Photocatalytic degradation of dimethoate using LbL fabricated TiO2/polymer hybrid films

Priya, Neela D; Modak, Jayant M.; Trebše, Polonca; Žabar, Romina; Raichur, Ashok M.

doi:10.1016/j.jhazmat.2011.08.030

Cited by 47 publications

(19 citation statements)

References 29 publications

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“…TiO 2 mediated photocatalytic degradation of pesticides has proven to be a promising method to purify the polluntants from the environment. Nano-TiO 2 are capable of degrading dimethoate has been reported [ 53 – 55 ]. However, the degradation pathway of dimethoate has only been reported in a slurry system with TiO 2 [ 56 ].…”

Section: Discussionmentioning

confidence: 99%

Photocatalytic degradation of dimethoate in Bok choy using cerium-doped nano titanium dioxide

Liu

Zhou

et al. 2018

PLoS ONE

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Dimethoate, a systemic insecticide, has been used extensively in vegetable production. Insecticide residues in treated vegetables, however, pose a potential risk to consumers. Photocatalytic degradation is a new alternative to managing pesticide residues. In this study, the degradation of dimethoate in Bok choy was investigated under the field conditions using cerium-doped nano titanium dioxide (TiO2/Ce) hydrosol as a photocatalyst. The results show that TiO2/Ce hydrosol can accelerate the degradation of dimethoate in Bok choy. Specifically, the application of TiO2/Ce hydrosol significantly increased the reactive oxygen species (ROS) contents in the treated Bok choy, which speeds up the degradation of dimethoate. Ultra-performance liquid chromatography coupled with mass spectrometry (UPLC-MS) analysis detected three major degradation products, including omethoate, O,O,S-trimethyl thiophosphorothioate, and 1,2-Bis (acetyl-N-methyl-) methane disulfide. Two potential photodegradation pathways have been proposed based on the intermediate products. To understand the relationship between photodegradation and the molecular structure of target insecticides, we investigated the bond length, Mulliken atomic charge and frontier electron density of dimethoate using ab initio quantum analysis. These results suggest the P = S, P-S and S-C of dimethoate are the initiation sites for the photocatalytic reaction in Bok choy, which is consistent with our empirical data.

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Section: Discussionmentioning

confidence: 99%

Photocatalytic degradation of dimethoate in Bok choy using cerium-doped nano titanium dioxide

Liu

Zhou

et al. 2018

PLoS ONE

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“…Although the LbL‐based thin films have been successfully applied to photocatalysis, little has been reported on LbL assembly of TiO 2 /graphene film catalyst for the enhancement of photoactivity so far. Moreover, few reported separation‐free film catalysts, , were all evaluated under magnetic agitating conditions by using a small magnetic pellet to the best of our knowledge while in practice, mechanical agitation with a large agitator is required for scaled‐up production. The movement of agitator across the reactor adds additional constraints on the arrangement of the film catalysts in the reactor.…”

Section: Introductionmentioning

confidence: 99%

“…The movement of agitator across the reactor adds additional constraints on the arrangement of the film catalysts in the reactor. In addition, the hindrance of film catalysts vertically fixed against the circulating flow may lead to problems such as poor agitation and waste of energy. Therefore, developing a new strategy to meet the above challenges is indispensable for realizing a continuous photocatalysis suitable for scaled‐up production.…”

Section: Introductionmentioning

confidence: 99%

Continuous Photocatalysis Based on Layer‐by‐Layer Assembly of Separation‐Free TiO₂/Reduced Graphene Oxide Film Catalysts with Increased Charge Transfer and Active Site

Zhang

Sun

et al. 2019

Eur J Inorg Chem

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Although photodegradation is the most widely studied method for the purification of water, the challenges for the post-separation of catalysts from water make the technique unsuitable for practical applications. In this study, separation-free TiO 2 /reduced graphene oxide (rGO) multilayer films were first prepared through layer-by-layer (LbL) assembly of TiO 2 and graphene oxide (GO) on quartz slides, followed by a reduction of the assembled GO to rGO. For a proof-of-concept demonstration of novel continuous photocatalysis with potential for scaled-up production, these quartz slides with TiO 2 /rGO film catalysts were further assembled into slide arrays in a homemade rectangular quartz reactor and a model pollutant Rhodamine B (RhB) solution was circularly pumped over the slide [a]

