Guangxi Han

Liaoning University, Shenyang, Liaoning, China

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Publications (19)29.95 Total impact

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    ABSTRACT: Ag/TiO(2) coated composite was prepared via sol-gel method in order to elucidate its application in magnetic field assisted photocatalytic degradation of dyes. Through the degradation of organic dyes, the key influences such as Ag amount, heat-treated temperature and time on the photocatalytic activity of Ag/TiO(2), as well as UV irradiation time, rotational speed, dye concentration and magnetic sheet number on the photocatalytic degradation were studied. Results showed that the Ag/TiO(2) with 25 wt% Ag content heat-treated at 550 °C for 60 min has the best photocatalytic activity. With the increase of UV light irradiation time, rotational speed and magnetic sheet number, the degradation rate is improved. Different dye degradation proved that the method could universally be used.
    Water Science & Technology 01/2013; 67(4):722-8. · 1.10 Impact Factor
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    ABSTRACT: In this progress report, seven kinds of novel carefully designed and fabricated up-conversion luminescence agents, Er3+:Y3Al5O12, Er3+:YbnY3−nAl5O12, Er3+:Y3BaAl5−aO12, Er3+:Y3GabAl5−bO12, Er3+:Y3Al5NxO12−x, Er3+:Y3Al5FyO12−y and Er3+:YbnY3−nBaGabAl5−a−bNxFyO12−x−y, are successfully synthesized using sol–gel methods. After that, their corresponding photocatalysts, Er3+:Y3Al5O12/TiO2, Er3+:YbnY3−nAl5O12/TiO2, Er3+:Y3BaAl5−aO12/TiO2, Er3+:Y3GabAl5−bO12/TiO2, Er3+:Y3Al5NxO12−x/TiO2, Er3+:Y3Al5FyO12−y/TiO2 and Er3+:YbnY3−nBaGabAl5−a−bNxFyO12−x−y/TiO2, are also prepared by sol–gel coating process. The obtained up-conversion luminescence agents and photocatalysts were characterized by using XRD, XPS, SEM, UV–vis and fluorescence spectrophotometer. Synchronously, several kinds of organic dyes are used to test their photocatalytic degradation using prepared photocatalysts. It indicates that the up-conversion luminescence ability of Er3+:Y3Al5O12 can be improved obviously through doping of some elements. And then, the photocatalytic activity of TiO2 is markedly enhanced by modified up-conversion luminescence agents which can transform much visible light into ultraviolet light.
    Journal of Luminescence 11/2012; 132(11):3010–3018. · 2.14 Impact Factor
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    ABSTRACT: In this paper, several Yb, N and F-doped up-conversion luminescence agents, Er3+:Y3Al5O12, Er3+:YbnY3−nAl5O12, Er3+:Y3Al5NxO12−x, Er3+:Y3Al5FyO12−y and Er3+:YbnY3−nAl5NxFyO12−x−y, were successfully synthesized by sol–gel method and then their corresponding photocatalysts, Er3+:Y3Al5O12/TiO2, Er3+:YbnY3−nAl5O12/TiO2, Er3+:Y3Al5NxO12−x/TiO2, Er3+:Y3Al5FyO12−y/TiO2 and Er3+:YbnY3−nAl5NxFyO12−x−y/TiO2, were prepared by sol–gel coated method. The samples were characterized by X-ray diffractometer (XRD) and scanning electron microscopy (SEM). UV–vis spectrometer and fluorescence spectrophotometer were used to examine the visible absorption and ultraviolet emission spectra of Yb, N and F-doped up-conversion luminescence agents. Then, the photocatalytic activities of prepared catalysts were reviewed through the degradation of Acid Red B dye in aqueous solution under solar light irradiation. The influences of critical conditions such as doping amount, photocatalyst dose and initial concentration of Acid Red B were studied. In order to check the extensive performance, different organic dyes were used to be degraded by using the same prepared catalysts. In conclusion, Er3+:Yb0.3Y2.7Al5N0.01F0.01O11.98/TiO2 displays highest photocatalytic activity.
