The Experts below are selected from a list of 32130 Experts worldwide ranked by ideXlab platform
Linbing Sun - One of the best experts on this subject based on the ideXlab platform.
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endowing cu btc with improved hydrothermal stability and catalytic activity hybridization with natural clay attapulgite via vapor induced crystallization
ACS Sustainable Chemistry & Engineering, 2018Co-Authors: Xiaoyan Xie, Xiaoqin Liu, Xinyu Qian, Linbing SunAbstract:Metal–organic frameworks (MOFs) have drawn much attention for their highly promising applications, but the applications are often obstructed by the congenitally hydrothermal instability of the MOFs. Hybridizing the MOFs with other materials has been proved to be effective to solve the hydrothermal problems. Herein, a vapor-induced crystallization (VIC) method is employed for the first time to fabricate the hybrid MOFs based on the Cu-BTC and the natural clay attapulgite (NCA). Compared with the traditional solvothermal method for the hybridization, the VIC one has the obvious advantages of both reducing the solvent consumption and inducing the crystals self-repairing to generate perfect crystals of the hybrid MOFs. With an appropriate content of the NCA, the hybrid MOFs are proved to be highly stable even undergoing the hot water vapor (90 °C) for 12 h. The hybrid MOFs also exhibit the improved catalytic activity in catalyzing the styrene oxide ring-opening. The molar conversion of the styrene oxide over ...
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Endowing Cu-BTC with Improved Hydrothermal Stability and Catalytic Activity: Hybridization with Natural Clay Attapulgite via Vapor-Induced Crystallization
2018Co-Authors: Xiaoyan Xie, Xiaoqin Liu, Xinyu Qian, Linbing SunAbstract:Metal–organic frameworks (MOFs) have drawn much attention for their highly promising applications, but the applications are often obstructed by the congenitally hydrothermal instability of the MOFs. Hybridizing the MOFs with other materials has been proved to be effective to solve the hydrothermal problems. Herein, a vapor-induced crystallization (VIC) method is employed for the first time to fabricate the hybrid MOFs based on the Cu-BTC and the natural clay attapulgite (NCA). Compared with the traditional solvothermal method for the hybridization, the VIC one has the obvious advantages of both reducing the solvent consumption and inducing the crystals self-repairing to generate perfect crystals of the hybrid MOFs. With an appropriate content of the NCA, the hybrid MOFs are proved to be highly stable even undergoing the hot water vapor (90 °C) for 12 h. The hybrid MOFs also exhibit the improved catalytic activity in catalyzing the styrene oxide ring-opening. The molar conversion of the styrene oxide over the hybrid MOF reaches 93.8% within 20 min, even higher than that of the unadulterated Cu-BTC (68.0%). These results indicate the promising application of the hybrid MOFs as the hydrothermal-stable and highly active heterogeneous catalysts
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metal organic frameworks for heterogeneous basic catalysis
Chemical Reviews, 2017Co-Authors: Li Zhu, Hailong Jiang, Xiaoqin Liu, Linbing SunAbstract:Great attention has been given to metal–organic frameworks (MOFs)-derived solid bases because of their attractive structure and catalytic performance in various organic reactions. The extraordinary skeleton structure of MOFs provides many possibilities for incorporation of diverse basic functionalities, which is unachievable for conventional solid bases. The past decade has witnessed remarkable advances in this vibrant research area; however, MOFs for heterogeneous basic catalysis have never been reviewed until now. Therefore, a review summarizing MOFs-derived base catalysts is highly expected. In this review, we present an overview of the recent progress in MOFs-derived solid bases covering preparation, characterization, and catalytic applications. In the preparation section, the solid bases are divided into two categories, namely, MOFs with intrinsic basicity and MOFs with modified basicity. The basicity can originate from either metal sites or organic ligands. Different approaches used for generation o...
Rong Cao - One of the best experts on this subject based on the ideXlab platform.
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metal organic frameworks and porous organic polymers for sustainable fixation of carbon dioxide into cyclic carbonates
Coordination Chemistry Reviews, 2017Co-Authors: Jun Liang, Yuanbiao Huang, Rong CaoAbstract:Abstract The capture and chemical fixation of carbon dioxide (CO2) into cyclic carbonates is considered to be a promising way to alleviate CO2 concerns and produce fine chemicals. This process can be effectively promoted by various kinds of newly developed porous heterogeneous catalysts with Lewis acidic and nucleophilic sites. These porous catalytic materials include metal–organic frameworks (MOFs), covalent-organic frameworks (COFs), nanoporous ionic organic networks (NIONs) and amorphous porous organic polymers. In this review, we have briefly classified these materials based on their different structural features and compositions. The syntheses and catalytic performances of these porous heterogeneous catalysts are described from the perspective of catalyst design. This review will guide material scientists attempting to design more efficient porous catalysts for CO2 capture and conversions.
