CeO₂/TiO₂/SiO₂ nanocatalyst for the photocatalytic and sonophotocatalytic degradation of chlorpyrifos

Abstract

A new nanohybrid photocatalyst named cerium (IV) oxide (CeO 2 )/TiO 2 (titania)/silicon dioxide (SiO 2 ) was firstly synthesized employing the coprecipitation technique to elaborate the degradation efficiency of chlorpyrifos (CPS) as a relatively indelible organophosphorus pesticide in deionized water in photocatalytic and sonophotocatalytic processes. The influence of various parameters, including photocatalyst dosage, the CPS pesticide concentration, pH, and irradiation time, was investigated, and the optimal parameters for photodegradation and sonophotodegradation were determined. The activity and the electrical energy of this photocatalyst in the photodegradation and sonophotodegradation processes were compared, and it was revealed that the sonophotocatalytic process was superior to the photocatalytic one (about 15%).Results depicted that it can be employed four times for the photocatalytic reactions with the same yield of CPS degradation. Besides, the CPS degradation efficiency at the optimum conditions was found to be 81.1% and 90.8% for the photo-degradation and sonophotodegradation, respectively. Pursuant to the kinetic studies, the kinetics models that govern these processes are leaner with acceptable accuracy.

A Facile One‐Pot Approach for Synthesis of Graphene‐CdS Nanocomposites and Implementation towards Visible Light Driven Photocatalytic Degradation of Chlorpyrifos (One‐Pot Synthesis of G‐CdS for the degradation of CPY)**

“…All the synthetic approaches that have been identified are related to their own set of disadvantages, like long processing time, high temperature reaction, expensive and hard to scale up and complicated method. [28,30,[50][51][52] In the present study, we have synthesized graphene-CdS nanocomposites with a facile approach at low-temperatures and less reaction time, which is eco-friendly and cost-effective. Further exploration in an extensive literature review indicates that among all the reported literature, our catalyst has served as a better photocatalyst with lower catalyst dosage and less reaction time.…”

“…so this is the problem it can be overcome by combining them photosensitizer. [27][28][29][30][31] The nanocomposites of CdS such as Fe 3 O 4 /CdS/ZnS, CuO/CdS, CdS/ TiO 2 , and CdS/ZnS/BiPO 4 have received special attention as well in photocatalysis for reaching enhanced photocatalytic activities. [27,[32][33][34] Several studies have reported the photocatalytic removal of CPY present in wastewater.…”

“…As per the reports nanoparticles likeFe 3 O 4 /CdSh−ZnS, CeO 2 /TiO 2 /SiO 2 , PAMAM−MoS 2 , Fe−ZnO, TiO 2 −ZnO, etc. so this is the problem it can be overcome by combining them photosensitizer [27–31] . The nanocomposites of CdS such as Fe 3 O 4 /CdS/ZnS, CuO/CdS, CdS/TiO 2 , and CdS/ZnS/BiPO 4 have received special attention as well in photocatalysis for reaching enhanced photocatalytic activities [27,32–34] .…”

Bioresource Polymer Composite for Energy Generation and Storage: Developments and Trends

“…The lightness, ease of processing, ideal mechanical robustness, and simplicity of machining made polymers an interesting backbone resource for different industries. [1][2][3] The properties of PCs can also be modified by fibers and nanoparticles, or they can even be blended with other polymers to create a variety of combinations and variants, depending on the application's requirements. An organic and an inorganic component of a biopolymer have the same molecular unit in their molecular framework.…”

“…The versatility and unique characteristics of polymers and their polymer composites (PCs) motivated the research community to investigate their potential for different practical applications with pre‐defined functions. The lightness, ease of processing, ideal mechanical robustness, and simplicity of machining made polymers an interesting backbone resource for different industries [1–3] . The properties of PCs can also be modified by fibers and nanoparticles, or they can even be blended with other polymers to create a variety of combinations and variants, depending on the application‘s requirements.…”