Zn（O,S）（zinc oxysulfide） is an important chalcogenide material recently reported to be potentially applied as electrode buffers in thin film solar cells. Both vacuum and solution approaches have enabled the fabric...Zn（O,S）（zinc oxysulfide） is an important chalcogenide material recently reported to be potentially applied as electrode buffers in thin film solar cells. Both vacuum and solution approaches have enabled the fabrication of Zn（O,S） films. However they either require extreme conditions and high energy consumption for synthesis, or suffer from lack of controllability mainly due to the thermodynamic and kinetic distinction between Zn O and Zn S during film growth. Here we demonstrated an effective electrodeposition route to obtain high-quality Zn（O,S） thin films in a controllable manner. Importantly, tartaric acid was employed as a secondary complexing agent in the electrolyte to improve the film morphology, as well as to adjust other key properties such as composition and absorption. To elucidate the vital role that tartaric acid played, thermodynamic and kinetic processes of electrodeposition was investigated and discussed in detail. The accumulative contribution has shed light on further exploit of Zn（O,S） with tunable properties and optimization of the corresponding electrodeposition process, for the application in thin film solar cells.展开更多
Uniform and well-dispersed Zn S nanospheres have been successfully synthesized via a facile chemical route. The crystal structure, morphology, surface area and photocatalytic properties of the sample were characterize...Uniform and well-dispersed Zn S nanospheres have been successfully synthesized via a facile chemical route. The crystal structure, morphology, surface area and photocatalytic properties of the sample were characterized by powder X-ray diffraction（XRD）, scanning electron microscopy（SEM）, Brunauer-Emmett-Teller（BET） and ultraviolet-visible（UV-vis） spectrum. The results of characterizations indicate that the products are identified as mesoporous zinc-blende ZnS nanospheres with an average diameter of 200 nm, which are comprised of nanoparticles with the crystallite size of about 3.2 nm calculated by XRD. Very importantly, photocatalytic degradation of methylene blue（MB） shows that the as-prepared Zn S nanospheres exhibit excellent photocatalytic activity with nearly 100% of MB decomposed after UV-light irradiation for 25 min. The excellent photocatalytic activity of ZnS nanospheres can be ascribed to the large specific surface area and hierarchical mesoporous structure.展开更多
The assembly of metal ions Zn2＋, Co2＋ and H2E2Ge2O3 ligand under mild hydro- thermal conditions leads to a mixed 3D transition zinc-cobalt-organogermanate framework, Zn0.88Co0.12（E2Ge2O3） （1, E = -CH2CH2COO-）. T...The assembly of metal ions Zn2＋, Co2＋ and H2E2Ge2O3 ligand under mild hydro- thermal conditions leads to a mixed 3D transition zinc-cobalt-organogermanate framework, Zn0.88Co0.12（E2Ge2O3） （1, E = -CH2CH2COO-）. The structure was determined by single-crystal X-ray diffraction and further characterized by IR spectroscopy, elemental analysis, energy- dispersive X-ray analysis, inductively coupled plasma, powder X-ray diffraction, thermogra- vimetric analysis and fluorescence spectroscopy. Compound 1 crystallizes in the chiral space group P212121, with a = 4.9096（5）, b = 8.9031（11）, c = 24.046（3） A, V = 1051.0（2） A3, C6H8Ge2O7Zn0.88Co0.12, Mr = 401.88, Z = 4, Dc = 2.540 g.cm-1,μ = 7.875 mm-1, F（000） = 775, GOF= 1.016, the final R = 0.0324 and wR = 0.0642. The structure ofl is built up by Ge-O sheets with Ge6 rings and Zn/Co-carboxyl layers. It should be mentioned that although the whole E2Ge2O32- ligand exhibits only one kind of coordination mode, it plays two roles in forming the structure： SBU and linker. In this situation, the E group of H2E2Ge2O3 ligand becomes a determining factor for structural dimensionality. In addition, it displays blue-violet emission light and shows high thermostability.展开更多
基金funding support from the National Natural Science Foundation of China(21371016)funding support from Young Talent Thousand Program
文摘Zn（O,S）（zinc oxysulfide） is an important chalcogenide material recently reported to be potentially applied as electrode buffers in thin film solar cells. Both vacuum and solution approaches have enabled the fabrication of Zn（O,S） films. However they either require extreme conditions and high energy consumption for synthesis, or suffer from lack of controllability mainly due to the thermodynamic and kinetic distinction between Zn O and Zn S during film growth. Here we demonstrated an effective electrodeposition route to obtain high-quality Zn（O,S） thin films in a controllable manner. Importantly, tartaric acid was employed as a secondary complexing agent in the electrolyte to improve the film morphology, as well as to adjust other key properties such as composition and absorption. To elucidate the vital role that tartaric acid played, thermodynamic and kinetic processes of electrodeposition was investigated and discussed in detail. The accumulative contribution has shed light on further exploit of Zn（O,S） with tunable properties and optimization of the corresponding electrodeposition process, for the application in thin film solar cells.
