作者机构：
[Wang, Kewei; Zhang, Lizhi; Jia, Falong] Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Peoples R China.
通讯机构：
[Jia, Falong] C;Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Peoples R China.
关键词：
BiOI;Flexible solar cell;Nanocrystalline materials;Thin film
摘要：
BiOI nanoflake arrays were fabricated on the ITO/PET substrate by modified successive ionic layer adsorption and reaction (SILAR) method and served as p-type semiconductor materials for flexible solar cell. The morphologies of BiOI nanoflakes deposited on ITO/PET after different cycles of SILAR were analyzed and these nanoflakes were all in single crystalline structure. The growth process of BiOI nanoflake arrays was discussed and corresponding formation mechanism was proposed. The assembled dye-free BiOI/ITO/PET solar cell exhibited superior photovoltaic performance than that on FTO/glass substrate. In addition, the adhesion of BiOI to ITO/PET substrate was superior and the photocurrent of flexible solar cell was stable after bending test.
作者机构：
[Wang, Fangfang; Jia, Falong] Cent China Normal Univ, Coll Chem, Wuhan 430079, Peoples R China.;[Zheng, Zhi] Xuchang Univ, Inst Surface Micro & Nano Mat, Xuchang 461000, Peoples R China.
通讯机构：
[Jia, Falong] C;Cent China Normal Univ, Coll Chem, Wuhan 430079, Peoples R China.
关键词：
Nanocomposites;Photoelectrochemical water splitting;Thin films;TiO 2
摘要：
We demonstrate that appropriate Pt loading could significantly enhance the ability of TiO2 nanorods array thin film (TNTF) electrode to photoelectrochemically split water under solar light. The TiO2 nanorods array thin film was directly grown on fluorine-doped tin oxide glass through hydrothermal reaction. And platinum (Pt) nanoparticles were deposited uniformly on the surface of TiO2 nanorods by a convenient sputtering method. The Pt-loaded TNTF sample was highly stable during the photoelectrochemical water splitting process. Its activity did not decrease after 50 continuous potential scans. This study reveals that the Pt loaded TiO2 nanorods array thin film electrode is promising for the photoelectrochemical water splitting to generate hydrogen.
摘要：
Uniform tellurium nanorod arrays (TNA) have been successfully deposited directly on Pt/FTO (F-doped SnO(2))/glass substrate through a facile surfactant-assisted approach, which involved chemical reduction of TeO(3)(2-) ions by hydrazine hydrate. The whole synthesis process is highly repeatable and performed simply by immersing the Pt/FTO/glass in the solution for a certain time. During the growth of TNA, Pt catalyzed the reduction of TeO(3)(2-) ions by hydrazine hydrate and Te nanoparticles were deposited firmly on the substrate at first. Then, under the regulation of the surfactant (cetyltrimethylammonium bromide, CTAB), the deposited Te grew into nanorod arrays and adhered firmly to the substrate. Similar Te nanorod arrays could also grow on a Pd substrate which has the same catalytic performance as that of Pt. The as-synthesized TNA could be used as a good template to synthesize platinum-and gold-coated nanorods through convenient galvanic replacement. As a demonstration of potential application, the gold/tellurium nanorods showed uniform surface-enhanced Raman scattering (SERS) using rhodamine 6G (Rh6G) as the analyte. This approach provides a simple route for the growth of standing Te nanorods on a substrate, which may be used for the synthesis of other standing one-dimensional materials through a similar mechanism.
摘要：
Platinum nanostructured networks (PNNs) can be synthesized through the chemical reduction of H2PtCl6 by benzyl alcohol under microwave irradiation without the introduction of any surfactants, templates, or seeds. The synthesis route utilizes benzyl alcohol as both the reductant and the structure-directing agent, and thus, the process is particularly simple and highly repeatable. The formation of the PNN structure was ascribed to the collision-induced fusion of Pt nanocrystals owing to the cooperative functions of microwave irradiation and benzyl alcohol. Compared with a commercial Pt/C catalyst, the as-prepared PNNs possessed superior electrochemical activity and stability on the oxidation of methanol because of the unique 3D nanostructured networks and abundant defects formed during the assembly process. This study may provide a facile microwave-induced approach for the synthesis of other 3D nanostructured noble metals or their alloys.
作者机构：
[Jia, Falong] Cent China Normal Univ, Coll Chem, Wuhan 430079, Peoples R China.;[Du, Ruxu; Wong, Ka-wai] Chinese Univ Hong Kong, Inst Precis Engn, Shatin, Hong Kong, Peoples R China.;[Wong, Ka-wai] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China.
通讯机构：
[Wong, Ka-wai] C;Chinese Univ Hong Kong, Inst Precis Engn, Shatin, Hong Kong, Peoples R China.
期刊：
Journal of Physical Chemistry C,2009年113(17):7200-7206 ISSN：1932-7447
通讯作者：
Jia, Falong
作者机构：
[Zhang, Lizhi; Jia, Falong] Cent China Normal Univ, Coll Chem, Wuhan 430079, Peoples R China.;[Wong, Ka-wai] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China.
通讯机构：
[Jia, Falong] C;Cent China Normal Univ, Coll Chem, Wuhan 430079, Peoples R China.
