Chitosan‑zinc sulfide nanoparticles, characterization and their photocatalytic degradation efficiency for azo dyes
Aisha Aziza b, Nisar Alia b c✉, Nisar Alib c, Adnan Khanb d, Muhammad Bilalb e✉, Sumeet Malikb, Nauman Alib c f✉, Nauman Alib c, Hamayun Khanf
- aKey Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, National & Local Joint Engineering Research Center for Deep Utilization Technology of Rock-salt Resource, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003, China
- bInstitute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa 25120, Pakistan
- cKey Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, National & Local Joint Engineering Research Center for Deep Utilization Technology of Rock-salt Resource, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003, China. Electronic address: nisarali@hyit.edu.cn
- dSchool of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China
- eSchool of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China. Electronic address: bilaluaf@hotmail.com
- fDepartment of Chemistry, Islamia College University, Peshawar 25120, Pakistan
- ✉Corresponding author
Papers open inside SciRah from the original publisher or repository; SciRah never hosts them.
Abstract
Herein, chitosan‑zinc sulfide nanoparticles (CS-ZnS-NPs) were developed as an efficient photocatalyst for the degradation of toxic dyes. The as-synthesized CS-ZnS-NPs were analyzed using XRD, FTIR, SEM, and EDS. The functional groups of CS-ZnS-NPs were validated with FTIR spectroscopy. The SEM envisaged the average particle size as 40 nm, whereas EDS interpreted the compositional analysis of the nanocomposite. XRD analysis illustrated the crystallinity and hexagonal crystal structure of the CS-ZnS-NPs. The photocatalytic efficiency of CS-ZnS-NPs was evaluated using two carcinogenic azo dyes, Acid Brown 98 and Acid Black 234. A UV lamp (254 nm) was used as an irradiation source during the photocatalytic degradation of dyes. At the optimum conditions, the synthesized CS-ZnS-NPs showed 96.7% degradation for Acid Black 234 in 100 min and 92.6% for Acid Brown 98 in 165 min. The degradation phenomena followed pseudo-first-order kinetics. The values of rate constant (k) were 0.01464 and 0.04096 min-1 with correlation coefficient (R2) of 0.98891 and 0.99406 for Acid Brown 98 and Acid Black 234, respectively. The CS-ZnS-NPs was easily recovered and recycled for four successive batches. The results showed that CS-ZnS-NPs are considered as highly productive, cost-effective and promising photocatalyst in degrading pollutants in several consecutive cycles.
TL;DRChitosan‑zinc sulfide nanoparticles (CS-ZnS-NPs) are considered as highly productive, cost-effective and promising photocatalyst in degrading pollutants in several consecutive cycles. (Semantic Scholar)