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“…Dimethoate (DM), one of the most popular organophosphorus insecticides, is frequently used against a wide range of insects in agriculture and for housefly control due to its high effectiveness (Priya et al, ; Ayed‐Boussema et al, ; Guo et al, ). The residue of DM and its analog have been found in soil, crops, water, and foods, including cow's milk (Amara et al, ; Soler et al, ; Feng et al, ).…”

Section: Introductionmentioning

confidence: 99%

Synergistic toxicity of zno nanoparticles and dimethoate in mice: Enhancing their biodistribution by synergistic binding of serum albumin and dimethoate to zno nanoparticles

Yan

Guo

et al. 2016

Environmental Toxicology

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The extensive applications of ZnO nanoparticles (nano ZnO) and dimethoate (DM) have increased the risk of humans' co-exposure to nano ZnO and DM. Here, we report the synergistic effect of nano ZnO and DM on their biodistribution and subacute toxicity in mice. Nano ZnO and DM had a synergistic toxicity in mice. In contrast, bulk ZnO and DM did not cause an obvious synergistic toxicity in mice. Although nano ZnO was low toxic to mice, coexposure to nano ZnO and DM significantly enhanced DM-induced oxidative damage in the liver. Coadministration of nano ZnO with DM significantly increased Zn accumulation by 30.9 ± 1.9% and DM accumulation by 45.6 ± 2.2% in the liver, respectively. The increased accumulations of DM and Zn in the liver reduced its cholinesterase activity from 5.65 ± 0.32 to 4.37 ± 0.49 U/mg protein and induced hepatic oxidative stress. Nano ZnO had 3-fold or 2.4-fold higher binding capability for serum albumin or DM, respectively, than bulk ZnO. In addition, serum albumin significantly increased the binding capability of nano ZnO for DM by approximately four times via the interaction of serum albumin and DM. The uptake of serum albumin- and DM-bound nano ZnO by the macrophages significantly increased DM accumulation in mice. Serum albumins play an important role in the synergistic toxicity of nano ZnO and DM. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 1202-1212, 2017.

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Photocatalytic degradation of dimethoate using LbL fabricated TiO2/polymer hybrid films

Cited by 47 publications

References 29 publications

Photocatalytic degradation of dimethoate in Bok choy using cerium-doped nano titanium dioxide

Photocatalytic degradation of dimethoate in Bok choy using cerium-doped nano titanium dioxide

Continuous Photocatalysis Based on Layer‐by‐Layer Assembly of Separation‐Free TiO₂/Reduced Graphene Oxide Film Catalysts with Increased Charge Transfer and Active Site

Synergistic toxicity of zno nanoparticles and dimethoate in mice: Enhancing their biodistribution by synergistic binding of serum albumin and dimethoate to zno nanoparticles

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Photocatalytic degradation of dimethoate using LbL fabricated TiO2/polymer hybrid films

Cited by 47 publications

References 29 publications

Photocatalytic degradation of dimethoate in Bok choy using cerium-doped nano titanium dioxide

Photocatalytic degradation of dimethoate in Bok choy using cerium-doped nano titanium dioxide

Continuous Photocatalysis Based on Layer‐by‐Layer Assembly of Separation‐Free TiO2/Reduced Graphene Oxide Film Catalysts with Increased Charge Transfer and Active Site

Synergistic toxicity of zno nanoparticles and dimethoate in mice: Enhancing their biodistribution by synergistic binding of serum albumin and dimethoate to zno nanoparticles

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Product

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Continuous Photocatalysis Based on Layer‐by‐Layer Assembly of Separation‐Free TiO₂/Reduced Graphene Oxide Film Catalysts with Increased Charge Transfer and Active Site