Liaoning Key Laboratory of Metallurgical Resource Recycling Science

Shenyang, China

Liaoning Key Laboratory of Metallurgical Resource Recycling Science

Shenyang, China

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Lei X.-F.,Northeastern University China | Xue X.-X.,Liaoning Key Laboratory of Metallurgical Resource Recycling Science | Yang H.,Liaoning Provincial Universities Key Laboratory of Boron Resource Ecological
Advanced Materials Research | Year: 2013

The paper investigates the feasibility to reduce Cr(VI) from the aqueous solution by sulfate-modified titanium-bearing blast furnace slag(STBBFS) prepared with the different preparation method. The different photocatalysts were examined by X-ray diffraction (XRD), UV-vis diffuse reflectance spectra and scanning electronic microscopy (SEM). The photocatalytic activities of the different catalysts were evaluated by the photocatalytic reduction of Cr(VI) under UV-vis light irradiation. For the photocatalytic reduction of Cr(VI), the photocatalytic activities of STBBFS catalysts were found to be strongly dependent of absorbance in UV-visible region, adsorption capacity and surface acidity, and STBBFS prepared by dry-process showed a higher photocatalytic activity compared to that prepared by hydro-chemistry method. © (2013) Trans Tech Publications, Switzerland.


Lei X.-F.,Northeastern University China | Chen C.,Northeastern University China | Li X.,Northeastern University China | Xue X.-X.,Liaoning Key Laboratory of Metallurgical Resource Recycling Science | Yang H.,Liaoning Provincial Universities Key Laboratory of Boron Resource Ecological
Applied Mechanics and Materials | Year: 2014

The paper preliminary studied the photocatalytic efficiency of the filter residue of the acidolysis of high titanium slag (RAHTS) with hydrochloric acid, and explored the photocatalytic efficiency on the acid methyl orange solution under the mercury lamp irradiation. With RAHTS performing as a raw material to react with hydrochloric acid, and then the substance content, nature and catalytic efficiency of the filter residues were examined by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and photocatalytic reaction apparatus. Through the experimental investigation, the photocatalytic degradation efficiency on the methyl orange of the filter residues increased with the acid-sludge ratio, reaction time, reaction temperature, and the concentration of hydrochloric acid. When the temperature was 100℃, the reaction time was 4 h, the concentration of the hydrochloric acid was 6 mol/L, the acid-sludge ratio was 1, the filter residues showed a best photocatalytic degradation efficiency. Under that experimental condition, the degradation rate was as high as 85.1%. © (2014) Trans Tech Publications, Switzerland.


Lei X.-F.,Northeastern University China | Chen C.,Northeastern University China | Li X.,Northeastern University China | Xue X.-X.,Liaoning Key Laboratory of Metallurgical Resource Recycling Science | Yang H.,Liaoning Provincial Universities Key Laboratory of Boron Resource Ecological
Applied Mechanics and Materials | Year: 2014

In this paper, steel slag as the main raw material, modified steel slag adsorbent was prepared using steel slag and the active carbon as the starting materials. The influences of doping substance, the particle size, calcining temperature and doping ratio on the decoloration rate of methyl orange wastewater were investigated. The results showed that the decoloration rate of methyl orange can reach 93.62% when the doping substance was the activated carbon, the particle size was 120 mesh, the calcining temperature was 700℃, the doping ratio was 1:1. © (2014) Trans Tech Publications, Switzerland.


Liu F.,Northeastern University China | Liu F.,Liaoning Key Laboratory of Metallurgical Resource Recycling Science | Liu F.,Liaoning Prov Universities Key Laboratory Of Boron Rsrc Ecol Utilization Technology And Boron Materials | Wang Y.,Northeastern University China | And 6 more authors.
Progress in Organic Coatings | Year: 2015

