H3PW12O40/TiO2-SiO2 was synthesized by impregnation method which significantly improved the catalytic activity under simulated natural light. The prop- erties of the samples were characterized by Fourier trans- form i...H3PW12O40/TiO2-SiO2 was synthesized by impregnation method which significantly improved the catalytic activity under simulated natural light. The prop- erties of the samples were characterized by Fourier trans- form infrared spectra （FTIR）, X-ray powder diffraction pattern （XRD）, Scanning electron micrographs （SEM）, and Zeta potential. Degradation of methyl violet was used as a probe reaction to explore the influencing factors on the photodegradation reaction. The results show that the opti- mal conditions are as follows： initial concentration of methyl violet of 10 mg·L^-1, pH of 3.0, catalyst dosage of 2.9 g·L^-1, and light irradiation time of 2.5 h. Under these conditions, the degradation rate of methyl violet is 95.4 %. The reaction on photodegradation for methyl violet can be expressed as the first-order kinetic model, and the possible mechanism for the photocatalysis under simulated natural light is suggested. After used continuously for five times, the catalyst keeps the inherent photocatalytic activity for degradation of dyes. The photodegradation of methyl orange, methyl red, naphthol green B, and methylene blue was also tested, and the degradation rate of dyes can reach 81%-100%.展开更多
为探究不同反应条件对MOFs微观结构和宏观性能的影响,在不同反应条件下,以硫酸铜(CuSO_(4)·5H_(2)O)和6-(吡啶-3′-基)间苯二甲酸(H_(2)L)为材料,制备了2种金属有机框架材料(MOFs){[Cu_(2)(L)_(2)·C _(2) H _(3) N]}n(1)和{[C...为探究不同反应条件对MOFs微观结构和宏观性能的影响,在不同反应条件下,以硫酸铜(CuSO_(4)·5H_(2)O)和6-(吡啶-3′-基)间苯二甲酸(H_(2)L)为材料,制备了2种金属有机框架材料(MOFs){[Cu_(2)(L)_(2)·C _(2) H _(3) N]}n(1)和{[Cu(HL)_(2)]}n(2),并对合成的金属有机框架材料1和2进行了结构分析、TGA和FTIR表征以及对染料的吸附性能研究。单晶衍射数据分析表明:配合物1和2都属单斜晶系,P 21/c空间群。配合物1是一种基于双核轮桨次级构筑单元[Cu_(2)(COO)_(4)]构筑的三维紧密堆积化合物,配合物2由于配体部分质子化,结构中存在氢键[O_(3)—H…O_(4)],将二维层状网络结构连接成三维结构。配合物1是rtl拓扑类型的网络结构,拓扑符号为(42.610.83);配合物2是sql拓扑类型的网络结构,拓扑符号为(4^(4).6^(2))。2种配合物在相同时间间隔下对不同染料降解性能表明配合物2对水溶液中的孔雀石绿具有一定的化学吸附降解能力。展开更多
A water-soluble metallo-supramolecular polymer MSP-f-6Np,which possesses a regular pore aperture of 1.4 nm,has been assembled from a structurally flexible naphthalene-appended[Ru(bipy)3]^2+complex and cucurbit[8]uril....A water-soluble metallo-supramolecular polymer MSP-f-6Np,which possesses a regular pore aperture of 1.4 nm,has been assembled from a structurally flexible naphthalene-appended[Ru(bipy)3]^2+complex and cucurbit[8]uril.As the first periodic metallo-supramolecular polymer formed by a flexible building block,MSP-f-6Np exhibits a hydrodynamic diameter of 122 and 164 nm at 0.1 and 2.0 mM of the monomer concentrations.Synchrotron small angle X-ray scattering experiments confirm that MSP-f-6Np possesses porosity periodicity in both the solution and solid states.Compared with a control,the new highly ordered porous system displays enhanced photocatalytic activity for the degradation of organic dyes.展开更多
基金financially supported by the Hubei Key Laboratory of Pollutant Analysis & Reuse Technology (No.KL2013M08)
文摘H3PW12O40/TiO2-SiO2 was synthesized by impregnation method which significantly improved the catalytic activity under simulated natural light. The prop- erties of the samples were characterized by Fourier trans- form infrared spectra （FTIR）, X-ray powder diffraction pattern （XRD）, Scanning electron micrographs （SEM）, and Zeta potential. Degradation of methyl violet was used as a probe reaction to explore the influencing factors on the photodegradation reaction. The results show that the opti- mal conditions are as follows： initial concentration of methyl violet of 10 mg·L^-1, pH of 3.0, catalyst dosage of 2.9 g·L^-1, and light irradiation time of 2.5 h. Under these conditions, the degradation rate of methyl violet is 95.4 %. The reaction on photodegradation for methyl violet can be expressed as the first-order kinetic model, and the possible mechanism for the photocatalysis under simulated natural light is suggested. After used continuously for five times, the catalyst keeps the inherent photocatalytic activity for degradation of dyes. The photodegradation of methyl orange, methyl red, naphthol green B, and methylene blue was also tested, and the degradation rate of dyes can reach 81%-100%.
基金supported by the National Natural Science Foundation of China (21432004, 21529201, 21890732)the support by the Molecular Foundry, the Office of Science, Office of Basic Energy Sciences, of the U.S.+2 种基金Department of Energy (DE-AC0205CH11231)support by the National Institute of General Medical Sciences (NIGMS) project advanced light sources efficiently networking advanced beam line experiments (ALS-ENABLE) (P30 GM124169)a High-End Instrumentation(S10OD018483)
文摘A water-soluble metallo-supramolecular polymer MSP-f-6Np,which possesses a regular pore aperture of 1.4 nm,has been assembled from a structurally flexible naphthalene-appended[Ru(bipy)3]^2+complex and cucurbit[8]uril.As the first periodic metallo-supramolecular polymer formed by a flexible building block,MSP-f-6Np exhibits a hydrodynamic diameter of 122 and 164 nm at 0.1 and 2.0 mM of the monomer concentrations.Synchrotron small angle X-ray scattering experiments confirm that MSP-f-6Np possesses porosity periodicity in both the solution and solid states.Compared with a control,the new highly ordered porous system displays enhanced photocatalytic activity for the degradation of organic dyes.
