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Preparation of Cu/ZnO/Al

Hui FAN, Huayan ZHENG, Zhong LI

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 445-451 doi: 10.1007/s11705-010-0521-x

Abstract: Cu/ZnO/Al O catalysts with Cu/Zn/Al ratios of 6/3/1 were precipitated and aged by conventional and microwaveirradiation on the catalytic performance was investigated to optimize the preparing condition of Cu/ZnO

Keywords： microwave irradiation     precipitation temperature     aging temperature     methanol synthesis     Cu/ZnO/Al2<    

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Photocatalytic activity of ZnO films with micro-grid structure

Chunzhi LI , Wenwen WANG , Junying ZHANG , Hailing ZHU , Weiwei ZHANG , Tianmin WANG ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3,   Pages 289-293 doi: 10.1007/s11783-009-0034-3

Abstract: A layer of zinc oxide (ZnO) micro-grid was deposited on the surface of ZnO film using the DC reactiveThe micro-grid ZnO has a lower specular reflection and a higher diffuse reflection, allowing incidentPhotocatalytic degradation experiments on methylene blue using both ZnO micro-grid and ordinary filmshowed that the ZnO micro-grid has better photocatalytic properties than ordinary film.The ZnO micro-grid enhanced the photocatalytic efficiency of ZnO film by 28% with a degradation time

Keywords： Photocatalysis     ZnO micro-grid     polystyrene latex spheres template     diffuse reflection    

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A simple and cheap method for preparation of coupled ZrO2/ZnO with high photocatalytic activities

WANG Zheng, ZHANG Bingru, LI Fengting

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 4,   Pages 454-458 doi: 10.1007/s11783-007-0072-7

Abstract: Coupled ZrO/ZnO photocatalyst was prepared with a simple precipitation method with cheap raw

Keywords： objective     ZrO/ZnO photocatalyst     photocatalyst     precipitation     degradation    

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Cystine-assisted accumulation of gold nanoparticles on ZnO to construct a sensitive surface-enhanced

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 15-23 doi: 10.1007/s11705-022-2177-8

Abstract: Morphological analysis revealed that the obtained ZnO/Au/cystine composite not only had a higher metalCompared with ZnO/Au, the ZnO/Au/cystine substrate displayed a 40-fold enhancement in the Raman signalFinally, ZnO/Au/cystine displayed excellent performance toward crystal violet and methylene blue in a

Keywords： biomineralization     cystine     semiconductor/metal composite     SERS detection     Raman detection    

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Reconstruction of Cu–ZnO catalyst by organic acid and deactivation mechanism in liquid-phase hydrogenation

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1311-1319 doi: 10.1007/s11705-022-2281-9

Abstract: According to the characterization results of the fresh Cu–ZnO and reconstructed Cu–ZnO, three differentforms of ZnO were suggested to be presented on the catalysts: ZnO having strong interaction with Cuspecies, ZnO that weakly interacted with Cu species and isolated ZnO.+, while the latter two forms of ZnO took the main responsibility for the deactivation of Cu–ZnOThe reconstruction of the Cu–ZnO catalyst by the organic acid treatment method resulted in a new Cu–ZnO

Keywords： liquid phase     hydrogenation     Cu–ZnO     deactivation mechanism     1     4-butanediol     diester    

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Reactive adsorption desulfurization over a Ni/ZnO adsorbent prepared by homogeneous precipitation

Aihua KONG, Yanyu WEI, Yonghong LI

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 2,   Pages 170-176 doi: 10.1007/s11705-013-1322-9

Abstract: A high-performance Ni/ZnO adsorbent was prepared by homogeneous precipitation using urea hydrolysis and

Keywords： nickel     reactive adsorption     desulfurization     thiophene    

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Photocatalytic degradation of methyl orange using ZnO/TiO composites

Ming GE , Changsheng GUO , Xingwang ZHU , Lili MA , Wei HU , Yuqiu WANG , Zhenan HAN ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3,   Pages 271-280 doi: 10.1007/s11783-009-0035-2

Abstract: ZnO/TiO composites were synthesized by using the solvothermal method and ultrasonic precipitation followed

Keywords： photocatalytic degradation     methyl orange     ZnO/TiO2 composites     high performance liquid chromatography    

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Preparation and characterization of ZnO/ZnS hybrid photocatalysts via microwave-hydrothermal method

ZHAO Jinglian, WANG Xinping, ZHAO Liang

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 4,   Pages 415-420 doi: 10.1007/s11783-008-0056-2

Abstract: The photocatalytic performance of ZnO/ZnS hybrid nanocomposite was largely higher than that of the mereZnO or ZnS nanoparticles, but the complicated procedure and misdistribution of final products limitedis becoming a crucial step for the large-scale application of ZnO/ZnS hybrid photocatalytic techniquePreparation and characterization of nanosized ZnO/ZnS hybrid photocatalysts were studied in this paper) ZnS and hexagonal ZnO nanocrystallines with a narrow particle size distribution.