A series of UV curable EA-Si hybrid coatings were prepared by a simple approach combining radical and cationic photopolymerization, with epoxy acrylate (EA) as monomer, γ-glycidoxypropyltrimethoxysilane (GPTMS) as inorganic precursor, benzophenone (BP) as free radical photo initiator and a diaryliodonium salt DPIHFP as cationic photo initiator. The chemical structures of EA-Si hybrid coatings were characterized by Fourier transform infrared (FTIR), Raman spectroscopy and X-ray diffraction (XRD). The thermal and optical properties of hybrid coatings were investigated by thermal gravimetric analysis (TGA) and UV-vis transmission spectroscopy, respectively. The results indicated that cross-linked network structure of SiOSi formed in the hybrid coatings, which led to the decrease in crystallinity and of EA-Si hybrid coating. The final conversion of CC bonds was also decreased because of the addition of GPTMS. The thermal stability of EA-Si hybrid coatings was enhanced in the second decomposition stage (300-400 &Deg;C) because of the existence of organic-inorganic cross-linked network structures. The transparency of coatings at around 346 nm tended to increase with increasing concentration of inorganic precursor GPTMS. © 2015 Elsevier B.V. All rights reserved.


Lei X.F.,Northeastern University China | Xue X.X.,Liaoning Key Laboratory of Metallurgical Resource Recycling Science | Yang H.,Liaoning Provincial Universities Key Laboratory of Boron Resource Ecological
Advanced Materials Research | Year: 2014

Iron titanate photocatalysts were synthesized by the high-energy ball milling method with titanium ore as the starting material. X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), thermal gravity and differential thermal analysis (TG-DTA), UV-visible diffuse reflectance absorption spectra (UV-Vis), photoluminescence emission spectra(PL) and photocatalytic degradation measurement were conducted to characterize the structure, surface status, UV-visible light response and performance of the obtained sample. After low temperature calcination (above 400 °C), the photocatalytic activity of iron titanate catalyst decreased gradually, which was mainly due to the decrease of surface hydroxyls and reactant adsorption capability. © (2014) Trans Tech Publications, Switzerland.


Lei X.F.,Northeastern University China | Lei X.F.,Liaoning Key Laboratory of Metallurgical Resource Recycling Science | Lei X.F.,Liaoning Prov Universities Key Laboratory Of Boron Rsrc Ecol | Xue X.X.,Northeastern University China | And 5 more authors.
Applied Surface Science | Year: 2014

Ag-doped TiO2 nanomaterials (Ag-TiO2) were prepared by a sol-gel method. The structures of Ag-TiO2 nanomaterials were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (DRS), X-ray photoluminescence (PL) spectroscopy, X-ray photoelectron spectroscopy (XPS), thermogravimetry and differential thermal analysis (TG-DTA), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscope (TEM), scanning electron microscopy (SEM) and nitrogen adsorption-desorption isotherms. The photocatalytic activities were checked through the photocatalytic reduction of Cr(VI) as a model compound under visible light irradiation. The results showed that the Ag doping and the calcination temperature played an important role on the microstructure and photocatalytic activity of the samples. Ag-doped TiO2 samples calcinated at 400°C exhibits higher photocatalytic activity than that of the other samples under visible light irradiation. © 2014 Elsevier B.V. All rights reserved.


Lei X.F.,Northeastern University China | Lei X.F.,Liaoning Key Laboratory of Metallurgical Resource Recycling Science | Lei X.F.,Liaoning Provincial Universities | Xue X.X.,Northeastern University China | And 10 more authors.
Applied Surface Science | Year: 2015

The (N, S and C) co-doped TiO2 samples (NSC-TiO2) were synthesized by the sol-gel method combining with the high energy ball milling method calcined at the different temperature (400-700 °C), employing butyl titanate as the titanium source and thiourea as the doping agent. The structures of NSC-TiO2 samples were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (DRS), X-ray photoluminescence (PL) spectroscopy, X-ray photoelectron spectroscopy (XPS), thermogravimetry and differential thermal analysis (TG-DTA), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscope (TEM), scanning electron microscopy (SEM) and nitrogen adsorption-desorption isotherms. The photocatalytic activities were checked through the photocatalytic reduction of Cr(VI) as a model compound under visible light irradiation. The results showed that the (N, S and C) co-doping and the calcination temperature played important role on the microstructure and photocatalytic activity of the samples. According to XPS spectra, sulfur was mainly attributed to the TiOS bond; nitrogen was ascribed to the TiON and TiN bonds; carbon was assigned to the TiOC bond in the NSC-TiO2 samples. (N, S and C) co-doped TiO2 samples calcinated at 500 °C exhibits higher photocatalytic activity than that of the other samples under visible light irradiation, which can be attributed to the synergic effect of its enhancing crystallization of anatase and (N, S and C) co-doping. © 2015 Elsevier B.V. All rights reserved.


