Search

Exploring high-efficiency and earth-abundant bifunctional electrocatalysts for overall water splitting is of great significance to meet the requirement of the hydrogen economy, but still faces many...

Surface ripple, as an important factor of corrugations in two-dimensional (2D) atomic crystals, plays important roles in determining their mechanical and physical properties. Here, we systematicall...

Developing highly active oxygen evolution reaction (OER) electrocatalysts is crucial and highly desirable to improve the efficiency of water electrolysis for H2 fuel generation. In this work, hiera...

Symmetry is highly relevant with various quantities and phenomena in physics. While the translational symmetry breaks at the edges of two-dimensional hexagonal crystalline flakes, it is usually associated with the breaking of central inversion symmetry that is yet to be observed in terms of physical properties. Here, we report an experiment-theory joint study on in-plane compressed single-crystal monolayer WS

Controlling the interlayer coupling in van der Waals (vdW) homo- or heterostructures by twist angle between two adjacent layers is a powerful approach to manipulate their electronic properties. Her...

The outbreak of the coronavirus (COVID-19) pandemic has forced chemistry teaching from traditional classrooms to online courses worldwide. Herein, we will share some experiences of our online teaching of inorganic chemistry. First, we investigated various teaching platforms and adjusted the online teaching approaches for helping students to be more comfortable with online teaching. During the online class, attention was paid specifically to making the teaching process more topic-focused. This also prompted teachers to interact with students and give feedback in a timely manner. With the student-centered strategy and advanced network technology, we encouraged students to consult literature reports to better digest what they have learned in class and expand their knowledge, thus leading to higher teaching quality and promoting the cultivation of their talents. The overall processes are evaluated by examination, and finally, key points after one-semester online teaching are summarized to further improve future teaching quality. This work provides some rational guidelines toward high-quality online teaching for teachers and could readily expand to courses other than inorganic chemistry.

Herein, through a morphology-inherited annealing treatment of a hollow Fe-doped MOF-5 octahedron as the self-sacrificing template, we report the synthesis of concave ZnFe2O4 hollow octahedral nanocages as sensing materials, which exhibited high performance, including unprecedented excellent sensitivity, good selectivity, and cyclic stability at ultralow working temperature (120 °C).

This study has investigated homogeneous degradation of cotton cellulose into furan derivatives, namely 5-hydroxymethylfurfural (HMF), 1-(furan-2-yl)-2-hydroxyethanone (FHE), and furfural (FF), in concentrated zinc chloride solution under biphasic reaction system with Lewis acids (ZnCl2) as catalysts. Compared with cellulose degradation in pure aqueous phase without any organic solvent, using the integrated reaction and extraction process has shown significant enhancement for the production of HMF, FF, and FHE although the effect on the HMF yield is most significant. However, when dimethyl sulfoxide (DMSO) was added either in the reactive phase or in the extractive phase, the FHE production was inhibited but other product yields were increased. By optimizing the operation conditions, the maximum yields of HMF and FF have been achieved as 79.68 and 17.02 g/kg cellulose. These product yields were, respectively, 130.84 and 3.29 times of those obtained from the systems without any extraction solvent.