Abstract
In this paper, the newly prepared ZnO/HZSM-5 nanocomposites were suggested as the promising alternative materials for conventional means of waste water treatment. The combination effect of adsorption–photodegradation for the removal of 4-nitrophenol (4-NPh), as a biorefractory pollutant, occurred successfully when 7 wt.% of ZnO nanoparticles were incorporated in HZSM-5 zeolite. It was found that both the hydrophobicity and size-selectivity of HZSM-5 toward 4-NPh enhanced the adsorption process. The photodegradation of 4-NPh solutions was performed under UV irradiation and the influence of various parameters such as ZnO loading amount, pH dependence and initial concentration of 4-NPh were investigated. The results indicated that during the fixed reaction time (90 min) about 91% total organic carbon of solution, containing 4-NPh (20 mgl − 1 ) was removed at pH = 5. Batch kinetic studies were conducted to evaluate the adsorption–photodegradation process. The pseudo-second-order fit well over the range of reaction time. It can be suggested that encapsulating ZnO clusters in the zeolites is a proper way to inhibit the agglomeration of ZnO nanoparticles and also to retard the recombination of photogenerated electron–hole in photocatalytic activity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
