Photocatalytic degradation of glyphosate using Ce/N co-doped TiO2 with oyster shell powder as carrier under the simulated fluorescent lamp

Abstract

Glyphosate is currently one of the most used organophosphorus herbicides in the world and its accumulation and translocation in soil and wave causes environmental pollution and biological health problems. A new approach to the problem is provided by the preparation of cerium and nitrogen co-doped titanium dioxide composite nano-photocatalysts loaded on modified oyster shell powder (CeNT@Oys) by a simple hydrothermal synthesis. The physicochemical and optoelectronic properties are analyzed using SEM, BET, XRD, Raman, FTIR, UV-vis DRS, XPS characterization techniques and a range of photoelectrochemical techniques. The results show that the addition of modified oyster shell powder increases its specific surface area, while Ce-N-TiO2 is an anatase crystal composed of Ce doped in the form of interstitial and surface, interstitial form of N, and the co-doping of Ce and N elements gives it the property of being excited by visible light. The photocatalytic activity of the different catalysts was evaluated by degrading 50 mg/L glyphosate solution under simulated sunlight. The catalyst was determined to be reusable by five repeated degradation experiments. Based on quenching experiments and the electron paramagnetic resonance tests, the effective active species of glyphosate degraded by the catalyst was determined and the mechanism of glyphosate degradation by photocatalyst was proposed. Finally, the degradation pathway for the photocatalytic degradation of PMG by CeNT@Oys was determined by HPLC-MS/MS determine of the intermediate products.

Tailoring Vanadium-Based Magnetic Catalyst by In Situ Encapsulation of Tungsten Disulfide and Applications in Abatement of Multiple Pollutants

“…The WV-MNPs were used for the antimicrobial activity of the Escherichia coli bacterial strain and to find out the inevitable photodegradation of CR as well as glyphosate. In terms of performance, the newly designed photocatalyst outperformed various previously reported catalysts applied for the degradation of targeted pollutants. ,, …”

“…In terms of performance, the newly designed photocatalyst outperformed various previously reported catalysts applied for the degradation of targeted pollutants. 25,33,34 2. EXPERIMENTAL SECTION 2.1.…”

“…Photocatalysis provides renewable energy resources and environmental remediation without causing any threats to the ecosystem as most of the degradation products are nonhazardous . For example, in the case of glyphosate degradation, an oyster shell loaded with the cerium codoped nitrogen and titanium oxide photocatalyst was designed by Zhang et al to mitigate its concentration, and they succeeded in achieving a percentage degradation of approximately 80% . Due to their distinctive nature, transition metals are also widely used to control bacterial growth and environmental remediation.…”

“… 24 For example, in the case of glyphosate degradation, an oyster shell loaded with the cerium codoped nitrogen and titanium oxide photocatalyst was designed by Zhang et al to mitigate its concentration, and they succeeded in achieving a percentage degradation of approximately 80%. 25 Due to their distinctive nature, transition metals are also widely used to control bacterial growth and environmental remediation. The size of a pore cell is greater than that of metal ions, so ions cannot cross the cell membrane but change the path with a lower inhibition rate using nanoparticles.…”