期刊：
Journal of Physical Chemistry C,2008年112(3):747-753 ISSN：1932-7447
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Zhang, Xi; Ai, Zhihui; Jia, Falong] Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol Minist Educ, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol Minist Educ, Wuhan 430079, Peoples R China.
摘要：
A general one-pot solvothermal process was explored to prepare BiOX (X = Cl, Br, I) powders by employing ethylene glycol as the solvent. The as-prepared BiOX powders were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, UV−vis diffuse reflectance spectroscopy, and nitrogen sorption. The resulting BiOX samples were phase-pure and of hierarchical microspheres consisting of nanoplates. The band gaps of the as-prepared powders were estimated to about 3.22, 2.64, and 1.77 eV for BiOCl, BiOBr, and BiOI, respectively. On the basis of characterization results, we proposed a possible process for the growth of hierarchical BiOX nanoplate microspheres. Moreover, we evaluated their photocatalytic activities on the degradation of methyl orange and compared them with TiO2 (Degussa, P25) under UV−vis light irradiation and C-doped TiO2 under visible light (λ > 420 nm) irradiation, respectively. It was found that all the BiOX samples were photocatalytically active and BiOI exhibited excellent activity under both UV−vis and visible light irradiation. The resulting hierarchical BiOX nanoplate microspheres are very promising photocatalysts for degrading organic pollutants and other applications.
作者机构：
[Zhang, Lizhi; Xiao, Lifen; Qiao, Hui] Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
通讯机构：
[Xiao, Lifen] C;Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
关键词：
mesoporous TiO2;phosphatization;anode;lithium ion batteries;INTERCALATION ELECTRODE MATERIAL;ANATASE-TYPE TIO2;ELECTROCHEMICAL PROPERTIES;NANOTUBES;INSERTION;NANOCOMPOSITE;TEMPERATURE;NANORODS
摘要：
We report phosphatization is a promising method to enhance the performance of mesoporous TiO2 anode for lithium ion batteries. The resulting phosphated mesoporous TiO2 possessed higher reversible capacity and better cycling stability than the pure mesoporous TiO2. When cycled at 30 mA/g between 3.0 and 1.0 V, the initial capacity of phosphate mesoporous TiO2 was 249 mA h/g, significantly higher than that of pure mesoporous TiO2 (204 mA h/g). After 40 cycles, the capacity retention ratio of phosphate mesoporous TiO2 reached 83.7%, while pure mesoporous TiO2 had merely a capacity retention ratio of 62.3%. We believe that this phosphatization process could be used to enhance the electrochemical performance of other metal oxides for lithium ion batteries. (C) 2008 Elsevier B.V. All rights reserved.
摘要：
A novel hybrid bifunctional sensing platform for simultaneous determination of NO and 02 has been developed, whereby hematite nanotubes are immobilized into the chitosan matrix onto a gold electrode (labeled as HeNTs-Chi/Au). The HeNTs distributed in porous-structured chitosan matrix not only offer abundant active sites for bifunctional sensing of NO and 02, but also facilitate oxidation of NO and reduction of 02 dramatically. Straight calibration curves are achieved in analyte concentration ranges of 5.0 x 10(-8) to 1.25 x 10(-6) mol L-1 for NO and 2.5 x 10(-7) to 6.0 x 10(-6) mol L-1 for O-2. Also, the detection limits are low of 8.0 x 10(-9) mol L-1 for NO and 5.0 x 10(-8) mol L-1 for O-2. Such an efficient bifunctional sensor for NO and O-2 offers great potential in quantitation of NO levels in biological and medical systems, since NO level is highly regulated by various reactive oxygen species. (C) 2008 Elsevier B.V. All rights reserved.
期刊：
Journal of Physical Chemistry C,2007年111(20):7430-7436 ISSN：1932-7447
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi] Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.;Huazhong Univ Sci & Technol, Natl Coal Combust Lab, Wuhan 430074, Peoples R China.;Xianning Coll, Dept Biol & Chem, Xianning 437100, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
摘要：
In this study, we developed an efficient and reusable sono-Fenton system with Fe@Fe2O3 core−shell nanowires as the iron reagent. Similar to our previous sono-Fenton system working at pH = 2, this system could also much more effectively degrade rhodamine B than those with Fe2+, Fe2+/Fe2O3, or commercial zerovalent iron particles as the iron reagents at neutral pH. The nature of the Fe@Fe2O3 nanowire Fenton iron reagent was examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). It was found that this novel Fenton iron reagent could be recycled in this sono-Fenton system working at neutral pH. More importantly, the efficiency of this neutral-pH sono-Fenton system with adding 0.001 mol L-1 of Fe2+ even reached 92% for degrading RhB at neutral pH. This efficiency was close to that of our previous sono-Fenton system working at pH = 2. We proposed a possible mechanism for the sono-Fenton degradation of RhB over Fe@Fe2O3 core−shell nanowires at neutral pH, which involved an in situ recycling of iron species (Fe0 → Fen+ → Fe2O3). We believe that this economical and facile sono-Fenton system based on an Fe@Fe2O3 core−shell nanowire iron reagent may be applied to practical wastewater treatment.