    Journal of Molecular Catalysis A Chemical 11/2012; s 363–364:265–272. · 3.19 Impact Factor
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    ABSTRACT: ZnO/hydroxylapatite (ZnO/HA) composite with HA molar content of 6.0% was prepared by the method of precipitation and heat-treated at 500°C for 40min and was characterized by powder X-ray diffraction (XRD). The sonocatalytic activities of ZnO/HA composite was carried out through the damage of bovine serum albumin (BSA) in aqueous solution. Furthermore, the effects of several factors on the damage of BSA molecules were evaluated by means of UV-vis and fluorescence spectra. Experimental results indicated that the damage degree of BSA aggravated with the increase of ultrasonic irradiation time, irradiation power and ZnO/HA addition amount, but weakened with the increase of solution acidity and ionic strength. In addition, the damage site to BSA was also studied by synchronous fluorescence technology and the damage site was mainly at tryptophan (Trp) residue. This paper provides a valuable reference for driving sonocatalytic method to treat tumor in clinic application.
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 04/2012; 94:228-34. · 1.98 Impact Factor
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    ABSTRACT: BACKGROUND: In order to effectively degrade bovine serum albumin (BSA) under ultrasonic irradiation, biological mineral material (tooth powder) was adopted to mix with nano-sized TiO2 powder. A TiO2/tooth composite with high sonocatalytic activity and remarkable selectivity was prepared.RESULTS: TiO2/tooth composite with tooth content of 30% (w/w) heat-treated at 500 °C for 40 min was used as sonocatalyst and the catalytic degradation of BSA under ultrasonic irradiation was examined. Some influencing factors, such as ultrasonic irradiation time, TiO2/tooth catalyst amount, solution acidity and NaCl concentration, were studied by UV-vis and fluorescence spectroscopic analysis. Furthermore, the BSA attack site for the TiO2/tooth composite was identifies by synchronous fluorescence spectra.CONCLUSION: The results indicated that, under ultrasonic irradiation, the TiO2/tooth composite can promote the degradation of BSA more effectively than pure nano-sized TiO2 powder. The attack site is identified as tyrosine (Tyr) residue. These results are of great significance for the use of a sonocatalytic method to treat tumours in clinical applications. Copyright © 2011 Society of Chemical Industry
    Journal of Chemical Technology & Biotechnology 04/2012; 87(4). · 2.50 Impact Factor
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    ABSTRACT: In this paper, the toluidine blue (TB) with tricyclic quinone imide plane structure is used as sonosensitizer to study the interaction and sonodynamic damage to bovine serum albumin (BSA) by UV–vis and fluorescence spectroscopy. The results show that the TB can bind to BSA molecules, obviously, and the synergetic effects of TB and ultrasonic irradiation can efficiently damage the BSA molecules. Otherwise, some influencing factors such as ultrasonic irradiation time, TB concentration, pH value and ionic strength on the damage of BSA molecules were also considered by the numbers. Synchronous fluorescence spectroscopy indicates that the tyrosine (Tyr) residues of BSA molecules are damaged more seriously than the tryptophan (Trp) residues under ultrasonic irradiation.Research Highlights► TB is used as quencher to study interaction to BSA. ► TB is used as sonosensitizer to study the sonodynamic damage to BSA. ► Synchronous fluorescence spectroscopy is used to study TB binding site to BSA.
    Journal of Luminescence 01/2011; 131(2):231-237. · 2.14 Impact Factor
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    ABSTRACT: In this work, Er3+:YAlO3/Fe-doped TiO2–ZnO composite, a novel photocatalyst, was synthesized by ultrasonic dispersion and liquid boiling method and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Of which, as an upconversion luminescence agent, the Er3+:YAlO3 can transform the visible light in solar energy into ultraviolet light, satisfying the requirement of TiO2–ZnO composite for photocatalytic degradation. The photocatalytic activity of Er3+:YAlO3/Fe-doped TiO2–ZnO composite was evaluated through the degradation of Acid Red B dye under solar light irradiation. The effects of preparation conditions such as Er3+:YAlO3 content, heat-treated temperature and heat-treated time on the photocatalytic activity of Er3+:YAlO3/Fe-doped TiO2–ZnO composite were examined. In addition, the influences of solar light irradiation time, dye initial concentration and Er3+:YAlO3/Fe-doped TiO2–ZnO amount as well as organic dyes on the photocatalytic degradation were also investigated. The experimental results indicated that the Er3+:YAlO3/Fe-doped TiO2–ZnO composite can effectively utilize solar energy to degrade Acid Red B dye and its photocatalytic activity was much superior to that of Fe-doped TiO2–ZnO composite under the same condition.
    Desalination. 01/2011; 268(1):68-75.