基金supported by the National Natural Science Foundation of China(21663021)the Natural Science Key Project of Jiangxi Province(2017ACB20040)the Natural Science Foundation of Jiangxi Province(20161BAB213058)
文摘Uniform and well-dispersed Zn S nanospheres have been successfully synthesized via a facile chemical route. The crystal structure, morphology, surface area and photocatalytic properties of the sample were characterized by powder X-ray diffraction（XRD）, scanning electron microscopy（SEM）, Brunauer-Emmett-Teller（BET） and ultraviolet-visible（UV-vis） spectrum. The results of characterizations indicate that the products are identified as mesoporous zinc-blende ZnS nanospheres with an average diameter of 200 nm, which are comprised of nanoparticles with the crystallite size of about 3.2 nm calculated by XRD. Very importantly, photocatalytic degradation of methylene blue（MB） shows that the as-prepared Zn S nanospheres exhibit excellent photocatalytic activity with nearly 100% of MB decomposed after UV-light irradiation for 25 min. The excellent photocatalytic activity of ZnS nanospheres can be ascribed to the large specific surface area and hierarchical mesoporous structure.
基金supported by the Natural Science Fund for Young Scholars of Fujian Province(No. 2011J05018)the Fund for Young Scholars from Fujian Agriculture and Forestry University (No. 2011xjj06)
文摘The assembly of metal ions Zn2＋, Co2＋ and H2E2Ge2O3 ligand under mild hydro- thermal conditions leads to a mixed 3D transition zinc-cobalt-organogermanate framework, Zn0.88Co0.12（E2Ge2O3） （1, E = -CH2CH2COO-）. The structure was determined by single-crystal X-ray diffraction and further characterized by IR spectroscopy, elemental analysis, energy- dispersive X-ray analysis, inductively coupled plasma, powder X-ray diffraction, thermogra- vimetric analysis and fluorescence spectroscopy. Compound 1 crystallizes in the chiral space group P212121, with a = 4.9096（5）, b = 8.9031（11）, c = 24.046（3） A, V = 1051.0（2） A3, C6H8Ge2O7Zn0.88Co0.12, Mr = 401.88, Z = 4, Dc = 2.540 g.cm-1,μ = 7.875 mm-1, F（000） = 775, GOF= 1.016, the final R = 0.0324 and wR = 0.0642. The structure ofl is built up by Ge-O sheets with Ge6 rings and Zn/Co-carboxyl layers. It should be mentioned that although the whole E2Ge2O32- ligand exhibits only one kind of coordination mode, it plays two roles in forming the structure： SBU and linker. In this situation, the E group of H2E2Ge2O3 ligand becomes a determining factor for structural dimensionality. In addition, it displays blue-violet emission light and shows high thermostability.
