Abstract Phase-pure interpenetrated MOF-5 ([Zn4(O)(BDC)3]) was synthesized by pH* control in a reaction medium, and its stability in the presence of epoxides was confirmed by powder X-ray diffraction analysis. Interpenetrated MOF-5/tetra-n-butylammonium bromide (int-MOF-5/n-Bu4NBr) showed a high catalytic activity toward CO2 fixation to epoxide to synthesize cyclic carbonates. The conversions of propylene oxide (PO) and styrene oxide (SO) by int-MOF-5/n-Bu4NBr were almost two...
Abstract Carbonyl iron powder (CIP) coated with a layer of epoxy (EP) shell, denoted as core–shell CIP@EP composites, were designed and prepared via in situ polymerization. The CIP@EP composites containing 4.5–6.8 wt% EP were systematically characterized by X-ray diffraction, Fourier transform infrared spectroscopy, vibrating sample magnetometer, scanning and transmission electron microscopy, and vector network analyzer. The results indicated that CIP@EP composites with 9–254 nm...
Abstract Carbon fiber@MnO2 composite (CF@MnO2) has been successfully synthesized based on the redox mechanism, and the morphological and electrochemical features are also studied. As a promising anode material for structural lithium-ion batteries (SLIBs), CF@MnO2 composite presents a coulombic efficiency of over 99% and good cyclic ability. It performs a high reversible capacity of 648 mAh g−1 after 150 cycles at a current density of 100 mA g−1, approximately 2.5 times as high...
Abstract CuFeO2 is a promising photocathode material with favorable band gap and chemical stability in alkaline electrolytes. However, CuFeO2 is suffered from poor photoinduced electron–hole separation and collection. In this paper, we utilize a heterojunction strategy for inhibiting charge recombination and enhancing its photoelectrochemical performance. CuFeO2/CuO heterojunction photocathodes were prepared by a facile spin coating method, which were used for photoelectrochemical...
Abstract Bacteria have an ability to produce cellulose in pure form without any impurities such as hemicellulose and lignin, unlike plant cellulose. Bacterial cellulose as-produced with 3-D interwoven nanofibrous network is superior to plant cellulose in terms of mechanical properties, porosity, crystallinity, water holding capacity, and sustainability. In its natural form, bacterial cellulose is in the form of a hydrogel, which implies high porosity and holding capacity, however,...
Abstract The mixed halide CH3NH3PbI3−xClx crystalline thin film has been prepared by two-step solution-processed repeated dip coating method at an ambient atmosphere. X-ray diffraction study reveals the presence of tetragonal and cubic phases in deposited film. Raman study confirms the metal halide bond in the inorganic framework and organic CH3 stretching/bending of C–H bond in CH3NH3PbI3−xClx perovskite. Scanning electron microscopy shows that cuboid and polyhedral-like crystal...
Abstract MXenes as anode materials for Li-ion batteries (LIBs) have shown excellent electrochemical performance, and they still have great potential. To explore the effect of chemical composition on their electrochemical performance, herein we report an approach for preparation of (Vx, Ti1−x)2C MXenes (x = 1, 0.7, 0.5, 0.3, 0) via etching their precursor solid solutions of (Vx, Ti1−x)2AlC. The exfoliated (Vx, Ti1−x)2C MXenes with good multilayered morphology exhibit good electrochemical...
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου