Bi4O5Br2-based photocatalysts for multifunctional applications: Band engineering, synthesis, and photocatalytic performance Pranshi, Shabnam Sambyal, Aftab Aslam Parwaz Khan, Sourav Gautam, Pankaj Raizada, Chaudhery Mustansar Hussain, Pardeep Singh Journal of Environmental Chemical Engineering, 2026 Photocatalysis is an emerging technology that harnesses solar energy to tackle energy storage and environmental issues. Among various photocatalysts, Bismuth oxybromide (Bi 4 O 5 Br 2 ) received much attention due to its finite visible light efficiency, good electrical conductivity, tunable morphology and optimal bandgap, making it suitable for various applications. Hence, Bismuth oxybromide has undergone optimisation and extensive modification to enhance its photocatalytic activity. The photocatalytic mechanism and crystalline properties are contemplated by XRD and DFT calculations. This review delivers a comprehensive overview of the recent progress of the Bi 4 O 5 Br 2 photocatalyst with its crystallographic structure. The synthesis processes of Bi 4 O 5 Br 2 – based photocatalyst are demonstrated, which include solvothermal, hydrothermal, hydrolysis method, microwave heating method, as well as microemulsion method. Further, we emphasised modification strategies to enhance photocatalytic performance, such as doping, surface defect and heterojunction formation. Subsequently, Bi 4 O 5 Br 2 -based material and its potential application in environmental remediation: photodegradation of dyes, antibiotics, organic pollutants and heavy metal removal and energy conversion, such as photocatalytic water splitting for H₂ evolution and CO₂ reduction. Lastly, we conclude possible challenges and Future Perspectives associated with the Bi 4 O 5 Br 2 -based photocatalyst. • Bi 4 O 5 Br 2 -photocatalyst provides various solutions for environmental issues and energy crises. • Controllable synthesis methods, modification strategies and morphology control for enhancing the photocatalytic activity. • Bi 4 O 5 Br 2 highlights potential for H 2 evolution, CO 2 reduction, degradation of pollutant and energy storage applications. • Reviews the challenges and future perspective for Bi 4 O 5 Br 2 -photocatalyst.
Green synthesized AgNPs embellished on crumpled surface of thiazole modified g-C3N4: A heterocatalyst for the photodegradation of pharmaceutical effluent Itraconazole Sushma Devi, Pooja Dhiman, Arush Sharma, Sourav Gautam, Ajay Kumar Next Materials, 2025 The present work demonstrates the fabrication of thiazole modified g-C 3 N 4 (CN) incorporated with Ag NPs (CTA) photo catalyst. A green method was opted to synthesize Ag nps using seed extract of Sinapis alba. Thiazole modified CN was synthesized using in-situ thermal condensation followed by the incorporation of Ag nps through green route. The photo catalyst was characterized by IR, XRD, SEM/EDS, HR-TEM and XPS. The analysis of optical activities shows narrowing of band gap from 2.68 eV (g-C 3 N 4 ) to 1.98 (for CTA) which attributed due to SPR effect of Ag nps. The catalytic potential of synthesized CTA has been tested for degradation of itraconazole (ITC) a pharmaceutical effluent. The degradation results have shown that 92.5 % of ITC degraded in 120 min. with higher rate constant value i.e. 0.0205 min −1 . Various parameters such as effect of catalysts dosage, pH has been studied. The maximum ITZ degradation by the CTA photocatalyst was observed at 300 mg/L and pH 6. The major radical species responsible for the degradation have been identified as O 2 ●- by radical scavenging experiments. • Green Synthesis of Ag nps Using Sinapis alba seed extract. • Confirmation of Structural Properties via XRD, FTIR, XPS, FESEM, HRTEM. • Photodegradation of pharmaceutical effluent itraconazole (ITZ).
Role of biochar as support material for photo catalytic operation: A review Pooja Dhiman, Manisha Dhiman, Arush Sharma, Manita Thakur, Sourav Gautam, Ajay Kumar Sustainable Chemistry for the Environment, 2024 Compared to the previous decades, presently the generation of household and industrial waste has increased too many folds. The resulting waste has posed a serious management problem. Various techniques are being explored for organic waste management such as biodegradation, microbial degradation, etc. But still, the processes required technological updates to minimize issues related to cost, ease of implementation, etc. Recently, the pyrolysis of such waste in the limited presence of oxygen is in trend. The product so obtained called as “Biochar” offer immense utilization in the domain of environmental pollutants remediation. Biochar offered varieties of beneficial properties, including high rough, porous as well as high specific surfaces area enriched with various active functionalities. These properties are very beneficial while being utilized as a support material in the Nano regime. The present article consolidates the broad area deployment of biochar in diversified fields including adsorption, photo catalysis etc. A special intention has been given to the deployment of biochar in the field of effluent remediation.
Ni-based plasmonic photocatalysts for solar to energy conversion: A review Komal Poonia, Thi Thanh Huyen Nguyen, Pardeep Singh, Tansir Ahamad, Sourbh Thakur, Van-Huy Nguyen, Soo Young Kim, Quyet Van Le, Vishal Chaudhary, Aftab Aslam Parwaz Khan, Rangabhashiyam Selvasembian, Ajay Kumar Mishra, Sourav Gautam, Pankaj Raizada Molecular Catalysis, 2024
