Photocatalytic degradation of trichloroethylene in a continuous annular reactor using Cu-doped TiO2 catalysts by sol–gel synthesis

Martínez-Vargas, Daniela Xulú; Rosa, Javier Rivera De la; Lucio–Ortiz, Carlos J.; Hernández‐Ramírez, Aracely; Flores-Escamilla, Gerardo A.; Garcı́a, Carlos D.

doi:10.1016/j.apcatb.2015.05.019

Cited by 58 publications

(12 citation statements)

References 68 publications

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“…The band at 1635 cm −1 corresponds to the O−H bending vibration of absorbed water [36] . The band at 823 cm −1 has been attributed to tetrahedral Ti−O stretching [37] . The peaks at 511 cm −1 and 611 cm −1 are characteristic titanium peaks indicating the lattice vibration of Ti−O−Ti network [38] .…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Layered Double Hydroxides and TiO₂ Supported Metal Nanoparticles for Electrocatalysis

et al. 2022

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In the present work, solution‐phase synthesis was employed to prepare two sets of catalysts with different transition metals as active sites. One set contained Au or Pd supported on TiO2 (Au−TiO2, Pd−TiO2), whereas the other set contained layered double hydroxides (NiFe‐LDH and CuFe‐LDH). The electrocatalytic performance of these composite materials was investigated by cyclic voltammetry (CV) using a model compound 4‐nitrophenol (4‐NP). Composite materials were characterized by various analytical techniques to gain insight into the catalysts active sites. The morphology and structure of the prepared samples were investigated by X‐ray diffraction, attenuated total reflectance Fourier transform infrared, X‐ray photoelectron spectroscopy, transmission scanning electron microscope, and field emission scanning electron microscope. Metal nanoparticles loading on TiO2 was measured by inductively coupled plasma – optical emission spectrometry. CV measurements were performed in acetonitrile solution containing 0.1 m tetrabutylammonium hexafluorophosphate (TBAPF6) and 1 mm 4‐NP. Among all dioxides (Au−TiO2, Pd−TiO2) and hydroxides (NiFe‐LDH and CuFe‐LDH) studied, Pd−TiO2 shows the lowest onset potential (−0.32 V vs. Ag/AgCl) for the electrocatalytic reduction of 4‐NP. This is the first comparative study of such materials for 4‐NP electrocatalysis in aprotic solvent, thus demonstrating the suitability of dioxide and hydroxide based materials as electrocatalysts.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Layered Double Hydroxides and TiO₂ Supported Metal Nanoparticles for Electrocatalysis

et al. 2022

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“…The Pd(0)@CALB and Cu 2 O@CALB hybrids showed the best result, with 85% (112 ppm) of TCE degraded in 5 min ( Table 1, entries 3 and 5), which as far as we know represents the fastest degradation process for TCE catalyzed by these metals [34,35]. The hybrid Cu 3 (PO 4 ) 2 @CALB showed a conversion of 83% (Table 1, entry 6), which shows that the Cu species have a strong influence on this reaction as a catalyst, being in these three cases without the production of toxic substances as by-products (VC).…”

Section: Trichloroethylene (Tce) Degradation Catalyzed By Menps@calb mentioning

confidence: 89%

High Degradation of Trichloroethylene in Water by Nanostructured MeNPs@CALB Biohybrid Catalysts

2020

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In this study, a methodology was developed for the rapid degradation of trichloroethylene (TCE) and 1,1-dichloroethylene (1,1-DCE) in distilled water and room temperature without the production of toxic chlorinated by-products. This process was carried out using bionanohybrids of different metals (Pd, Fe, Cu and Zn) obtained by enzyme–metal coordination called MeNPs@CALB, which present different metal species and nanoparticle sizes. The Cu2O@CALB biohybrid, which contained Cu2O nanoparticles, showed excellent catalytic performance in TCE degradation by removing 95% (>125 ppm) in 10 min using 1.5 g/L of catalyst. On the other hand, in the degradation reaction of 1,1-DCE, Cu2O@CALB eliminated 94% (93 ppm) in 1 min. Cu2O@CALB exhibited excellent stability and recyclability under sustainable conditions, maintaining its effectiveness in more than 90% for three cycles.

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“…Trichloroethylene (TCE) is widely used as a cleaning and degreasing agent in industries. TCE is considered one of the most toxic and carcinogenic VOCs, and it has been easily found in the waste byproducts of chemical processes, dumping grounds, the indoor air and even in groundwater remediation sites [8]. The removal of TCE has been an urgent problem to explore.…”

Section: Introductionmentioning

confidence: 99%

Study on the Inactivation of Pseudomonas sp and the Degradation of Trichloroethylene by Fenton-Like Reaction

Zhong¹,

He²,

Ma³

et al. 2018

Water

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The present work intended to use goethite, one of the main compositions of pipe deposit, to combine with H2O2 to degrade TCE or disinfect drinking water. Goethite exhibited excellent degradation performance for TCE, outstanding inactivation ability for Pseudomonas and the disinfection effect for filter water of water treatment plants. The TCE degradation efficiency could reach 87.4%, while the inactivation efficiency of Pseudomonas and the bacterial mortality rate in filtered water were more than 99.9% in this study. In order to effectively reduce the disinfection by-products (chlorine-resistant bacteria) and conduct permanent disinfection, the Fenton-like and chlorine combined disinfection method was also investigated. Experimental results indicated that the bacteria could be effectively killed by this combined method and the chlorine residual was 0.41m g/L, ensuring sustainable disinfection. This work verified that the pipe deposit from the water distribution network is multifunctional, which is a potential candidate for pollutant removal and sterilization. The results could also offer theoretical support for water quality security in water distribution networks in the future.

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Photocatalytic degradation of trichloroethylene in a continuous annular reactor using Cu-doped TiO2 catalysts by sol–gel synthesis

Cited by 58 publications

References 68 publications

Synthesis of Layered Double Hydroxides and TiO₂ Supported Metal Nanoparticles for Electrocatalysis

Synthesis of Layered Double Hydroxides and TiO₂ Supported Metal Nanoparticles for Electrocatalysis

High Degradation of Trichloroethylene in Water by Nanostructured MeNPs@CALB Biohybrid Catalysts

Study on the Inactivation of Pseudomonas sp and the Degradation of Trichloroethylene by Fenton-Like Reaction

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Photocatalytic degradation of trichloroethylene in a continuous annular reactor using Cu-doped TiO2 catalysts by sol–gel synthesis

Cited by 58 publications

References 68 publications

Synthesis of Layered Double Hydroxides and TiO2 Supported Metal Nanoparticles for Electrocatalysis

Synthesis of Layered Double Hydroxides and TiO2 Supported Metal Nanoparticles for Electrocatalysis

High Degradation of Trichloroethylene in Water by Nanostructured MeNPs@CALB Biohybrid Catalysts

Study on the Inactivation of Pseudomonas sp and the Degradation of Trichloroethylene by Fenton-Like Reaction

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Synthesis of Layered Double Hydroxides and TiO₂ Supported Metal Nanoparticles for Electrocatalysis

Synthesis of Layered Double Hydroxides and TiO₂ Supported Metal Nanoparticles for Electrocatalysis