We used the surface-pretreated graphite paper(Gp)as a carrier and loaded BiOCl with high selectivity to Cl^(-)on its surface by solvothermal method to form BiOCl@Gp electrode.The morphology,structure,and composition o...We used the surface-pretreated graphite paper(Gp)as a carrier and loaded BiOCl with high selectivity to Cl^(-)on its surface by solvothermal method to form BiOCl@Gp electrode.The morphology,structure,and composition of the materials were characterized by scanning electron microscopy and nitrogen adsorption/desorption,and the results showed that the spherical BiOCl particles were uniformly dispersed on the surface of the Gp,forming a mesoporous BiOCl@Gp composite with a specific surface area of 22.82 m^(2)/g and a pore volume of 0.043 cm3/g.Furthermore,cyclic voltammetry and electrochemical impedance spectroscopy were used to test the electrochemical properties of the composites,and the stability of BiOCl and the high conductivity of Gp were synergistic,the BiOCl@Gp exhibited a specific capacitance of 30.2 F·g^(-1) at a current density of 0.5 A·g^(-1),and the selectivity of the BiOCl@Gp materials for Cl^(-)was significantly higher than that of SO_(4)^(2-),NO_(2)^(-),and HCO_(3)^(-).Therefore,BiOCl@Gp composite electrode materials can be used for the selective adsorption of Cl^(-)in wastewater,in order to achieve efficient wastewater recycling.展开更多
以碱式碳酸镍为原料,采用热分解法制备氧化亚镍(NiO)粉末。应用XRD和SEM分别对NiO晶体结构和形貌进行分析,系统研究了热分解温度、分解时间和压力对氧化亚镍晶体结构、粒径和形貌的影响规律。结果表明:碱式碳酸镍热分解温度越高,分解时...以碱式碳酸镍为原料,采用热分解法制备氧化亚镍(NiO)粉末。应用XRD和SEM分别对NiO晶体结构和形貌进行分析,系统研究了热分解温度、分解时间和压力对氧化亚镍晶体结构、粒径和形貌的影响规律。结果表明:碱式碳酸镍热分解温度越高,分解时间越长,系统压力越小,产物NiO结晶越完整,NiO的颗粒粒径越大。低温热分解过程中会有Ni_2O_3出现,但压力降低有利于减少N_i2O_3的生成。当压力为1 k Pa、热解温度为573 K、热解时间为1 h时,得到的NiO为无规则形状,结晶完整,纯度较高,其颗粒粒径为1~4μm。展开更多
To solve the problem of the low added value Zn-containing rotary hearth furnace(RHF)dust,two deep eutectic solvents(DESs)were employed,such as choline chloride-urea(ChCl-urea)and choline chloride-oxalic acid dihydrate...To solve the problem of the low added value Zn-containing rotary hearth furnace(RHF)dust,two deep eutectic solvents(DESs)were employed,such as choline chloride-urea(ChCl-urea)and choline chloride-oxalic acid dihydrate(CC-OA)solvent and Zn-containing RHF dust(water-washed)as the research target.Then,we prepared ZnO nanoparticles using two DESs or their combination,namely,ChCl-urea(Method A),CC-OA(Method B),first CC-OA and then ChCl-urea(Method B-A)and first ChCl-urea and then CCOA(Method A-B),respectively.The effects of these methods on the properties of as-obtained precursors and ZnO nanoparticles were investigated in detail.The results indicated that the precursor obtained by Method A was Zn_(4)CO_(3)(OH)_(6)·H_(2)O,and those by Methods B,B-A,and A-B were all ZnC_(2)O_(4)·2H_(2)O.Moreover,the decomposition steps of the last three methods were similar.The ZnO contents of 95.486%,99.768%,99.733%,and 99.76%were obtained by Methods A,B,B-A,and A-B,respectively.Methods A,B,and B-A led to the formation of spherical and agglomerated ZnO nanoparticles with normal size distributions,where Method B showed the best distribution with an average diameter 25 nm.The ZnO nanoparticles obtained by the Method A-B did not possess good properties.展开更多
基金Funded by the National Natural Science Foundation of China(No.52072180)the Graduate Research and Innovation Projects of Jiangsu Province(No.KYCX21_3461)。
文摘We used the surface-pretreated graphite paper(Gp)as a carrier and loaded BiOCl with high selectivity to Cl^(-)on its surface by solvothermal method to form BiOCl@Gp electrode.The morphology,structure,and composition of the materials were characterized by scanning electron microscopy and nitrogen adsorption/desorption,and the results showed that the spherical BiOCl particles were uniformly dispersed on the surface of the Gp,forming a mesoporous BiOCl@Gp composite with a specific surface area of 22.82 m^(2)/g and a pore volume of 0.043 cm3/g.Furthermore,cyclic voltammetry and electrochemical impedance spectroscopy were used to test the electrochemical properties of the composites,and the stability of BiOCl and the high conductivity of Gp were synergistic,the BiOCl@Gp exhibited a specific capacitance of 30.2 F·g^(-1) at a current density of 0.5 A·g^(-1),and the selectivity of the BiOCl@Gp materials for Cl^(-)was significantly higher than that of SO_(4)^(2-),NO_(2)^(-),and HCO_(3)^(-).Therefore,BiOCl@Gp composite electrode materials can be used for the selective adsorption of Cl^(-)in wastewater,in order to achieve efficient wastewater recycling.
文摘以碱式碳酸镍为原料,采用热分解法制备氧化亚镍(NiO)粉末。应用XRD和SEM分别对NiO晶体结构和形貌进行分析,系统研究了热分解温度、分解时间和压力对氧化亚镍晶体结构、粒径和形貌的影响规律。结果表明:碱式碳酸镍热分解温度越高,分解时间越长,系统压力越小,产物NiO结晶越完整,NiO的颗粒粒径越大。低温热分解过程中会有Ni_2O_3出现,但压力降低有利于减少N_i2O_3的生成。当压力为1 k Pa、热解温度为573 K、热解时间为1 h时,得到的NiO为无规则形状,结晶完整,纯度较高,其颗粒粒径为1~4μm。
基金Fund by Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX20_3134)
文摘To solve the problem of the low added value Zn-containing rotary hearth furnace(RHF)dust,two deep eutectic solvents(DESs)were employed,such as choline chloride-urea(ChCl-urea)and choline chloride-oxalic acid dihydrate(CC-OA)solvent and Zn-containing RHF dust(water-washed)as the research target.Then,we prepared ZnO nanoparticles using two DESs or their combination,namely,ChCl-urea(Method A),CC-OA(Method B),first CC-OA and then ChCl-urea(Method B-A)and first ChCl-urea and then CCOA(Method A-B),respectively.The effects of these methods on the properties of as-obtained precursors and ZnO nanoparticles were investigated in detail.The results indicated that the precursor obtained by Method A was Zn_(4)CO_(3)(OH)_(6)·H_(2)O,and those by Methods B,B-A,and A-B were all ZnC_(2)O_(4)·2H_(2)O.Moreover,the decomposition steps of the last three methods were similar.The ZnO contents of 95.486%,99.768%,99.733%,and 99.76%were obtained by Methods A,B,B-A,and A-B,respectively.Methods A,B,and B-A led to the formation of spherical and agglomerated ZnO nanoparticles with normal size distributions,where Method B showed the best distribution with an average diameter 25 nm.The ZnO nanoparticles obtained by the Method A-B did not possess good properties.