Lei X.-F.,Northeastern University China | Xue X.-X.,Northeastern University China | Xue X.-X.,Liaoning Key Laboratory of Metallurgical Resource Recycling Science | Yang H.,Liaoning University of Technology
Gongneng Cailiao/Journal of Functional Materials | Year: 2013

Nitric acid-modified titanium ore (NATO) photocatalysts were prepared by the high energy ball milling method at different temperature. NATO photocatalysts were characterized by XRD, FT-IR, UV-Vis absorption spectra, TG-DTA and PL measurements. Its photocatalytic activity was checked through the photocatalytic oxidation of methyl orange as a model compound under vis light irradiation. The results showed that: mixed crystal structure was found in NATO photocatalysts; the photocatalytic activities of NATO calcined at 400°C showed a higher catalytic activity compared to other catalysts; the higher concentration of nitrate and the visible absorption capacity, and the suitable phase ratio led to the enhancement of the photocatalytic activities of NATO calcined at 400°C; the decoloration rate of methyl orange reached 100% after 1h.


Lei X.F.,Northeastern University China | Lei X.F.,Liaoning Key Laboratory of Metallurgical Resource Recycling Science | Lei X.F.,Liaoning Prov Universities Key Laboratory Of Boron Rsrc Ecol | Xue X.X.,Northeastern University China | And 11 more authors.
Journal of Alloys and Compounds | Year: 2015

The (C, N and S) co-doped TiO2 (TH-TiO2) samples were synthesized by a sol-gel method calcined at 500 °C, employing butyl titanate as the titanium source and thiourea as the dopant. The structures of TH-TiO2 samples were characterized by X-ray diffraction (XRD), Transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectra (DRS), photoluminescence (PL) spectroscopy, Thermo gravimetry and differential thermal analysis (TG-DTA), Scanning electron microscopy (SEM) and nitrogen adsorption-desorption isotherms. The photocatalytic activities were checked through the photocatalytic reduction of Cr(VI) as a model compound under visible light irradiation. The results showed that the thiourea content played an important role on the microstructure and photocatalytic activity of the samples. According to XPS results, (C, N and S) atoms were successfully co-doped into the nanostructures of TH-TiO2 samples. TH-TiO2 samples with thiourea: Ti molar ratio of 1.5 exhibits higher photocatalytic activity than that of the other samples under visible light irradiation, which can be attributed to the synergic effect of the pure anatase structure, the higher light absorption characteristics in visible regions, separation efficiency of electron-hole pairs, the specific surface area and the optimum (C, N and S) content. © 2015 Elsevier B.V. All rights reserved.


Yu H.-H.,Shenyang Ligong University | Yu H.-H.,Northeastern University China | Yu H.-H.,Liaoning Key Laboratory of Metallurgical Resource Recycling Science | Li X.,Shenyang Ligong University | And 2 more authors.
Gongneng Cailiao/Journal of Functional Materials | Year: 2013

Using the iron ore tailings as the silica source and n-hexadecyltrimethyl ammonium bromide (CTAB) as the template, mesoporous molecular sieves MCM-41 was successfully synthesized by hydrothermal synthesis. The sample was characterized by XRD, BET and HRTEM. The effects of adsorption conditions on the adsorption efficiency for Cr6+ by the MCM-41 absorbents were systemically studied. The adsorption isothern model and adsorption kinetics model were also explored. With these parameters increasing, such as the adsorbent time, adsorbent dose, and initial concentration, the efficiencies of Cr6+ were also increased. The adsorption kinetics of MCM-41 absorbents for the Cr6+ was corresponded to the modified pseudo-second-order equations, and the absorption isotherms was all satisfied to the Langmuir models.

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