A. Mancuso, L. Prieto-Rodriguez and P. Fernandez-Ibanez. Iron-doped TiO₂ photocatalysts for environmental remediation: A review. Applied Catalysis B: Environmental, 2021, 282: 119570.
[8] A. Ghorbanpour. Structural and photocatalytic properties of Fe-doped TiO₂ nanomaterials: A review. Ceramics International, 2019, 45 (12): 14403–14419.
[9] S. Rajput, R. Sharma and J. Singh. N-doped carbon–TiO₂ composites: Recent advances in synthesis, properties, and photocatalytic applications. Journal of Environmental Chemical Engineering, 2024, 12(2): 111017.
[10] J. Chen, H. Wang and L. Zhang. Tailoring sulfur doping in TiO₂ for improved visible light photocatalysis: Mechanism and performance. Journal of Photochemistry and Photobiology A: Chemistry, 2023, 439:114510.
[11] X. Li, J. Xiong and Z. Chen. g-C₃N₄/TiO₂-based heterojunction photocatalysts: Synthesis strategies and environmental applications. Chemical Engineering Journal, 2021, 420: 129893.
[12] Y. Zhang and Q. Wang. S-scheme g-C₃N₄/TiO₂ photocatalysts for visible-light-driven degradation of organic pollutants. Applied Surface Science, 2022, 596: 153573.
[13] S. Kment, F. Riboni, S. Pausova, L.Wang, H. Han and R. Zboril. Plasmonic photocatalysts based on noble metal–TiO₂ nanostructures for solar energy conversion. Advanced Materials, 2023, 35 (10): 2208146.
[14] J. Luo, H. Liu and D. Li. Tailoring Au–TiO₂ plasmonic interfaces for visible-light photocatalysis: Recent advances and mechanistic insights. ACS Nano, 2025, 19 (4): 5120–5132.
[15] P. Wang, H. Guo and S. Sun. Recent advances and mechanism of plasmonic metal–semiconductor photocatalysis. RSC Advances, 2024, 14 (23): 13755–13769.
[16] M. Liu, G. Chen, L. Xu, Z. He and Y. Ye. Environmental remediation approaches by nanoscale zero-valent iron (nZVI) based on its reductivity: A review. RSC Advances, 2024, 14 (33): 21118–21138.
[17] W. Yan, H.L. Lien, B.E. Koel and W.X. Zhang. Iron nanoparticles for environmental clean-up: Recent developments and future outlook. Environmental Science: Processes and Impacts, 2013, 15 (1): 63–77.
[18] Y. Deng, J. Chen, J. Feng and K.L. Yeung. Carbon nanotubes and graphene as excellent supports for nanocatalysts. Catalysis Today, 2016, 261: 17–29.
[19] S. Royer and D. Duprez. Catalytic oxidation of carbon monoxide over transition metal oxides. ChemCatChem, 2011, 3 (1): 24–65.
[20] M. A. Hassaan. Photocatalytic degradation mechanisms of organic pollutants: A review. Journal of Environmental Management, 2023, 345: 118291.
[21] S. Beil. Recent developments in photocatalytic degradation processes for water purification. Environmental Chemistry Letters, 2024, 22: 1547–1562.
[22] R. Ganesan, J. Kim, C. Lee and J. Park. Nanocatalysis for green synthesis: Opportunities and challenges. Chemical Reviews, 2015, 115 (2): 1462–1485.
[23] A. D. Baruwa, P. Sharma, R. Singh and S. Patel. Nanocatalysis in environmental remediation: Trends and sustainability. Journal of Environmental Chemical Engineering, 2025, 13(4): 110942.
[24] M. Sohail, W. Raza and M. Akhtar. Advances and challenges in industrial biocatalysis: Enzyme engineering and sustainability. Biotechnology Advances, 2024, 67: 108239.
[25] X. Zhou, J. Fang and Y. Chen. Biocatalytic transformations for environmental applications: A critical review. Bioresource Technology, 2024, 307:123195
[26] X. Liu, T. Zhang and H. Zhao. Recent progress in heterogeneous catalysis for green chemistry applications. Catalysis Reviews, 2024, 66 (3): 255–284.
[27] V. I. Parvulescu, I. Balint and P. Grange. Heterogeneous catalysis for sustainable processes. Chemical Society Reviews, 2020, 49 (5): 1642–1666.
[28] X. Wang, Y. Li, J. Zhang and L. Chen. Life cycle assessment of CO₂ conversion via photocatalytic reactions. Journal of Cleaner Production, 2024, 420: 137685.
[29] T. Pesqueira, M. Ríos and E. López. Environmental impact assessment of TiO₂ and GO-TiO₂ photocatalysts. Journal of Environmental Management, 2024, 342: 118285.
[30] F. Gowland, R. Smith and L. Johnson. Scaling up photocatalytic water purification using UV-LED and TiO₂ catalysts. Environments, 2024, 11 (6): 114.
[31] M. Rahman, S. Ahmed and T. Khan. Techno-economic and life cycle analysis of nano-enhanced solar fluidized bed systems. Journal of Environmental Chemical Engineering, 2025, 13: 110584.
[32] S. Becker, C. Müller and A. Schmid. Comparative life cycle assessment of chemical and biocatalytic synthesis of 2′3′-cGAMP. Green Chemistry, 2023, 25 (5): 1890–1902.
[33] Y. Liang, H. Chen and P. Wang. Sustainable production of biochemicals: Life cycle assessment insights. ACS Sustainable Chemistry & Engineering, 2023, 11: 10245–10258.
