以柠檬酸为络合剂,采用溶胶-凝胶法制备了钙钛矿型光催化剂Ca 0.99 La 0.01 TiO 3,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱仪(UV-Vis DRS)等对光催化剂材料进行了表征,并考察了N掺杂对光催化剂催化效果的影响...以柠檬酸为络合剂,采用溶胶-凝胶法制备了钙钛矿型光催化剂Ca 0.99 La 0.01 TiO 3,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱仪(UV-Vis DRS)等对光催化剂材料进行了表征,并考察了N掺杂对光催化剂催化效果的影响,探究了可见光条件下,Ca 0.99 La 0.01 TiO 3-x N x在不同Pt负载量及不同种类牺牲剂中光催化分解水的产氢量,并进行相关荧光猝灭分析.结果表明,在可见光条件下,Pt负载量为1%且掺杂N的钙钛矿光催化剂在Na 2 SO 3/Na 2 S作为牺牲剂时,光催化分解水的产氢量最高.展开更多
In the solvothermal synthesis process, the effect of NaOH dosages of from 0.3 g to 4.0 g on the morphology evolution(from nanoparticles to octahedra) of Fe3O4 crystals was carefully investigated. Meanwhile, the grow...In the solvothermal synthesis process, the effect of NaOH dosages of from 0.3 g to 4.0 g on the morphology evolution(from nanoparticles to octahedra) of Fe3O4 crystals was carefully investigated. Meanwhile, the growth process of Fe3O4 crystals at different reaction time was also investigated. Furthermore, it has been found that the particle size and crystallinity of Fe3O4 crystals can be controlled by the dosages of NaOH. In this paper, the increases of both the reaction time and the NaOH concentrations correspond to a minimization process of surface energy for Fe3O4 crystals. During the synthesis process, the addition of N2Ha·H2O and ethylene glycol in the magnetite not only facilitated the narrow distribution of particle size but also contributed to the formation of incontinuous multicavities with a diameter of about 5 nm.展开更多
文摘以柠檬酸为络合剂,采用溶胶-凝胶法制备了钙钛矿型光催化剂Ca 0.99 La 0.01 TiO 3,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱仪(UV-Vis DRS)等对光催化剂材料进行了表征,并考察了N掺杂对光催化剂催化效果的影响,探究了可见光条件下,Ca 0.99 La 0.01 TiO 3-x N x在不同Pt负载量及不同种类牺牲剂中光催化分解水的产氢量,并进行相关荧光猝灭分析.结果表明,在可见光条件下,Pt负载量为1%且掺杂N的钙钛矿光催化剂在Na 2 SO 3/Na 2 S作为牺牲剂时,光催化分解水的产氢量最高.
基金Supported by the National Natural Science Foundation of China(No.51501068).
文摘In the solvothermal synthesis process, the effect of NaOH dosages of from 0.3 g to 4.0 g on the morphology evolution(from nanoparticles to octahedra) of Fe3O4 crystals was carefully investigated. Meanwhile, the growth process of Fe3O4 crystals at different reaction time was also investigated. Furthermore, it has been found that the particle size and crystallinity of Fe3O4 crystals can be controlled by the dosages of NaOH. In this paper, the increases of both the reaction time and the NaOH concentrations correspond to a minimization process of surface energy for Fe3O4 crystals. During the synthesis process, the addition of N2Ha·H2O and ethylene glycol in the magnetite not only facilitated the narrow distribution of particle size but also contributed to the formation of incontinuous multicavities with a diameter of about 5 nm.