Keywords： large-scale     hexagonal     misdistribution     characterization     nanocomposite    

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Response of bioaerosol cells to photocatalytic inactivation with ZnO and TiO impregnated onto Perlite

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 3, doi: 10.1007/s11783-020-1335-9

Abstract:

•ZnO/Perlite inactivated 72% of bioaerosols in continuous gas phase.

Keywords： Immobilized catalysts     Continuous flow     Photocatalysis     Bioaerosols     Cytotoxicity     Inactivation mechanism    

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Preparation and photocatalytic kinetics of nano-ZnO powders by precipitation stripping process

ZHANG Dongxiang, XUE Min, XU Hang, XU Wenguo, TARASOV V

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 3,   Pages 319-324 doi: 10.1007/s11705-008-0051-y

Abstract: Ultra-fine zinc oxalate powders were prepared through a precipitation stripping method with bis(2-ethylhexyl) phosphate (HDEHP) diluted by tetrachloride carbon as the extractant, and oxalic acid ethanol aqueous solution as the re-extractant and precipitator. Zinc oxide powders were obtained by decomposing zinc oxalate powders at 450°C. The prepared zinc oxide powders were characterized by transmission electron microscope (TEM), Scanning electron microscope (SEM), Thermogravimetric analysis (TG), X-ray diffraction (XRD) and Fourier transmission infrared (FT-IR) spectrum. The photocatalytic performance of methylene blue by zinc oxide was studied based on the Langmuir model and Photo-Layer model. The results show that some zinc oxide powders were micro-multipore materials with hexagonal crystal. The particle size was around 32 nm. The photocatalytic process was the control step in the chemical reaction. The photo catalytic process followed pseudo-first order kinetics and •OH concentration inside the photo-layer in different reaction condition were calculated according to the Photo-Layer model.

Keywords： 2-ethylhexyl     micro-multipore     Photo-Layer     hexagonal     methylene    

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ZnO nanorefrigerant in R152a refrigeration system for energy conservation and green environment

D. SENDIL KUMAR,R. ELANSEZHIAN

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 1,   Pages 75-80 doi: 10.1007/s11465-014-0285-y

Abstract:

In this paper the reliability and performance of a vapour compression refrigeration system with ZnOZnO nanoparticles with refrigerant mixture were used in HFC R152a refrigeration system.The concentration of nano ZnO ranges in the order of 0.1% v, 0.3% v and 0.5%v with particle size of 50The results indicated that ZnO nanorefrigerant works normally and safely in the system.The ZnO nanoparticle concentration is an important factor considered for heat transfer enhancement in

Keywords： ZnO nanorefrigerant     reduced GWP     COP     pressure ratio green energy    

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Functional flax fiber with UV-induced switchable wettability for multipurpose oil-water separation

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1588-6

Abstract:

● A PAA-ZnO-HDTMS flax fiber with UV-induced switchable wettability

Keywords： Flax fiber     Switchable wettability     ZnO-HDTMS coating     Oil-water separation    

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Effective and selective separation of perrhenate from acidic wastewater by super-stable, superhydrophobic, and recyclable biosorbent

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1456-9

Abstract:

• A ZnO-biochar hybrid composite was prepared by solvothermal-pyrolysis

Keywords： Selectivity     Adsorption     Re(VII)     ZnO     Biochar    

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Application and mechanism of polysaccharide extracted from Enteromorpha to remove nano-ZnO and humic

Jianzhang Sun, Baoyu Gao, Yuanxia Luo, Moxi Xue, Xing Xu, Qinyan Yue, Yan Wang

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 3, doi: 10.1007/s11783-018-1029-8

Abstract: Enteromorpha polysaccharide (Ep) extracted from alga a novel green coagulant aid for nanoparticles (NPs) and heavy metal ions removal and the structure of EP was intensively studied in this study. The integration of Ep with polyaluminum chloride (PAC-Ep) coagulants exhibited higher coagulation performance than that of the polyaluminum chloride (PAC) because of the negatively charged NPs suspension and humic aid (HA) solution. Significant high removal efficiencies of dissolved organic matter (94.1%), turbidity (99.3%) and Zn ions (69.3%) were achieved by the PAC-Ep coagulants. The dual-coagulation properties of PAC-Ep for different pollutants was based on multiple mechanisms, including (i) Al charge neutralization; (ii) hydroxy aluminum hydroxyl bridging formed polynuclearhydroxy complexes bridge and sweep colloidal particles; (iii) adsorption and bridging of Ep chain for the NPs and heavy metal ions. Results indicated that the destabilization of colloid was induced by the coexisting HA and higher removal was achieved as ions adsorption was enhance in the presence of HA complexation. On the basis of that, the extraction of polysaccharide is a promising candidate for its high coagulation performance in water treatment.

Keywords： Algal Extraction     Enteromorpha polysaccharide     1H-13C nuclear magnetic resonance (NMR)     Fourier transform infrared (FTIR)     X-ray photoelectron spectroscopy (XPS)     Coagulation mechanism.    