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    ABSTRACT: In this work, the effective degradation of Acid Red B dyes in aqueous solution was realized in various ultrasound (US)/TiO2/oxidant (KIO4, KIO3 and K2S2O8) systems. In addition, the degradation efficiencies of Acid Red B in US/TiO2/oxidant systems for a variety of oxidants were compared. The results revealed the obvious synergistic effects of sonocatalytic technology (ultrasonic irradiation combined with TiO2) and oxidants (KIO4, KIO3, and K2S2O8). Simultaneously, the effects of some operational parameters such as oxidant kind, ultrasonic irradiation time, solution acidity, oxidant concentration, and system temperature on the sonocatalytic degradation of Acid Red B have also been examined in this article. Under the same conditions, the degradation efficiency of Acid Red B dye was found to retain the order of US/TiO2/KIO4 > US/TiO2/K2S2O8 > US/TiO2/KIO3 > US/TiO2 > US. Particularly, by using US/TiO2/KIO4 system this method can remarkably shorten the degradation reaction time and completely degraded the Acid Red B. The method of sonocatalytic degradation assisted with oxidants exhibits a widely applied foreground, therefore, should be a feasible choice for treating various organic wastewaters, especially, non- or low-transparent dye wastewaters. © 2010 American Institute of Chemical Engineers Environ Prog, 2010
    Environmental Progress & Sustainable Energy 11/2010; 29(4):443 - 449. · 0.87 Impact Factor
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    ABSTRACT: The CeO2/TiO2, SnO2/TiO2 and ZrO2/TiO2 composites were prepared by dispersing various nano-sized oxides (CeO2, SnO2, ZrO2 and TiO2) with ultrasound and mixing TiO2 with CeO2, SnO2 and ZrO2, respectively, in boiling water in a molar ratio of 4:1, followed by calcining temperature 500 °C for 60 min. Then a series of sonocatalytic degradation experiments were carried out under ultrasonic irradiation in the presence of CeO2/TiO2, SnO2/TiO2 and ZrO2/TiO2 composites and nano-sized TiO2 powder. Also, the influences of heat-treatment temperature and heat-treatment time on the sonocatalytic activities of CeO2/TiO2, SnO2/TiO2 and ZrO2/TiO2 composites, and of irradiation time and solution acidity on the sonocatalytic degradation of Acid Red B were investigated by UV–vis spectra. It was found that the sonocatalytic degradation of Acid Red B shows significant variation in rate and ratio that decreases in order: CeO2/TiO2 > SnO2/TiO2 > TiO2 > ZrO2/TiO2 > SnO2 > CeO2 > ZrO2, and the corresponding ratios of Acid Red B in aqueous solution are 91.32%, 67.41%, 65.26%, 41.67%, 28.34%, 26.75% and 23.33%, respectively. And that the degradation ratio is only 16.67% under onefold ultrasonic irradiation. Because of the good degradation efficiency, this method may be an advisable choice for the treatment of non- or low-transparent wastewaters in the future.
    Ultrasonics Sonochemistry 04/2010; 17(4):642–648. · 3.52 Impact Factor
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    ABSTRACT: A very simple and novel method is devised to study the mechanism of phase transfer catalysis (PTC) for a nucleophilic substitution reaction between potassium thiocyanate and p-nitrobenzyl bromide (p-NB); the mechanism of the nucleophilic substitution reaction is illustrated by characterizing the interfacial dilational viscoelastic properties of the crown ether catalysts and intermediates, which are closely related to the interfacial behavior of the species in the PTC reaction. The results obtained from this study can be used to infer the mechanism of the nucleophilic substitution reaction that uses 18-crown-6 (18C6) and dibenzo-18-crown-6 (DB18C6) as phase transfer catalysts. This mechanism begins with formation of the intermediates [K · Crown ether]+ and [K · Crown ether]+SCN− through mutual collisions between crown ethers and KSCN in the aqueous phase near the interface. Then the complex, [K · Crown ether]+Br−, was obtained due to the collision between [K · Crown ether]+SCN− and p-NB in the organic phase near the interface and simultaneously the products were obtained.
