Yuqing Zhang

Yuqing Zhang
Tianjin University | tju · School of Chemical Engineering and Technology

PhD

About

34
Publications
1,710
Reads
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748
Citations
Citations since 2016
0 Research Items
372 Citations
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060

Publications

Publications (34)
Article
In order to recycle TiO2 photocatalysts and prevent TiO2 from damaging polyvinylidene fluoride (PVDF) films, porous ZrxSi1−xO2 shell/void/TiO2 core particles (Zr-SVTs) were firstly synthesized by the synergistic effect between nonionic surfactant P123 ((EO)20(PO)70(EO)20) and oleic acid (CH3(CH2)7CH = CH(CH2)7COOH) and cohydrolysis between TEOS and...
Article
Radial-arrayed porous SiO2 shell/void/TiO2 core nanoparticles (NSTs particles) were successfully prepared by the synergetic effect of oleic acid (CH3(CH2)7CH = CH(CH2)7COOH, OA) and non-ionic surfactant P123 ((EO)20(PO)70(EO)20). SEM shows that NSTs particles are still relatively spherical shape. Nanovoid formed between the SiO2 shell and TiO2 core...
Article
PVDF membranes are broadly applied in many fields owing to their good physicochemical stability, resistance to oxidation and chlorine. However when treating with wastewater, PVDF membranes are easily contaminated by pollutant, degrading their properties due to the hydrophobicity and poor anti-compaction capabilities, which can result in the decline...
Article
Phosphorylated TiO2-SiO2 (PTS) particles with good hydrophilicity were first synthesized by the sol-gel method and then added into a polysulfone (PSF) membrane to prepare a PTS/PSF composite membrane through a phase inversion process. The hydrophilic properties of the PTS particles were explained by a model proposed by Tanabe. The properties of the...
Article
Recently, the strategy of doping inorganic particles into polymer membranes to modify them has been studied intensively. However, these inorganic particles have a disadvantage without being in good compatibility with the polymers. To enhance the compatibility between inorganic particles and polymers, phosphorylated silica nanotubes (PSNTs) with spe...
Article
To enhance the stability of potassium ferrate (VI) (K2FeO4) electrodes and their discharge capabilities in alkaline battery systems, yttria (Y2O3) doped zirconia (ZrO2) (denoted as Y2O3–ZrO2) coatings are utilized to protect the K2FeO4 electrode in alkaline electrolytes. The preparation conditions of Y2O3–ZrO2 coatings on K2FeO4 electrodes are inve...
Article
In the field of photocatalytic dyes purification, the immobilization of TiO2 photocatalysts in polymeric supporters with high photocatalytic activity and mass transfer is still an important challenge. In this paper, pre-synthesized TiO2 (core)/oleic acid (OA) (shell) particles, denoted as TiO2/OA, was doped to poly(vinylidene fluoride) (PVdF) suppo...
Article
When treated with sewage, polysulfone (PSF) membranes have a tendency to be contaminated due to their hydrophobicity, which limits large scale applications. To enhance the hydrophilic and anti-fouling property of PSF membrane, a novel organic–inorganic composite membrane was prepared by adding sulfated Y-doped nonstoichiometric zirconia (zirconia w...
Article
Nonstoichiometric silica with multi-active groups particles (NS-MAG particles) were firstly synthesized, and then added to the porous matrix of PSF to prepare a NS-MAG/PSF composite membrane through a phase inversion process. The optimum preparation conditions of NS-MAG particles were researched and determined. Then the permeation fluxes of NS-MAG/...
Article
To efficiently treat anionic polyacrylamide (APAM) with a linear structure in wastewater, an Al2O3 film on the surface of diatomite was prepared via the hydrolysis reaction of AlCl3. The Al2O3-coated diatomite was characterized by FT-IR, XRD, and SEM. The results show that the Al2O3 film can be coated on diatomite. The resulting Al2O3-coated diatom...
Article
Fuel ethanol is one of the most important alternative fuels used as a substitute for fossil fuel. Lignocellulose is the most abundant biomass resource for the production of fuel ethanol. However, the hydrolysis of lignocellulose requires high enzyme loading. In order to strengthen the process of enzyme hydrolysis of lignocellulose, surfactant-polye...
Article
Polysulfone (PSF) membranes are broadly applied in many fields owing to good physicochemical stability, resistance to oxidation and chlorine. But when treated with wastewater containing oil, PSF membranes are easily contaminated due to their hydrophilicity, causing declining flux and lifespan of the membranes thereby limiting their large scale appl...
Article
Polysulfone (PSF) membranes are broadly applied in many industrial fields owing to their good physicochemical stability, resistance to oxygen and chlorine. Nevertheless, they are easy contaminated by oil due to their hydrophobicity, which limits their application in larger scale. To further enhance the properties of PSF membrane, such as hydrophili...
Article
Polysulfone (PSF) membranes are broadly applied in many fields owing to good physicochemical stability, resistance to oxidation and chlorine. But when treated with wastewater containing oil, PSF membranes are easy to be contaminated for its hydrophobicity, which can result in the declining of flux and lifespan of the membrane and limit their applic...
Article
The separation behavior of molecularly imprinted membrane (MIM) for flavonoids was investigated. The molecularly imprinted materials were prepared using luteolin as the template molecule and aminopropyltriethoxysilane (APTES) as the functional monomer, followed by dispersing into polysulfone (PSF) to form the MIM. The flux and the separation proper...
Article
BACKGROUND: Lignocellulose is a large source of biomass. However, the conversion ratio of lignocellulose into fermentable sugars is quite low, and the saccharification process requires lots of enzyme. In order to improve biocatalysis efficiency of cellulase for lignocellulose, poly ethylene glycol (PEG4000) is added to the above process. The effect...
Article