摘要：
Uniform nanostructured palladium (Pd) has been successfully electrodeposited directly on gold substrate through a facile template-free approach, which involved a cyclic electrochemical deposition/dissolution of Pd. Under the regulation of potential scan and surfactant, standing Pd nanoplates and nanotrees were prepared. Improved and superior electrocatalytic activities toward the oxidation of ethanol were observed from these electrodes coated with nanostructured Pd. Furthermore, the uniform Pd nanostructures can be conveniently deposited onto a flexible substrate with a gold precoating, thus allowing fabrication of miniaturized flexible devices. This approach provides a simple route for the synthesis of highly catalytic Pd nanostructures with an excellent electrical contact to a substrate, which is important for the overall device performance. The critical effects exerted by the electrochemical conditions and surfactant will also be discussed.
摘要：
This paper describes the fabrication and electrochemical behavior of hierarchical nanoporous gold film (HNPGF) electrode by multi-cyclic electrochemical co-alloying/dealloying of two sacrifice metals (Zn and Sn) with gold. Different from the nanoporous gold film (NPGF) formed in the electrolyte of ZnCl2 in benzyl alcohol, the HNPGF obtained possessed special hierarchical porous structure and extra high roughness factor of 1250. This study reveals that hierarchical porous gold film electrodes are promising for catalysis.
期刊：
Journal of Physical Chemistry C,2009年113(50):21034-21041 ISSN：1932-7447
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Li, Pengna; Lia, Falong; Xiao, Haiyan] Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Peoples R China.
摘要：
In this paper, we report on the synthesis of nanostructured rare earth oxides (Sm2O3, Gd2O3, Dy2O3) via a facile benzyl alcohol based nonaqueous sol−gel process followed by calcination at moderate temperature. During the synthesis, rare earth acetylacetonates were used as the precursors. The resulting samples were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, and photoluminescent spectroscopy. The final nanostructured RE2O3 products were observed to possess two typical shapes: stacks of ultrathin nanodisks for Sm2O3 and hierarchical nanosheet microspheres for Gd2O3 and Dy2O3, respectively. This method could be extended to prepare high-quality luminescent Gd2O3:Eu3+ flowerlike superstructures with a strong red emission corresponding to 5D0 → 7F2 transition (612 nm) of Eu3+ under ultraviolet excitation (260 nm). The possible formation mechanisms of the ultrathin nanodisk stacks and hierarchical nanosheet microspheres are proposed on the basis of the characterization results. This study provides an alternative nonaqueous approach for the synthesis of nanostructured rare earth oxides.
作者机构：
[Du, R. X.; Wong, K. W.; Jia, F. L.] Chinese Univ Hong Kong, Inst Precis Engn, Shatin, Hong Kong, Peoples R China.;[Gong, J. M.; Jia, F. L.] Cent China Normal Univ, Coll Chem, Wuhan 430079, Peoples R China.;[Wong, K. W.] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China.
通讯机构：
[Wong, K. W.] C;Chinese Univ Hong Kong, Inst Precis Engn, Shatin, Hong Kong, Peoples R China.
作者机构：
[Zhang, Lizhi; Shang, Xiaoying; Yang, Yan; Jia, Falong] Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Peoples R China.
关键词：
Magnetic materials;metal;Nanospheres;Nanowires;Nickel;Sol–gels
摘要：
A surfactant-free non-aqueous approach for the preparation of high-purity Ni nanomaterials with nickel acetylacetonate (Ni(acac)2) as the precursor and benzyl alcohol as the solvent was investigated. The reaction solution was prepared by dissolving Ni(acac)2 in benzyl alcohol at 60°C. flask. The flask was then placed in a static constant magnetic field with two permanent rare-earth NdFeB magnets arranged face to face around the flask and heated to 200°C in an oil bath. The rotating magnetic field was realized by the circumrotation of the two magnets at a speed of 300 rpm with a constant magnetic field. After reaction for 1 h, the resulting black Ni powder was separated from the solution by centrifugation, and washed four times with ethanol under ultrasonication. It has been found that an external magnetic field can significantly influence the morphology and structure of products formed in the benzyl alcohol systems.
摘要：
We report a one-pot method to synthesize CoO/C hybrid microspheres via a solvothermal approach. The resulting samples were characterized by thermogravimetric analysis, X-ray diffraction, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy and charge–discharge test. X-ray diffraction analysis revealed that the as-prepared samples possessed poor crystalline characteristics and were transformed into crystalline materials after thermal treatment. Field-emission scanning electron microscope images showed that the surfaces of these as-prepared spheres were relatively smooth and of about 2.2 μm in diameter. The diameters of the spheres kept unchanged after being annealed at 800 °C in a high purity nitrogen atmosphere under ambient pressure. The preliminary electrochemical test found that the annealed CoO/C hybrid microspheres exhibited an ultrahigh initial discharge capacity of 1481.4 mAh g−1 in the potential range of 3.0–0.01 V. This value was much higher than that of CoO nanoparticles. Although the capacity of the second discharge cycle decayed to 506.2 mAh g−1, the annealed CoO/C hybrid microspheres anode exhibited very stable reversible capacity at about 345 mAh g−1 only after 10 cycles. This rapid stabilization ability was attributed to the matrix effect of carbon, which may effectively prevent the aggregation of small particles during charging–discharging process.
