Chemical Engineering, Materials Science, Environmental Engineering
75
Scopus Publications
Scopus Publications
Bio-Doped Photoactive Hybrid Hydrogel for Synergistic Clean Water Production and Decontamination Qinqin Yang, Zhenzhen Xu, Maohao Zhuang, Rui An, Soon Huat Tan, Zhi Liu, Jianghui Zhao Langmuir, 2026 at 2:00 p.m. and a simultaneous MO degradation efficiency of 93.79% from 8:00 a.m. to 6:00 p.m. This approach provides new perspectives on the sustainable bio-doping of catalytic materials and their use in high-tech applications, such as advanced solar evaporation, photocatalytic hydrogen production, photocatalytic carbon dioxide reduction, and other related areas.
Polypyrrole-based nanocomposites for visible-light photocatalysis: mechanistic insights, structure–performance–stability relationships, and design strategies Al -Ali Hussein, Saib A. Yousif, Soon Huat Tan, Vel Murugan Vadivelu Water Science and Technology, 2025 The persistent contamination of aquatic ecosystems by recalcitrant organic pollutants, including industrial dyes and pharmaceuticals, necessitates the development of efficient and sustainable water treatment technologies. While semiconductor photocatalysis offers a promising route for mineralization, conventional materials such as TiO2, ZnO, and g-C3N4 are severely hindered by their reliance on UV light and rapid electron–hole recombination. Polypyrrole (PPy)-based nanocomposites have emerged as a transformative solution, leveraging PPy's unique conductivity and visible-light absorption to enable highly efficient, solar-driven photocatalysis. Unlike prior surveys that often focus solely on performance, this review systematically connects rational nanocomposite design with fundamental mechanistic insights and, critically, operational stability. The architecture of the catalyst – encompassing core–shell, ternary, and advanced Z-scheme heterojunction systems – constitutes a critical factor governing overall performance. Notably, optimized configurations have demonstrated degradation rates up to fivefold greater than those achieved by more basic designs. However, the literature reveals a crucial trade-off: the most kinetically rapid catalysts often suffer from poor long-term stability, posing a significant barrier to practical deployment. This review explores the intricate relationships between structure, performance, and stability, highlighting evidence-based design principles with direct relevance to the development of scalable water treatment technologies.
Enhancing hexavalent chromium removal from textile effluent with low-cost adsorbent: simulation and a techno-economic study F. Esmati, M. C. Holliday, S. H. Zein, K. J. Jabbar, S. H. Tan, A. Putranto International Journal of Environmental Science and Technology, 2025 This paper simulated hexavalent chromium (Cr(VI)) adsorption using cocoa pod husk biosorbent in a fixed bed column using Aspen Adsorption. This study was designed to show the effectiveness of computational methods in designing, optimising and evaluating the scaled-up adsorption process using low-cost adsorbents. To the best of our knowledge, the economic analysis of Cr(VI) removal using biosorbent adsorption columns with the assistance of Aspen Adsorption and response-surface methodology (RSM) has not been performed previously. Design Expert and RSM were used to optimise and describe the effect of flow rate and initial concentration on breakthrough and saturation times. The breakthrough time was improved by a higher bed height (2.0 m), a wider diameter (2.0 m), and lowering the flow rate (0.010 L/s). The initial concentration had no effect (1.00 mol/L). The predicted breakthrough and saturation time were 29,360 s and 313,351 s, respectively. Two scenarios were economically compared over 20 years. Scenario 1 (1-day breakthrough time) costs $746,585 and Scenario 2 (4-week breakthrough time) costs $1,538,319. This is because Scenario 2 used a taller, wider column which required a greater amount of adsorbent, and 387,873 m3 of water were processed, respectively. Processed water was dependent on the flow rate and breakthrough time. It was concluded that cocoa pod husk could be an efficient adsorbent and the adsorption process can be successfully simulated and optimised. The use of alternative low-cost adsorbents should be encouraged. The economic study showed that simulation and RSM data could successfully be used for economic analysis. Graphical abstract
Application of functionalized carbon-based nanomaterials in membrane separation carbon nanotubes and graphene Chemical Functionalization of Carbon Nanomaterials Chemistry and Applications, 2015
Electrical conductivity properties of MWCNT buckypaper and mwcnt buckypaper/epoxy composites: Effect of loading and pressure Malaysian Journal of Microscopy, 2014
