F. Khan^a, S. Noreen^a, M. S. Youssef^b, A. Jilani^c, H. T. Ali^b, G. Mustafa^d, M. Zahid^a,*

Chalcogenide Letters, Vol.22, No.9, pp. 807-820, 2025, DOI:10.15251/CL.2025.229.807

Abstract In this study Fe doped SnO₂-SnS₂ (FS) and Fe doped SnO₂-SnS₂-polypyrrole (FS-PPY) were synthesized and studied for the methylene blue (MB) egrdation under UV light. The morphological and structural characterizations were carried out by FTIR, SEM-EDX, XRD and XPS. It has been found that FS-PPy degrade methylene blue upto 98 % under optimized conditions as pH =3, dye concentration = 10 ppm, oxidant dose = 2 mM. The Langmuir-Hinshelwood kinetics model fitted well. The optimization was studied using response surface methodology. Scavengers study was carried out to find the active species. Reusability of photocatalyst was evaluated More >

Xiaowang Lu^1,*, Cheng Luo¹, Xinyu Zhu¹, Ziwen Gu¹, Chen Da¹, Junyan Zhou¹, Junchao Qian²

Chalcogenide Letters, Vol.22, No.11, pp. 987-995, 2025, DOI:10.15251/CL.2025.2211.987

Abstract Attapulgite clay-supported CdS composites were synthesized via hydrothermal approach and applied to remove Rhodamine B (RhB). The structural, morphological, and physicochemical properties of the materials were systematically characterized by XRD, TEM, XPS, BET and UV-Vis DRS. The combination of CdS and attapulgite could enhance active site availability and surface area, thereby boosting photocatalytic activity.The optimized CdS/attapulgite composite demonstrated remarkable photocatalytic efficiency under visible-light illumination. In addition, a potential photocatalytic degradation mechanism by the composites was proposed. More >

Surajudeen Sikiru^1,*, Yusuf Olanrewaju Busari^2,3, John Oluwadamilola Olutoki⁴, Mohd Muzamir Mahat¹, Sanusi Yekinni Kolawole⁵

Journal of Polymer Materials, Vol.42, No.1, pp. 1-31, 2025, DOI:10.32604/jpm.2025.058936 - 27 March 2025

Abstract Photocatalysis is a crucial technique for environmental cleanup and renewable energy generation. Polymer-based photocatalysts have attracted interest due to their adaptability, adjustable chemical characteristics, and enhanced light absorption efficiency. Unlike traditional inorganic photocatalysts, we can optimize polymeric systems to enhance photocatalytic efficiency and yield significant advantages in environmental remediation and energy conversion applications. This study talks about the latest developments in polymer-based photocatalysts and how important they are for cleaning water, breaking down pollutants, and making renewable energy through processes like hydrogen production and CO₂ reduction. These materials are proficient in degrading harmful pollutants such as… More >

A. Fatima^a, N. Nadeem^a, Bahaa Saleh^b, Z. A. Rehan^c, S. Noreen^a, Hafiz T. Ali^b, M. Zahid^a,*

Chalcogenide Letters, Vol.21, No.11, pp. 895-915, 2024, DOI:10.15251/CL.2024.2111.895

Abstract The current research work investigated the photocatalytic degradation of dye using polythiophene-based silver-doped zinc sulfide (PT/Ag-ZnS). The ternary composite was synthesized by in-situ chemical oxidation polymerization approach and thoroughly characterized. Maximum photocatalytic activity depicted > 80% for Ag-ZnS and > 94% for PT/Ag-ZnS at pH 7 and 4 respectively at 10 mM oxidant and 30 mg/100 mL catalyst dose, 10 ppm IDC under 90 min. DMSO serves as an effective radical scavenger. The novel polymeric composite exhibits efficient reusability upto five cycles. Pseudo 1^st -order kinetic model was best fitted for PT/Ag-ZnS. Toxicity analysis gave a More >

Abhishek Kumar Patel, Ashlesha P. Kawale, Neeru Sharma, Nishant Shekhar, Subhash Banerjee^*, Arti Srivastava^*

Journal of Polymer Materials, Vol.41, No.2, pp. 69-86, 2024, DOI:10.32604/jpm.2024.052695 - 09 August 2024

Abstract This study aims to synthesize, characterize, and evaluate the photocatalytic efficiency of carboxymethyl cellulose (CMC) wrapped ZnONPs for the degradation of methylene blue (MB) dye under sunlight and also focuses on the effect of varying calcination temperatures on crystallite size of the synthesized ZnONPs@CMC. It focuses on developing biopolymer (CMC) wrapped ZnO nanoparticles (ZnONPs@CMC) at different calcination temperatures. ZnONPs@CMC are synthesized using zinc acetate dihydrate as a precursor under alkaline conditions, followed by adding capping agent CMC at various calcination temperatures ranging from 250°C to 650°C. The nanomaterials are characterized by UV-Vis, FTIR, and powder… More >

Y. L. Ma^*, Y. Y. Tao

Chalcogenide Letters, Vol.20, No.2, pp. 153-164, 2023, DOI:10.15251/CL.2023.202.153

Abstract The key to achieve efficient degradation of organic pollutants lies in improving the separation efficiency of photogenerated electron-hole pairs in photocatalysts. Here, the hydrogen bonds between g-C₃N₄ layers were broken by concentrated acid etching and exfoliation to obtain a more dispersed and lighter g-C₃N₄ nanosheet structure, and then the CdS spherical nanoparticles were dispersed on g-C₃N₄ nanosheets by hydrothermal method. The optimal loading of CdS on g-C₃N₄ nanosheets was determined by testing the degradation performance of the composite photocatalysts with different loading amounts. The degradation performance was tested by simulating sunlight using a 700-800 W xenon lamp More >