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

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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Fast Degradation of Bisphenol A in Water by Nanostructured CuNPs@CALB Biohybrid Catalysts

Nanomaterials ◽

10.3390/nano10010007 ◽

2019 ◽

Vol 10 (1) ◽

pp. 7 ◽

Cited By ~ 2

Author(s):

Noelia Losada-Garcia ◽

Alba Rodriguez-Otero ◽

Jose M. Palomo

Keyword(s):

Aqueous Solution ◽

Hydrogen Peroxide ◽

Bisphenol A ◽

Copper Nanoparticles ◽

Room Temperature ◽

Catalytic Performance ◽

Cu2o Nanoparticles ◽

Nanoparticle Sizes ◽

Excellent Catalytic Performance ◽

Excellent Stability

Copper nanoparticles–enzyme biohybrid is a promising material for the remediation of contaminated waters, but its function is influenced by its effect on degradation organic pollutants. This study is the first investigation into the fast degradation of a high amount of Bisphenol A (BPA) in water at neutral pH and room temperature. Four different CuNPs biohybrids with different cu species and nanoparticle sizes were used as catalysts. The biohybrid CuNPs@CALB-3, which contained Cu2O nanoparticles of around 10 nm size, showed excellent catalytic performance removing >95% BPA content (45 ppm) in an aqueous solution in 20 min in the presence of hydrogen peroxide at pH 8 using 1.5 g/L of a catalyst. The catalyst showed excellent stability and recyclability at these conditions.

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Catalysis of Organic Pollutants Abatement Based on Pt-Decorated Ag@Cu2O Heterostructures

Molecules ◽

10.3390/molecules24152721 ◽

2019 ◽

Vol 24 (15) ◽

pp. 2721

Author(s):

Xiaolong Zhang ◽

Bingbing Han ◽

Yaxin Wang ◽

Yang Liu ◽

Lei Chen ◽

...

Keyword(s):

Catalytic Reduction ◽

Structural Characteristics ◽

Organic Pollutant ◽

Pt Nanoparticles ◽

Catalytic Performance ◽

Pt Nanoparticle ◽

Local Surface ◽

Local Surface Plasmon Resonance ◽

Cu2o Nanoparticles ◽

Excellent Catalytic Performance

Pt-decorated Ag@Cu2O heterostructures were successfully synthesized using a simple and convenient method. The Pt nanoparticle density on the Ag@Cu2O can be controlled by changing the concentration of the Pt precursor. The synthesized Ag@Cu2O–Pt nanoparticles exhibited excellent catalytic performance, which was greatly affected by changes in the Ag@Cu2O–Pt structure. To optimize the material’s properties, the synthesized Ag@Cu2O–Pt nanoparticles were used to catalyze toxic pollutants and methyl orange (MO), and nontoxic products were obtained by catalytic reduction. The Pt-decorated Ag@Cu2O nanoparticles showed excellent catalytic activity, which significantly decreased the pollutant concentration when the nanoparticles were used for catalytic reduction. The redistribution of charge transfer is the nanoparticles’ main contribution to the catalytic degradation of an organic pollutant. This Pt-decorated Ag@Cu2O material has unique optical and structural characteristics that make it suitable for photocatalysis, local surface plasmon resonance, and peroxide catalysis.

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Effect of Steam Treatment on Catalytic Performance of La2O3-HZSM-5 for Methylation of Toluene with Methanol

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.629.381 ◽

2012 ◽

Vol 629 ◽

pp. 381-385 ◽

Cited By ~ 2

Author(s):

Jun Hui Li ◽

Zhong Hua Hu ◽

Ya Nan Wang ◽

Hao Xiang ◽

Zhi Rong Zhu

Keyword(s):

High Selectivity ◽

Fixed Bed ◽

Shape Selectivity ◽

Catalytic Performance ◽

Acid Sites ◽

Fixed Bed Reactor ◽

Steam Treatment ◽

By Products ◽

Poor Stability ◽

Excellent Catalytic Performance

Methylation of toluene with methanol to synthesize p-Xylene was performed in a fixed-bed reactor. HZSM-5 zeolite as a catalyst was prepared by modification with La2O3. In addition, effect of steam treatment for La2O3-modified HZSM-5 on its catalytic performance was investigated as well. The properties of as-prepared catalysts were characterized by XRD, BET and NH3-TPD. The results indicate that modification with La2O3can narrow the size of HZSM-5 channel effectively. And more than 90% selectivity of p-Xylene is obtained over HZSM-5 with loading of 24% and 30% La2O3. However, above La2O3-modified HZSM-5 with high-selectivity exhibit a poor stability for time on-stream of the methylation reaction. Steam treatment of La2O3-modified HZSM-5 can improve its stability and shape selectivity, decreasing by-products. These effects can be attributed to distortion & narrowing of HZSM-5 channel and reduction of HZSM-5 strong Bronsted acid sites during steam treatment. As a result, the excellent catalytic performance is obtained over 24.0% La2O3-modified HZSM-5 by steam treatment at 773 K for 1.0 h, being 23% conversion of toluene, 93% selectivity of p-Xylene during time on-stream.

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A fast and mild method to prepare d-Ti3C2Tx/ZnO composites at room temperature with excellent catalytic performance

Applied Surface Science ◽

10.1016/j.apsusc.2021.149863 ◽

2021 ◽

Vol 558 ◽

pp. 149863

Author(s):

Jing Lv ◽

Libo Zhang ◽

Li Zhu ◽

Feng Wang ◽

Yan Zhang ◽

...

Keyword(s):

Room Temperature ◽

Catalytic Performance ◽

Excellent Catalytic Performance

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Engineering CuOx–ZrO2–CeO2 nanocatalysts with abundant surface Cu species and oxygen vacancies toward high catalytic performance in CO oxidation and 4-nitrophenol reduction

CrystEngComm ◽

10.1039/d0ce00588f ◽

2020 ◽

Vol 22 (23) ◽

pp. 4005-4013 ◽

Cited By ~ 1

Author(s):

Baolin Liu ◽

Yizhao Li ◽

Shaojun Qing ◽

Kun Wang ◽

Jing Xie ◽

...

Keyword(s):

Co Oxidation ◽

Oxygen Vacancies ◽

Catalytic Performance ◽

Solvent Free ◽

Metal Species ◽

Synthetic Strategy ◽

Nitrophenol Reduction ◽

Active Metal ◽

Excellent Catalytic Performance

CuOx–ZrO2–CeO2 nanocrystalline catalysts were designed and synthesized by a solvent-free synthetic strategy, and exhibited excellent catalytic performance owing to the increased oxygen vacancies and better dispersed active metal species.

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A controlled alkaline treatment of Al-SBA-15: a facile route to adjust the chemical composition and synthesize an ordered mesoporous carbon material, CMK-3, possessing strong pressure resistant capability

New Journal of Chemistry ◽

10.1039/c7nj01914a ◽

2017 ◽

Vol 41 (15) ◽

pp. 7634-7642 ◽

Cited By ~ 5

Author(s):

Sen Lin ◽

Ruiyun Liu ◽

Niping Li ◽

Peng Guo ◽

Lei Shi

Keyword(s):

Chemical Composition ◽

Carbon Material ◽

Mesoporous Carbon ◽

Alkaline Treatment ◽

Catalytic Performance ◽

Ordered Mesoporous ◽

Mesoporous Carbon Material ◽

Degradation Reaction ◽

Excellent Catalytic Performance ◽

Facile Route

Alkaline-treated Al-SBA-15 exhibits excellent catalytic performance in the LDPE degradation reaction and its replica, CMK-3, has excellent structural stability.

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