Mercury telluride （HgTe） nanoplatelets were obtained via a facile solvothermal reaction of mercury（I） chloride and tellurium powder in ethylenediamine （en）. Mercury（I） was first applied as the mercury sources ...Mercury telluride （HgTe） nanoplatelets were obtained via a facile solvothermal reaction of mercury（I） chloride and tellurium powder in ethylenediamine （en）. Mercury（I） was first applied as the mercury sources to prepare nanocrystal HgTe; moreover, the proposed mechanism for the fabrication of the sample was discussed in detail. The HgTe nanoplatelets were characterized by powder X-ray diffraction （PXRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, high-resolution transmission electron microscopy （HRTEM） and Fourier transform infrared spectroscopy （FT-IR）. The absence of IR absorption may render the title nanocrystal useful as an IR transparent material in the region.展开更多
The solvothermal technique was used for the synthesis of [Mn(en)\-3]CdSnTe\-4 (Ⅰ). The crystal structure has been determined by single crystal X ray diffraction techniques. The crystal belongs to the triclinic, space...The solvothermal technique was used for the synthesis of [Mn(en)\-3]CdSnTe\-4 (Ⅰ). The crystal structure has been determined by single crystal X ray diffraction techniques. The crystal belongs to the triclinic, space group \%P\%1(No.1) with unit cell \%a=9.134(2), b=10.085(3), c=12.691(3)(), α=73.52(2)°, β=86.05(2)°, γ=76.43(2)°, V =1089.7(5)\+3, Z=2. The results show that the structure is an one dimensional framework containing a linear chain Zintl anion, \+1\-∞[CdSnTe\-4]\+\{2-\} and a complex cation, \+1\-∞[Mn(en)\-3]\+\{2+\}, Optical studies on the powder sample of Ⅰ suggested that the compound is a semiconductor with a band gap of 1.45 eV.展开更多
This paper introduces a facile surfactant-free method for fabrication of different types of Ni-based nanostructures including metallic nickel nanoparticles (MNNP), nickel oxide nanoparticles (NONP) and chip-like nicke...This paper introduces a facile surfactant-free method for fabrication of different types of Ni-based nanostructures including metallic nickel nanoparticles (MNNP), nickel oxide nanoparticles (NONP) and chip-like nickel oxide nanoflakes (CNONF) by solvothermal technique at 190°C. Nickel acetyl acetonate (Ni(ac ac)2) was used as nickel precursor for both MNNP and CNONF and NiCO3●2Ni(OH)2●nH2O was utilized for NONP. Organic alcohols including 1-hexanol and benzyl alcohol were used as solvent to produce all powders. The crystallite sizes of MNNP, NONP and CNONF were determined by X-ray diffraction (XRD) to be 30, 9 and 27 nm, respectively. Electron microscopy indicated final particle sizes of 80 nm and 20 nm for MNNP and NONP, respectively and a thickness-layer less than 90 nm for CNONF. Brunauer-Emmett-Teller (BET) experiment determined a high surface area of 68 m2/gr for CNONF.展开更多
通过溶剂热法,以含有PVP的醇类作溶剂,以CuCl_2·2H_2O、Zn(Ac)_2·2H_2O、SnCl_4·5H_2O作金属源,硫脲作硫源,在一定条件下反应,通过XRD、Raman、SEM、EDS、TEM、UV-Vis以及电化学分析系统研究醇类溶剂溶解度对CZTS颗粒的...通过溶剂热法,以含有PVP的醇类作溶剂,以CuCl_2·2H_2O、Zn(Ac)_2·2H_2O、SnCl_4·5H_2O作金属源,硫脲作硫源,在一定条件下反应,通过XRD、Raman、SEM、EDS、TEM、UV-Vis以及电化学分析系统研究醇类溶剂溶解度对CZTS颗粒的物相、结构、形貌以及光电性能的影响。结果表明:所选溶剂溶解度不同,对得到的CZTS颗粒的结晶性、形貌、原子比以及光电性能均有相应的影响;当选择溶解度为32.1的乙二醇作溶剂时,合成的颗粒结晶性较好,颗粒形貌为表面嵌有薄片的微球,颗粒表面缺陷形态为贫铜富锌结构,光学带隙为1.47 e V,与太阳能电池所需的最佳带隙接近,薄膜电阻率为45.86Ω·m。展开更多
Here,carbon dots(CDs) only or nanocomposites of CDs and TiO_(2)(CDs-TiO_(2)) were used to decorate titanium dioxide nanotube arrays(TiO_(2)NTs) in situ by solvothermal method.Two initial states of TiO_(2)NTs were prep...Here,carbon dots(CDs) only or nanocomposites of CDs and TiO_(2)(CDs-TiO_(2)) were used to decorate titanium dioxide nanotube arrays(TiO_(2)NTs) in situ by solvothermal method.Two initial states of TiO_(2)NTs were prepared for contrast,including the amorphous TiO_(2)NTs(TiO_(2)NTs-0) just experienced anodic oxidation process and that further calcined TiO_(2)NTs(TiO_(2)NTs-450).It was found that the newborn CDs or CDs-TiO_(2)were more likely to anchor on TiO_(2)NTs-0 than the calcined TiO_(2)NTs-450,and more Ti-C bonds were found in the composites which were derived from TiO_(2)NTs-0 after the solvothermal treatment.An evident photocurrent could be demonstrated for either CDs or CDs-TiO_(2)decorated TiO_(2)NTs once exposed to visible light.And CDs-TiO_(2)NTs-0 showed the highest photocurrent density(4.51 μA·cm^(-2)).However,the results of photodegradation measurements revealed that CDs-TiO_(2)decorated TiO_(2)NTs with different initial states(especially CDs-TiO_(2)-TiO_(2)NTs-0) showed more excellent photocatalytic activity under both ultraviolet(UV) and visible light illumination.展开更多
基金supported by the NSF for Distinguished Young Scientist of China (20425104)Fujian Key Laboratory of Nanomaterials (2006L2005)NSF of Fujian Province (2004J039)
文摘Mercury telluride （HgTe） nanoplatelets were obtained via a facile solvothermal reaction of mercury（I） chloride and tellurium powder in ethylenediamine （en）. Mercury（I） was first applied as the mercury sources to prepare nanocrystal HgTe; moreover, the proposed mechanism for the fabrication of the sample was discussed in detail. The HgTe nanoplatelets were characterized by powder X-ray diffraction （PXRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, high-resolution transmission electron microscopy （HRTEM） and Fourier transform infrared spectroscopy （FT-IR）. The absence of IR absorption may render the title nanocrystal useful as an IR transparent material in the region.