To improve the stability of potassium ferrate(VI) (K2FeO4) cathode and its properties of charge transfer in alkaline battery system, K2FeO4 cathodes are coated by yttria (Y2O3) doped zirconia (ZrO2) composites, denoted as Y2O3–ZrO2 composite coatings. These composite coatings are derived from the conversion of yttrium nitrate (Y(NO3)3·6H2O) and Zir...
Article
Polysulfone (PSF) membranes are broadly applied in the field of the treatment for wastewater containing oil owing to their good physicochemical stability, resistance to oxidation and chlorine. But they are easy to be contaminated by oil for its hydrophobic property, which limits their application in large scale. To enhance the capability of PSF mem...
Article
To improve the tensile strength and ionic conductivity of composite polymer films for lithium-ion batteries, molecular sieves of MCM-41 modified with sulfated zirconia (SO42−/ZrO2, SZ), denoted as MCM-41/SZ, were doped into a poly(vinylidene fluoride) (PVdF) matrix to fabricate MCM-41/SZ composite polymer films, denoted as MCM-41/SZ films. Examinat...
Article
Using the sol-gel method a series of nonstoichiometric nanosilica doped with the rare earth element Ce (CexSi1–xO2–δ, x = 0.0–0.14) were prepared in order to modify the physicochemical properties of the nanosilica surface and to enhance the strength of the Ce-nanosilica/polysulfone composite membranes. The CexSi1–xO2–δ samples were characterized by...
Article
Polysulfone (PSF) is a kind of popular membrane material for treatment of wastewater containing oil, for it is easily fabricated into ultrafiltration membrane or composite membrane. When treated with wastewater, it has a tendency to be contaminated for its hydrophobicity. In order to enhance the hydrophilic and anti-fouling property of membrane, we...
Article
In order to enhance the thermostability and efficiency of cellulase in the extraction of diosgenin from Dioscorea zingiberensis C.H. Wright, we applied polyethylene glycol (PEG) (400, 1000, 2000, and 4000) to modify cellulase. The modified cellulase, α-amylase and β-glycosidase were used to hydrolyze the material. The results show that the thermost...
Article
A new accurate separate membrane (ASM) for highly specific binding and permeation of luteolin molecules from aqueous solutions has been developed by a molecular imprinting technique. Luteolin molecular imprinted materials were prepared with luteolin modified by acryloyl chloride as the template molecule, followed by dispersing into polysulfone (PSF...
Article
In order to enhance the anti-fouling ability and separation efficiency of polysulfone (PSF) membrane during separating of Chinese yam polysaccharides, a novel composite membrane was prepared through a sol-gel process after adding Ce-doped nonstoichiometric nano-silica with higher activity and hydrophilic property to the porous matrix of PSF. Ce-dop...
Article
To enhance the selectivity of separation membrane in complex system, a composite membrane with molecule recognizing property is prepared according to the molecular imprinted technology. Firstly, functional silica sol was prepared by taking the luteolin as the template molecule, the γ-aminopropyltriethoxysilane (γ-APTS) as the functional monomer and...
Article
Polysulfone (PSF) is a kind of membrane material with better performance and broadly applied in water purification, biochemistry separation, Chinese traditional herb drugs extraction and concentration, etc. But PSF membrane has a tendency to be contaminated for its hydrophobicity, which can result in declining of flux and life of the membrane. To e...
Article
The pretreatment and saccharification process of lignocellulose were subjected to ultrasonic waves to enhance the saccharification rate. The morphology, structure and crystal performance of the original and treated lignocellulose samples were characterized by SEM and FTIR. Moreover, the effect of different pretreatment methods on the structure of t...
Article
One kind of built-in silica adsorbent, which has high adsorption selectivity to rutin, was synthesized using molecular imprinting technology by the following steps: synthesis of precursor from the reaction between water soluble rutin (as template molecule) and the functional monomer chloropropyltriethoxysilane, co-hydrolysis of the precursor and te...
Article
Full-text available
In order to selectively separate genistein from its crude solution, a novel silica adsorbent was prepared using genistein as the template molecule, g-aminopropylthriethoxysilane as the functional monomer and tetraethyl orthosilicate as the cross-linker. It was analyzed by the BET, FTIR, TEM characteristics, the static adsorption experiment, and sel...
Article
Multi-enzymatic catalysis combined with acid hydrolysis is studied in order to enhance the efficiency of the enzymatic catalysis and reduce the mass transfer resistance from starch and cellulose in the extraction of diosgenin from Dioscorea zingiberensis C. H. Wright. The cellulase is modified by polyethylene to increase its optimal reaction temper...
Article
The aim of this study is to prepare flavone imprinted silica with good sphericity. Previous studies have demonstrated that imprinted silica can be synthesized using a simple sol-gel method and a grinding-sieving process. Despite the simplicity of the synthetic method, the appearance of the final product obtained is often very irregular and nonunifo...
Article
To enhance the efficiency of cellulose bio-degradation and reduce the mass transfer resistance from cellulose consequently increase the extraction rate of diosgenin, glucose was separated and β-glycosidase was added in to decompose cellobiose in the biocatalysis pretreatment. The effect of β-glycosidase on cellulose degradation was studied by group...
Article
Objective: To enhance the yield and product quality of diosgenin extract, the method of stepwise biocatalysis was used. Methods: The optimum conditions of slepwise biocatalysis were obtained through orthogonal tests. In qualitative and quantitative analysis of diosgenin extracted through stepwise biocatalysis, IR spectrum and HPLC chromatogram were...

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