机构学科前沿性评测能够为科技管理部门明确学科发展重点,制定学科发展规划和科技发展政策提供借鉴和参考。基于ESI Research Fronts中学科研究前沿的共被引关系,构建研究前沿的共被引矩阵,利用VOSviewer生成学科研究前沿的全局知识图谱...机构学科前沿性评测能够为科技管理部门明确学科发展重点,制定学科发展规划和科技发展政策提供借鉴和参考。基于ESI Research Fronts中学科研究前沿的共被引关系,构建研究前沿的共被引矩阵,利用VOSviewer生成学科研究前沿的全局知识图谱,分别计算并可视化机构在各前沿领域中的前沿表现度和前沿关注度。最后,以中国农业大学为例进行实证分析。揭示了机构学科研究前沿的知识结构和研究布局,从研究领域的层次上更为精细地评测机构的学术影响力,为机构的学科发展规划和科技政策提供更有效的支持。展开更多
Zeolite FSM 16 was synthesized by reconstruction of layered silicate in the presence of organic surfactant. With partial replacement of Ti 3+ with organic cations, TiO 2 nano structured particles were simultaneously b...Zeolite FSM 16 was synthesized by reconstruction of layered silicate in the presence of organic surfactant. With partial replacement of Ti 3+ with organic cations, TiO 2 nano structured particles were simultaneously built in the channel of the zeolite as the framework of the zeolite was formed. XRD, IR and Raman spectroscopic characterizations indicate that SiO 4 tetrahedron may be distorted and transferred from Q 3 to Q 2 form due to the pucker and reconstruction of the layered structure. The formation of TiO 2 nano structured particles had no influence on the formation of zeolite framework, however, the interaction obviously occurred between TiO 2 nano structured particles and zeolite framework.展开更多
CO adsorption on β zeolite with highly dispersed CuCl 2·2H 2O was studied by IR spectroscopy. The results of XRD and 29 Si NMR indicate that CuCl 2·2H 2O is highly dispersed into β zeolite channel as a mon...CO adsorption on β zeolite with highly dispersed CuCl 2·2H 2O was studied by IR spectroscopy. The results of XRD and 29 Si NMR indicate that CuCl 2·2H 2O is highly dispersed into β zeolite channel as a monolayer. The IR spectra of adsorbed CO on the zeolites demonstrate that two distinct types of adsorption sites exist in the zeolites, i.e ., cation and non cation exchange sites. Two simultaneous processes, solid phase ion exchange and molecular diffusion, are involved in the dispersion of CuCl 2·2H 2O.展开更多
文摘机构学科前沿性评测能够为科技管理部门明确学科发展重点,制定学科发展规划和科技发展政策提供借鉴和参考。基于ESI Research Fronts中学科研究前沿的共被引关系,构建研究前沿的共被引矩阵,利用VOSviewer生成学科研究前沿的全局知识图谱,分别计算并可视化机构在各前沿领域中的前沿表现度和前沿关注度。最后,以中国农业大学为例进行实证分析。揭示了机构学科研究前沿的知识结构和研究布局,从研究领域的层次上更为精细地评测机构的学术影响力,为机构的学科发展规划和科技政策提供更有效的支持。
文摘Zeolite FSM 16 was synthesized by reconstruction of layered silicate in the presence of organic surfactant. With partial replacement of Ti 3+ with organic cations, TiO 2 nano structured particles were simultaneously built in the channel of the zeolite as the framework of the zeolite was formed. XRD, IR and Raman spectroscopic characterizations indicate that SiO 4 tetrahedron may be distorted and transferred from Q 3 to Q 2 form due to the pucker and reconstruction of the layered structure. The formation of TiO 2 nano structured particles had no influence on the formation of zeolite framework, however, the interaction obviously occurred between TiO 2 nano structured particles and zeolite framework.
文摘CO adsorption on β zeolite with highly dispersed CuCl 2·2H 2O was studied by IR spectroscopy. The results of XRD and 29 Si NMR indicate that CuCl 2·2H 2O is highly dispersed into β zeolite channel as a monolayer. The IR spectra of adsorbed CO on the zeolites demonstrate that two distinct types of adsorption sites exist in the zeolites, i.e ., cation and non cation exchange sites. Two simultaneous processes, solid phase ion exchange and molecular diffusion, are involved in the dispersion of CuCl 2·2H 2O.