    Kinetics and Catalysis 01/2010; 51(1):69-74. · 0.54 Impact Factor
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    ABSTRACT: Here, a novel degradation method, air-bubble cavitation induced by air-bubble passing small glass balls, was provided to effectively degrade organic pollutants in wastewaters. In order to demonstrate its universality, the degradation of various dyes (Methyl Orange (MO), Rhodamine B (RM-B), Congo Red (CG-R), Azo Fuchsin (AF) and Acid Red B (AR-B)) was carried out. Meanwhile, the effect of operating parameters such as air-bubbling time, dye initial concentration, NaCl addition amount and glass-ball size on the degradation were investigated. The results showed that the degradation ratio of Methyl Orange in aqueous solution reached 37.82% when the experimental conditions of 10 mg/L initial concentration, 3.0–3.5 mm glass-ball size, 4.5 L/min gas flow rate and pH = 6.0 were adopted with 3.0 h air-bubbling at room temperature (25.0 ± 0.2 °C). Under the same condition, the degradation ratios attained to 60.37%, 64.52%, 71.75% and 75.64%, respectively, for Rhodamine B, Congo Red, Azo Fuchsin and Acid Red B. In addition, the process of air-bubble cavitation and possible degradation mechanism of organic pollutants were discussed primarily. All experiments indicate that this method is an effective, energy saving and simple reaction device for the treatment of organic wastewaters. Hence the degradation by means of air-bubble cavitation is expected to be feasible and promising as an advisable choice for the treatment of organic wastewaters in future.
    Chemical Engineering Journal. 01/2010; 164(1):23-28.
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    ABSTRACT: By research, it was found that the Amsacrine (AMSA) can interact with bovine serum albumin (BSA). In this work, the AMSA was adopted as a sonosensitizer and the Metronidazole (MET) was used as a sensitizer to further damage BSA molecules under ultrasonic irradiation. It could be concluded that the damage degree of BSA molecules in the presence of AMSA and MET was more serious than in the presence of pure AMSA. That is, MET could aggravate the damage to BSA molecules under ultrasonic irradiation combined with AMSA. Meanwhile, the damage degree of BSA molecules was also influenced by some factors, such as ultrasonic irradiation time, MET concentration and solution acidity. In addition, the damage site of BSA molecules was estimated by synchronous fluorescence spectra. It was found that the tyrosine (Tyr) and tryptophan (Typ) residues were damaged almost averagely. Perhaps, these research results are of great significance for driving sonodynamic method to treat tumor in clinic application.
    Journal of photochemistry and photobiology. B, Biology 11/2009; 98(1):61-8. · 3.11 Impact Factor
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    ABSTRACT: In this work, Er(3+):YAlO(3)/ZnO-TiO(2) and ZnO-TiO(2) composites were prepared by the ultrasonic dispersion and liquid boiling method. In succession, they were then characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Acid red B as a model dye compound was degraded under solar light irradiation to evaluate the photocatalytic activities of the Er(3+):YAlO(3)/ZnO-TiO(2) and ZnO-TiO(2) composites. We found that the photocatalytic activity of ZnO-TiO(2) composite can be enhanced by adding an appropriate amount of Er(3+):YAlO(3). We reviewed influencing factors, such as Er(3+):YAlO(3) content, heat-treated temperature and heat-treated time on the photocatalytic activity of the Er(3+):YAlO(3)/ZnO-TiO(2) composites. In addition, the effects of solar light irradiation time, dye initial concentration, Er(3+):YAlO(3)/ZnO-TiO(2) amount and solution acidity on the photocatalytic degradation of acid red B dye in aqueous solution were investigated in detail. Simultaneously, the degradation and comparison of other dyes such as methyl orange (MO), rhodamine B (RM-B), azo fuchsine (AF), congo red (CG-R) and methyl blue (MB) were also reviewed. In addition, we attempted to explore both the principle of possible excitation of Er(3+):YAlO(3)/ZnO-TiO(2) under solar light irradiation and the mechanism of photocatalytic degradation.
    Journal of Environmental Management 10/2009; 91(3):677-84. · 3.06 Impact Factor
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    ABSTRACT: In this work, an upconversion luminescence agent, crystallized Er(3 + ):YAlO(3), was synthesized and then coated by the nano-sized TiO(2) film through sol-gel technique. A novel TiO(2) photocatalyst, Er(3 + ):YAlO(3)/TiO(2), with high activity in visible light was subsequently prepared. The Er(3 + ):YAlO(3) and Er(3 + ):YAlO(3)/TiO(2) were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM). The photocatalytic activity of Er(3 + ):YAlO(3)/TiO(2) photocatalyst was tested by the degradation of acid red B in aqueous solution as the primary model compound under visible light irradiation. The experimental results proved that the prepared TiO(2)-coated crystallized Er(3 + ):YAlO(3) was able to decompose the acid red B efficiently, and it is promising to use the idea to develop new TiO(2) photocatalyst with high activity for photocatalytic degradation under visible light.
