The preparation of activated carbon from residue of a distillation reactor is an efficient and economical strategy for the utilization of hazardous waste resources.However,the prepared activated carbon is generally powdered,which is difficult to meet the requirements of industrial application.In this work,the activated carbon microspheres were prepared based on the rectification residue activated carbon from the powders,using deionized water as the solvent and polyacrylic acid (PAA),sodium alginate (SA) and Ca²⁺ as the additives.The effects of SA,Ca²⁺ and PAA amount on the structure and mechanical strength of the activated carbon microspheres were investigated.X?ray diffraction,Fourier transform infrared spectroscopy and Raman spectroscopy were used to investigate the shaping mechanism of activated carbon microspheres.The activated carbon microspheres were applied in the tetracycline adsorption,and the maximum adsorption capacity of tetracycline was up to 257.8 mg/g.At the same time,after 9 months of water stability test,the activated carbon microspheres still had good adsorption performance and mechanical strength. This shaping strategy adopted green and economical raw materials,which could effectively solve the problems of powder shaping and poor performance of microspheres,and provide the effective solution for the industrial application of high?performance materials.

Plasma modification is an effective way to improve the catalytic activities of materials.Firstly,Co₂(OH)₂CO₃ precursor was synthesized by a hydrothermal method.Then,the precursor was subjected to the oxygen atmosphere low?temperature plasma, and the surface modified Co₃O₄ catalyst (Co₃O₄?P) was obtained,which was further characterized the XRD,SEM,H₂?TPR,O₂?TPD,TEM,XPS,FTIR,Raman spectrum and UV?visible spectrum.The results demonstrate that plasma treatment could reduce the average valence state of Co elements in Co₃O₄ to form more defective sites on the catalyst surface,and lower the Co-O bond energy of Co₃O₄ to improve its low temperature reduction performance.Under the irradiation of full solar spectrum light with intensity of 776 mW/cm²,reaction space velocity of 30 000 mL/（g·h）and toluene concentration of 500 μg/g，the toluene degradation performance of the Co₃O₄?P catalyst could reach 100.0%，which was approximately twice that of the Co₃O₄ catalyst (Co₃O₄?T) prepared by thermal calcination.

Excessive CO₂ emission caused by a large number of human activities is the main cause of global warming,so a method to effectively control the increase in CO₂ concentration is urgently needed.Currently,direct air capture is the only technology capable of achieving negative growth of carbon emissions on a large scale.Solid amine adsorbents,especially silicon?based ones, have been widely studied and used to capture CO₂ from ambient air due to their advantages of high adsorption capacity,corrosion resistance,and low energy consumption.In this paper,silicon?based solid amine adsorbents were classified according to the mode of loading,and the influence of different silicon?based supports on the adsorbent performance was summarized.At the same time,the problems encountered in the industrial application of powdered solid amine adsorbents were put forward,and the current forming methods of solid amine adsorbents were sorted out.Finally,it is pointed out that the development of formed solid amine adsorbents with high adsorption capacity and high stability is the future trend of CO₂ adsorbent industrialization.