Ultrathin graphitic carbon nitride nanosheets with huge specific surface areas and exceptional photocatalytic performance of hydrogen evolution are prepared via a facile secondary calcination approach.

In recent years, atmospheric composite pollution has become increasingly serious, and accelerating VOC governance has become the focus of and difficulty in atmospheric governance. Volatile organic compounds (VOCs) come from a wide range of sources, and industrial sources are the main source of anthropogenic VOC emissions in China. Chemicals, oil refining, and solvents are three typical VOC-emitting industries, and their control is an important part of accelerating and optimizing VOC governance. It can be controlled by source control, process control, and pipe end treatment; among these, pipe end treatment is divided into recovery technology and destruction technology. In pipeline end treatment, with the key materials of adsorption, absorption, catalytic oxidation, and catalytic combustion, the research and development of adsorbents, absorbents and catalysts has become a hot spot in recent years. This paper summarizes the chemical materials used in typical VOC pipe end-treatment technology (including adsorbents used in the adsorption method, absorbents used in the adsorption method, and catalysts used in the catalytic oxidation and catalytic combustion methods), summarizes the advantages and disadvantages of various materials and their application range, and looks forward to the direction of future developments.

Ternary chalcogenolate clusters were interlinked with bipyridines into a microporous semiconducting framework with good photocatalytic activity for degradation of rhodamine B.

Calcium vanadate nanorods with sheaf-shaped structures have been synthesized by a facile hydrothermal route using calcium acetate and sodium orthovanadate as the raw materials. The as-prepared calcium vanadate nanorods are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and infrared and photoluminescence (PL) spectroscopy. Calcium vanadate nanorods exhibit single crystalline structure and XRD confirms the crystal structure to be hexagonal Ca₁₀V₆O₂₅ phase. The average diameter and length of the calcium vanadate nanorods are about 50 nm and 3 μm, respectively. A possible formation process of the nanorods has been elucidated.

Chalcogenolate clusters Cd₆Ag₄(EPh)₁₆(DMF)₃(CH₃OH) (E = S, Se) with supertetrahedral structures are isolated. Further interlinking the clusters with organic linker 4,4′-trimethylenedipiperidine in the stepwise assembly approach forms two-dimensional coordination polymers. The clusters and the coordination polymers show tunable band gaps and efficient photocatalytic activities for the degradation of aqueous dye solution. This study demonstrates the great potential of using chalcogenolate clusters and their coordination polymers in photocatalysis applications.