文摘The solvothermal technique was used for the synthesis of [Mn(en)\-3]CdSnTe\-4 (Ⅰ). The crystal structure has been determined by single crystal X ray diffraction techniques. The crystal belongs to the triclinic, space group \%P\%1(No.1) with unit cell \%a=9.134(2), b=10.085(3), c=12.691(3)(), α=73.52(2)°, β=86.05(2)°, γ=76.43(2)°, V =1089.7(5)\+3, Z=2. The results show that the structure is an one dimensional framework containing a linear chain Zintl anion, \+1\-∞[CdSnTe\-4]\+\{2-\} and a complex cation, \+1\-∞[Mn(en)\-3]\+\{2+\}, Optical studies on the powder sample of Ⅰ suggested that the compound is a semiconductor with a band gap of 1.45 eV.
文摘This paper introduces a facile surfactant-free method for fabrication of different types of Ni-based nanostructures including metallic nickel nanoparticles (MNNP), nickel oxide nanoparticles (NONP) and chip-like nickel oxide nanoflakes (CNONF) by solvothermal technique at 190°C. Nickel acetyl acetonate (Ni(ac ac)2) was used as nickel precursor for both MNNP and CNONF and NiCO3●2Ni(OH)2●nH2O was utilized for NONP. Organic alcohols including 1-hexanol and benzyl alcohol were used as solvent to produce all powders. The crystallite sizes of MNNP, NONP and CNONF were determined by X-ray diffraction (XRD) to be 30, 9 and 27 nm, respectively. Electron microscopy indicated final particle sizes of 80 nm and 20 nm for MNNP and NONP, respectively and a thickness-layer less than 90 nm for CNONF. Brunauer-Emmett-Teller (BET) experiment determined a high surface area of 68 m2/gr for CNONF.
基金supported by the National Natural Science Foundation of China (12264052)the Science and Technology Research Project of Jiangxi Provincial Department of Education (GJJ211607)。
文摘通过溶剂热法,以含有PVP的醇类作溶剂,以CuCl_2·2H_2O、Zn(Ac)_2·2H_2O、SnCl_4·5H_2O作金属源,硫脲作硫源,在一定条件下反应,通过XRD、Raman、SEM、EDS、TEM、UV-Vis以及电化学分析系统研究醇类溶剂溶解度对CZTS颗粒的物相、结构、形貌以及光电性能的影响。结果表明:所选溶剂溶解度不同,对得到的CZTS颗粒的结晶性、形貌、原子比以及光电性能均有相应的影响;当选择溶解度为32.1的乙二醇作溶剂时,合成的颗粒结晶性较好,颗粒形貌为表面嵌有薄片的微球,颗粒表面缺陷形态为贫铜富锌结构,光学带隙为1.47 e V,与太阳能电池所需的最佳带隙接近,薄膜电阻率为45.86Ω·m。
基金financially supported by the National Natural Science Foundation of China(No.51502345)the Tianjin Sciences Foundation(No.16JCQNJC03100)。
文摘Here,carbon dots(CDs) only or nanocomposites of CDs and TiO_(2)(CDs-TiO_(2)) were used to decorate titanium dioxide nanotube arrays(TiO_(2)NTs) in situ by solvothermal method.Two initial states of TiO_(2)NTs were prepared for contrast,including the amorphous TiO_(2)NTs(TiO_(2)NTs-0) just experienced anodic oxidation process and that further calcined TiO_(2)NTs(TiO_(2)NTs-450).It was found that the newborn CDs or CDs-TiO_(2)were more likely to anchor on TiO_(2)NTs-0 than the calcined TiO_(2)NTs-450,and more Ti-C bonds were found in the composites which were derived from TiO_(2)NTs-0 after the solvothermal treatment.An evident photocurrent could be demonstrated for either CDs or CDs-TiO_(2)decorated TiO_(2)NTs once exposed to visible light.And CDs-TiO_(2)NTs-0 showed the highest photocurrent density(4.51 μA·cm^(-2)).However,the results of photodegradation measurements revealed that CDs-TiO_(2)decorated TiO_(2)NTs with different initial states(especially CDs-TiO_(2)-TiO_(2)NTs-0) showed more excellent photocatalytic activity under both ultraviolet(UV) and visible light illumination.