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MOF-5@Ni derived ZnO@Ni3ZnC0.7/PMS System for Organic Matter Removal: A Thorough Understanding of the Article

Youwen Shuai, Xue Huang, Benyin Zhang, Lu Xiang, Hao Xu, Qian Ye, Jinfeng Lu, Jing Zhang

Engineering 2023, Volume 24, Issue 5,   Pages 254-264 doi: 10.1016/j.eng.2021.08.029

Abstract:

Highlights•[email protected]3ZnC0.7 was successfully synthesized as an effective adsorbent and oxidation catalyst.•Surface hydroxyl groups are the key active sites of both adsorption and degradation.•The degradation process regenerates the adsorption capacity of the catalyst.•Non-radical pathway is the main pathway of degradation in ZN-CS/PMS system.•The magnetic composite can be easily separated and the reusability was verified excellent.The heterogeneous catalytic activation of peroxymonosulfate for wastewater treatment is attracting increased research interest. Therefore, it is essential to find a sustainable, economical, and effective activated material for wastewater treatment. In this study, metal–organic frameworks (MOF)-5 was used as the precursor, and a stable and recyclable material [email protected]3ZnC0.7 that exhibited good adsorption and catalytic properties, was obtained by the addition of nickel and subsequent calcination. To investigate and optimize the practical application conditions, the elimination of rhodamine B (RhB) in water was selected as the model process. This study demonstrated that the degradation of organic matter in the system involved a coupling of the adsorption and degradation processes. Based on this, the mechanism of the entire process was proposed. The results of scanning electron microscopy, infrared spectrum analysis, and theoretical analysis confirmed that the van der Waals forces, electrostatic attraction, and hydrogen bonding influenced the adsorption process. Electron paramagnetic resonance analysis, masking experiments, and electrochemical tests conducted during the oxidative degradation process confirmed that the degradation mechanism of RhB included both radical and non-free radical pathways, and that the surface hydroxyl group was the key active site. The degradation of the adsorbed substrates enabled the regeneration of the active sites. The material regenerated using a simple method exhibited good efficiency for the removal of organic compounds in four-cycle tests. Moreover, this material can effectively remove a variety of organic pollutants, and can be easily recovered owing to its magnetic properties. The results demonstrated that the use of heterogeneous catalytic materials with good adsorption capacity could be an economical and beneficial strategy.

Keywords： MOF-based catalyst     Peroxymonosulfate     Adsorption     Free radical     Non-radical oxidation    

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Title Author Date Type Operation

Preparation of Cu/ZnO/Al

Hui FAN, Huayan ZHENG, Zhong LI

Journal Article

Photocatalytic activity of ZnO films with micro-grid structure

Chunzhi LI , Wenwen WANG , Junying ZHANG , Hailing ZHU , Weiwei ZHANG , Tianmin WANG ,

Journal Article

A simple and cheap method for preparation of coupled ZrO2/ZnO with high photocatalytic activities

WANG Zheng, ZHANG Bingru, LI Fengting

Journal Article

Cystine-assisted accumulation of gold nanoparticles on ZnO to construct a sensitive surface-enhanced

Journal Article

Reconstruction of Cu–ZnO catalyst by organic acid and deactivation mechanism in liquid-phase hydrogenation

Journal Article

Reactive adsorption desulfurization over a Ni/ZnO adsorbent prepared by homogeneous precipitation

Aihua KONG, Yanyu WEI, Yonghong LI

Journal Article

Photocatalytic degradation of methyl orange using ZnO/TiO composites

Ming GE , Changsheng GUO , Xingwang ZHU , Lili MA , Wei HU , Yuqiu WANG , Zhenan HAN ,

Journal Article

Preparation and characterization of ZnO/ZnS hybrid photocatalysts via microwave-hydrothermal method

ZHAO Jinglian, WANG Xinping, ZHAO Liang

Journal Article

Response of bioaerosol cells to photocatalytic inactivation with ZnO and TiO impregnated onto Perlite

Journal Article

Preparation and photocatalytic kinetics of nano-ZnO powders by precipitation stripping process

ZHANG Dongxiang, XUE Min, XU Hang, XU Wenguo, TARASOV V

Journal Article

ZnO nanorefrigerant in R152a refrigeration system for energy conservation and green environment

D. SENDIL KUMAR,R. ELANSEZHIAN

Journal Article

Functional flax fiber with UV-induced switchable wettability for multipurpose oil-water separation

Journal Article

Effective and selective separation of perrhenate from acidic wastewater by super-stable, superhydrophobic, and recyclable biosorbent

Journal Article

Application and mechanism of polysaccharide extracted from Enteromorpha to remove nano-ZnO and humic

Jianzhang Sun, Baoyu Gao, Yuanxia Luo, Moxi Xue, Xing Xu, Qinyan Yue, Yan Wang

Journal Article

MOF-5@Ni derived ZnO@Ni3ZnC0.7/PMS System for Organic Matter Removal: A Thorough Understanding of the

Youwen Shuai, Xue Huang, Benyin Zhang, Lu Xiang, Hao Xu, Qian Ye, Jinfeng Lu, Jing Zhang

Journal Article