[34] M. Gao, J. Li and X. Wang. Techno-economic analysis of CO₂ electrolysis systems. Energy and Fuels, 2023, 37: 14235–14247.
[35] D. Anekwe, U. Okoro and J. Nwankwo. Heterogeneous catalysis for renewable energy: Economic perspectives. Applied Catalysis B: Environmental, 2025, 319: 122285.
[36] J.F.J.R. Pesqueira, M.F.R. Pereira and A.M.T. Silv. Carbon-based composites in advanced wastewater treatment: A life cycle assessment of TiO₂ and GO-TiO₂ solar photocatalysis. Journal of Cleaner Production, 2024, 444: 140845.
[37] D.C.A. Gowland, N. Robertson and E. Chatzisymeon. Life cycle assessment of immobilised and slurry photocatalytic systems for removal of natural organic matter in water. Environments, 2024, 11 (6): 114.
[38] N. Bhargava, A. Patel and P. Singh. Techno-economic assessment of integrated photochemical-biological wastewater treatment systems. Journal of Environmental Management, 2023, 345:118679.
[39] K.F. Ngulube, P. Ncube and S.D. Mhlanga. Integrating techno-economic and sustainability assessment of magnetite-based photocatalysts for water treatment: A review. Environmental Science and Pollution Research, 2024, 31 (22): 48971-48989.
[40] S. Ahmed, M. Ahmad, B.L. Swami and S. Ikram. A review on plants extract mediated synthesis of silver nanoparticles for antimicrobial applications: A green expertise. Journal of Advanced Research, 2016, 7 (1): 17–28.
[41] V.K. Sharma, R.A. Yngard and Y. Lin. Silver nanoparticles: Green synthesis and their antimicrobial activities. Advances in Colloid and Interface Science, 2019, 145: 83–96.
[42] X. Tan, Y. Liu, G. Zeng, X. Wang, X. Hu, Y. Gu and Z. Yang. Application of biochar for the removal of pollutants from aqueous solutions. Chemosphere, 2015, 125: 70–85.
[43] X. Zhang, Y. Zhong and L. Wang. Biochar-supported nanomaterials for environmental remediation: A review. Critical Reviews in Environmental Science and Technology, 2019, 49 (22): 2205–2251.
[44] J. Lehmann and S. Joseph, (Eds.). Biochar for environmental management: Science, technology and implementation (2nd ed.). 2015.
[45] Y. Zhou, Y. Zhang, M. Lin and X. Wang. Graphene/TiO₂ nanocomposites for photocatalysis: Tunable properties and enhanced performance. Applied Catalysis B: Environmental, 2015, 164: 333–341.
[46] M. Aresta, A. Dibenedetto and A. Angelini. Catalysis for the valorization of exhaust carbon: From CO₂ to chemicals, materials and fuels, Technological and economic aspects. Chemical Reviews, 2014, 114 (3): 1709–1742.
[47] J. Wen, X. Li, H. Li, S. Ma, K. He, Y. Xu and X. Fu. Photocatalysis fundamentals and surface modification of TiO₂ nanomaterials. Chinese Journal of Catalysis, 2017, 36 (12): 2049–2070.
[48] A. Blanco, M.C. Monte, C. Campano, A. Balea, N. Merayo and C. Negro. Nanocellulose for industrial use: Cellulose nanofibers (CNF), cellulose nanocrystals (CNC), and bacterial cellulose (BC). Industrial Crops and Products, 2019, 132: 574–590.
[49] W.J. Liu, H. Jiang and Q. Yu. Development of biochar-based functional materials: Toward a sustainable platform carbon material. Chemical Reviews, 2015, 115 (22): 12251–12285.
[50] H. Zhang, J. Wei and J. Shi. Recent advances in environmental applications of green catalysis. Applied Catalysis B: Environmental, 2020, 277: 119228.
[51] C. Hu, Y. Lan, J. Qu, X. Hu and A. Wang. Ag/AgBr/TiO₂ visible light photocatalyst for destruction of azodyes and bacteria. Journal of Physical Chemistry B, 2011, 110 (9): 4066–4072.
[52] K.T. Butler, D.W. Davies, H. Cartwright, O. Isayev and A. Walsh. Machine learning for molecular and materials science. Nature, 2018, 559 (7715): 547–555.
[53] B. Sanchez-Lengeling and A. Aspuru-Guzik. Inverse molecular design using machine learning: Generative models for matter engineering. Science, 2018, 361 (6400): 360–365.
[54] R.A. Sheldon. Green chemistry and catalysis: An introduction. Green Chemistry, 2016, 18 (13): 3180–3183.
[55] P.T. Anastas and J.B. Zimmerman. The United Nations sustainability goals: How can sustainable chemistry contribute? Current Opinion in Green and Sustainable Chemistry, 2018, 13: 150–153.
[56] K. Mori, H. Yamashita and M. Anpo. Noble metal nanoparticles as highly efficient catalysts: A bridge between heterogeneous and homogeneous catalysis. Chemical Society Reviews, 2021, 50 (21): 12344–12367.
[57] R. Singh and K.E. Lee. Biocatalysis for environmental applications: A review. Journal of Environmental Chemical Engineering, 2021, 9 (5): 105671.
[58] W.J. Ong, L.L. Tan, S.P. Chai, S.T. Yong and A.R. Mohamed. Self-assembly of nitrogen-doped TiO₂ with graphene for visible-light-driven photocatalysis: Insight into the role of nitrogen. Chemical Communications, 2018, 54: 11296–11310.