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metal organic frameworks based on flexible ligands fl MOFs structures and applications
Chemical Society Reviews, 2014Co-Authors: Zujin Lin, Maochun Hong, Rong CaoAbstract:Metal–organic frameworks (MOFs), also known as coordination polymers (CPs), are crystalline materials constructed from metal ions or clusters bridged by organic ligands to form one-, two-, or three-dimensional infinite networks. In contrast with the prolific production of MOFs based on rigid ligands (RL-MOFs), the design, syntheses and applications of MOFs based on flexible ligands (FL-MOFs) are somewhat overlooked. Although sacrificing a measure of control, the use of flexible ligands may provide unique opportunities to obtain novel crystalline framework materials exhibiting desirable attributes. In this review, emphasis has been placed on the design and the structural diversity of FL-MOFs. Homochiral FL-MOFs and dynamic frameworks induced by flexible ligands are also briefly outlined. An overview is also shown for the applications of FL-MOFs as platforms for gas adsorption, heterogeneous catalysis, proton conduction etc.
Xiaoqin Liu - One of the best experts on this subject based on the ideXlab platform.
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endowing cu btc with improved hydrothermal stability and catalytic activity hybridization with natural clay attapulgite via vapor induced crystallization
ACS Sustainable Chemistry & Engineering, 2018Co-Authors: Xiaoyan Xie, Xiaoqin Liu, Xinyu Qian, Linbing SunAbstract:Metal–organic frameworks (MOFs) have drawn much attention for their highly promising applications, but the applications are often obstructed by the congenitally hydrothermal instability of the MOFs. Hybridizing the MOFs with other materials has been proved to be effective to solve the hydrothermal problems. Herein, a vapor-induced crystallization (VIC) method is employed for the first time to fabricate the hybrid MOFs based on the Cu-BTC and the natural clay attapulgite (NCA). Compared with the traditional solvothermal method for the hybridization, the VIC one has the obvious advantages of both reducing the solvent consumption and inducing the crystals self-repairing to generate perfect crystals of the hybrid MOFs. With an appropriate content of the NCA, the hybrid MOFs are proved to be highly stable even undergoing the hot water vapor (90 °C) for 12 h. The hybrid MOFs also exhibit the improved catalytic activity in catalyzing the styrene oxide ring-opening. The molar conversion of the styrene oxide over ...
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Endowing Cu-BTC with Improved Hydrothermal Stability and Catalytic Activity: Hybridization with Natural Clay Attapulgite via Vapor-Induced Crystallization
2018Co-Authors: Xiaoyan Xie, Xiaoqin Liu, Xinyu Qian, Linbing SunAbstract:Metal–organic frameworks (MOFs) have drawn much attention for their highly promising applications, but the applications are often obstructed by the congenitally hydrothermal instability of the MOFs. Hybridizing the MOFs with other materials has been proved to be effective to solve the hydrothermal problems. Herein, a vapor-induced crystallization (VIC) method is employed for the first time to fabricate the hybrid MOFs based on the Cu-BTC and the natural clay attapulgite (NCA). Compared with the traditional solvothermal method for the hybridization, the VIC one has the obvious advantages of both reducing the solvent consumption and inducing the crystals self-repairing to generate perfect crystals of the hybrid MOFs. With an appropriate content of the NCA, the hybrid MOFs are proved to be highly stable even undergoing the hot water vapor (90 °C) for 12 h. The hybrid MOFs also exhibit the improved catalytic activity in catalyzing the styrene oxide ring-opening. The molar conversion of the styrene oxide over the hybrid MOF reaches 93.8% within 20 min, even higher than that of the unadulterated Cu-BTC (68.0%). These results indicate the promising application of the hybrid MOFs as the hydrothermal-stable and highly active heterogeneous catalysts
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metal organic frameworks for heterogeneous basic catalysis
Chemical Reviews, 2017Co-Authors: Li Zhu, Hailong Jiang, Xiaoqin Liu, Linbing SunAbstract:Great attention has been given to metal–organic frameworks (MOFs)-derived solid bases because of their attractive structure and catalytic performance in various organic reactions. The extraordinary skeleton structure of MOFs provides many possibilities for incorporation of diverse basic functionalities, which is unachievable for conventional solid bases. The past decade has witnessed remarkable advances in this vibrant research area; however, MOFs for heterogeneous basic catalysis have never been reviewed until now. Therefore, a review summarizing MOFs-derived base catalysts is highly expected. In this review, we present an overview of the recent progress in MOFs-derived solid bases covering preparation, characterization, and catalytic applications. In the preparation section, the solid bases are divided into two categories, namely, MOFs with intrinsic basicity and MOFs with modified basicity. The basicity can originate from either metal sites or organic ligands. Different approaches used for generation o...