    Water Science & Technology 02/2009; 60(4):917-26. · 1.10 Impact Factor
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    ABSTRACT: A new Re-doped nano-TiO2 photocatalyst was synthesized by immersion method. The novel doped nano-TiO2 photocatalyst utilizing visible light was firstly prepared. The doped nano-TiO2 powder was charactered by XRD, FTIR, UV-Vis, and its photocatalytic activity was tested through the photocatalytic degradation of methamidophos as a model compound under ultraviolet irradiating and in sunlight, respectively. In order to compare the photocatalytic activities, the same experiment was carried out for undoped nano-TiO2. The degradation ratio of methamidophos in the presence of doped nano-TiO2 reached 64.40% under sunlight for 12 h, which was 2.64% in the presence of undoped nano-TiO2. The degradation ratio of methamidophos in the presence of doped nanoTiO2 reached 90.39% under UV irradiationat 2.5 h, which was 51.29% in the presence of undoped nano-TiO2. All the results show that the doped TiO2 is a promising photocatalyst using sunlight for treating the organophosphorous pesticide wastewater.
    Russian Journal of Inorganic Chemistry 01/2009; 54(8):1210-1216. · 0.42 Impact Factor
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    ABSTRACT: In the title compound, {[Mn(C(4)H(4)O(6))(H(2)O)]·H(2)O}(n), the Mn(2+) ion is connected to three different tartrate anions and a water mol-ecule, resulting in a distorted MnO(6) octa-hedral geometry. There are two tartrate half-anions in the asymmetric unit, both of which are completed by crystallographic twofold rotation symmetry. The tartrate dianions bridge the Mn(2+) ions to form a wave-like infinite layer. A series of O-H⋯O hydrogen bonds link the layers into a three-dimensional network.
    Acta Crystallographica Section E Structure Reports Online 02/2008; 64(Pt 2):m360. · 0.35 Impact Factor
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    ABSTRACT: In this work, the Er3+:YAlO3, as up-conversion luminescence agent, was deposited on the surface of TiO2–SnO2 composite and then a novel sonocatalyst, Er3+:YAlO3/TiO2–SnO2, was obtained. The Er3+:YAlO3/TiO2–SnO2 was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Its sonocatalytic activity was examined through the degradation of Acid Red B under ultrasonic irradiation. The degradation process of Acid Red B was monitored by UV–vis spectrophotometer and ion chromatography. Furthermore, the main influence factors on the sonocatalytic activity of Er3+:YAlO3/TiO2–SnO2 such as Ti/Sn molar ratio, heat-treated temperature and heat-treated time were studied. The results indicate that the Er3+:YAlO3/TiO2–SnO2 with 3:7 Ti/Sn molar ratio heat-treated at 550 °C for 60 min exhibit a best sonocatalytic activity during the degradation of Acid Red B. In addition, the results also show that Er3+:YAlO3/TiO2–SnO2 displays a good sonocatalytic activity for other organic dyes degradation.
    Journal of Molecular Catalysis A Chemical 366:282–287. · 3.19 Impact Factor
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    ABSTRACT: In this work, the Er3+:YAlO3, as upconversion luminescence agent, was prepared and coated by ZnO film through sol-gel technique and the Er3+:YAlO3/ZnO coating compound, a novel photocatalyst, with high activity under sun light irradiation was subsequently prepared. The Er3+:YAlO3 and Er3+:YAlO3/ZnO were characterized by XRD. The activity of Er3+:YAlO3/ZnO was tested by photocatalytic degradation of acid red B in aqueous solution. The experimental results proved that the Er3+:YAlO3/ZnO was able to decompose the acid red B efficiently, and it is promising to use the idea to develop new photocatalyst with high activity for degradation under sun light irradiation.
    Inorganic Materials 46(4):399-404. · 0.38 Impact Factor
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    ABSTRACT: The partial phase transformation of nanometer TiO2 powder from anatase to rutile was realized by heat-treatment, and then a novel photocatalyst which could utilize solarlight was obtained. The heat-treated nanometer TiO2 powders at different transition stage were characterized by XRD, TEM and UV-vis spectra. In addition, the photocatalytic activity of heat-treated nanometer TiO2 powder was tested out through the degradation of Rhodamine B dye in aqueous solution under solarlight irradiation. The results reveal that the nanometer anatase TiO2 powder heat-treated at 500°C for 80 min exhibites the highest photocatalytic activity. That is, Rhodamine B dye can effectively degraded under solarlight irradiation in the presence of heat-treated nanometer TiO2 powder.
    Inorganic Materials 46(9):965-970. · 0.38 Impact Factor