期刊：
CHEMISTRY OF MATERIALS,2007年19(25):6065-6067 ISSN：0897-4756
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Zhang, LZ; Yu, Chuanfang; Jia, Falong; Ai, Zhihui] Cent China Normal Univ, Minist Educ, Coll Chem, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Minist Educ, Coll Chem, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
摘要：
A study was conducted, to demonstrate that a self-supported nanoporous gold film (NPGF) can be used for highly effective direct electro-oxidation of methanol in alkaline solution at room temperature. The self-supported NPGF electrode was fabricated through multicyclic electrochemical alloying, or dealloying of a polished gold electrode in an electrolyte composed of ZnCl 2 and benzyl alcohol (BA). It was found that the activity of NPGF was about 400 times more than that of the smooth gold electrode without decreasing after 100 cycles of activity test. Field-emission scanning electron microscopic (FESEM) images of the gold electrode after 30 cycles of alloying and dealloying in ZnCl2/BA electrolyte at 120°C revealed that the gold electrode surface had turned black. A well-defined three-dimensional nanoporous structure was also observed on the electrodes.
摘要：
For the first time nanoporous Zn and Ni particles were synthesized in dimethyl sulphoxide (DMSO) by a sonoelectrochemical method. The as-prepared samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen sorption. It was found that these nanopores were produced by the aggregation and/or melting of primary nanoparticles of about 4–5 nm in size under ultrasound irradiation after electrochemical reduction of metal ions. The utilization of nonaqueous solvent prevented the oxidation of these active metal nanoparticles, while the presence of poly-(vinylpyrrolidone) could inhibit the growth of the nanoparticles. This study provides a general method to continuously prepare nanoporous active metal particles from inorganic metal salts with high yields.
摘要：
A solution to nanocrystalline InNbO4 as a photocatalytically active ternary metal oxide semiconductor was presented, which involved the reaction of two chemically different precursors. The reaction temperature was kept at 200°C and the photocatalysis was characterized by high crystallininty and a high surface area of 54 m2g-1. The volume-weighted average crystallite size was calculated as 27.7 nm. Nitrogen sorption measurements were applied to determine the surface area of the InNbO4nanoparticles. A type IV adsorption-desorption isotherm was found, which points to the existence of an interparticle porous structure. The results prove that simple solution routes can go beyond the common metal oxides generally synthesized on the nanometer-scale, and that they can be extended to functional materials traditionally prepared by high temperature, solid-state processes.
关键词：
A1. Crystal morphology;A2. Growth from solutions;A2. Hydrothermal crystal growth;B1. Inorganic compounds;B2. Semiconducting lead compounds
摘要：
In this paper, lead iodide and lead oxide iodide crystalline films/crystals with various micro/nano-morphologies were synthesized by taking advantage of simple hydrothermal/solvothermal reactions between lead foil and element iodine under different conditions. The resulting products were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). It was found that the morphologies of the resulting thin films/crystals could be well controlled by the adjustment of several parameters including iodine concentration, reaction time, temperature and reaction solvents. Possible growth mechanisms of the lead iodide crystalline compounds were also discussed. The present research work may provide new insights into the morphology-controlled synthesis of metal iodide as well as other inorganic materials.
作者机构：
[Zhang, Lizhi; Jia, Falong; Xu, Hua; Ai, Zhihui] Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Peoples R China.
通讯机构：
[Jia, Falong] C;Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Peoples R China.
摘要：
In this communication, we demonstrated that the growth and assembly of TiO2 nanorods into hierarchical spheres could be realized on soft interface between water and chloroform in one pot. The synthesis was free of any surfactants or organometallic precursors or ligands. The resulting samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and high-resolution transmission electron microscopy. We evaluated photocatalytic activity of the hierarchical rutile TiO2 nanorods spheres on degradation of rhodamine B in aqueous solution under simulated solar light. It was found that the activity of the as-prepared TiO2 nanoarchitectures was about twice that of the famous commercial photocatalyst P25. Moreover, our method could be extended to prepare a series of inorganic hierarchical architectures formed through the assembly of nanorods, nanoplates, and nanoprisms on the interface of water/chloroform. This indicates that water and chloroform can provide a general soft interface platform for the growth and assembly of inorganic hierarchical nanoarchitectures.