Omar M Yaghi - One of the best experts on this subject based on the ideXlab platform.
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a titanium organic framework as an exemplar of combining the chemistry of metal and covalent organic frameworks
Journal of the American Chemical Society, 2016Co-Authors: Ha L Nguyen, Felipe Gandara, Hiroyasu Furukawa, Tan Le Hoang Doan, Kyle E Cordova, Omar M YaghiAbstract:A crystalline material with a two-dimensional structure, termed metal–organic framework-901 (MOF-901), was prepared using a strategy that combines the chemistry of MOFs and covalent–organic frameworks (COFs). This strategy involves in situ generation of an amine-functionalized titanium oxo cluster, Ti6O6(OCH3)6(AB)6 (AB = 4-aminobenzoate), which was linked with benzene-1,4-dialdehyde using imine condensation reactions, typical of COFs. The crystal structure of MOF-901 is composed of hexagonal porous layers that are likely stacked in staggered conformation (hxl topology). This MOF represents the first example of combining metal cluster chemistry with dynamic organic covalent bond formation to give a new crystalline, extended framework of titanium metal, which is rarely used in MOFs. The incorporation of Ti(IV) units made MOF-901 useful in the photocatalyzed polymerization of methyl methacrylate (MMA). The resulting polyMMA product was obtained with a high-number-average molar mass (26 850 g mol–1) and low ...
Xiaoyan Xie - One of the best experts on this subject based on the ideXlab platform.
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endowing cu btc with improved hydrothermal stability and catalytic activity hybridization with natural clay attapulgite via vapor induced crystallization
ACS Sustainable Chemistry & Engineering, 2018Co-Authors: Xiaoyan Xie, Xiaoqin Liu, Xinyu Qian, Linbing SunAbstract:Metal–organic frameworks (MOFs) have drawn much attention for their highly promising applications, but the applications are often obstructed by the congenitally hydrothermal instability of the MOFs. Hybridizing the MOFs with other materials has been proved to be effective to solve the hydrothermal problems. Herein, a vapor-induced crystallization (VIC) method is employed for the first time to fabricate the hybrid MOFs based on the Cu-BTC and the natural clay attapulgite (NCA). Compared with the traditional solvothermal method for the hybridization, the VIC one has the obvious advantages of both reducing the solvent consumption and inducing the crystals self-repairing to generate perfect crystals of the hybrid MOFs. With an appropriate content of the NCA, the hybrid MOFs are proved to be highly stable even undergoing the hot water vapor (90 °C) for 12 h. The hybrid MOFs also exhibit the improved catalytic activity in catalyzing the styrene oxide ring-opening. The molar conversion of the styrene oxide over ...
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Endowing Cu-BTC with Improved Hydrothermal Stability and Catalytic Activity: Hybridization with Natural Clay Attapulgite via Vapor-Induced Crystallization
2018Co-Authors: Xiaoyan Xie, Xiaoqin Liu, Xinyu Qian, Linbing SunAbstract:Metal–organic frameworks (MOFs) have drawn much attention for their highly promising applications, but the applications are often obstructed by the congenitally hydrothermal instability of the MOFs. Hybridizing the MOFs with other materials has been proved to be effective to solve the hydrothermal problems. Herein, a vapor-induced crystallization (VIC) method is employed for the first time to fabricate the hybrid MOFs based on the Cu-BTC and the natural clay attapulgite (NCA). Compared with the traditional solvothermal method for the hybridization, the VIC one has the obvious advantages of both reducing the solvent consumption and inducing the crystals self-repairing to generate perfect crystals of the hybrid MOFs. With an appropriate content of the NCA, the hybrid MOFs are proved to be highly stable even undergoing the hot water vapor (90 °C) for 12 h. The hybrid MOFs also exhibit the improved catalytic activity in catalyzing the styrene oxide ring-opening. The molar conversion of the styrene oxide over the hybrid MOF reaches 93.8% within 20 min, even higher than that of the unadulterated Cu-BTC (68.0%). These results indicate the promising application of the hybrid MOFs as the hydrothermal-stable and highly active heterogeneous catalysts
