氧化改性活性炭纤维吸附材料制备及其性能研究

目的 以不同浓度的双氧水溶液对活性炭纤维进行氧化改性，制备SO₂、NOx腐蚀气氛吸附材料。方法采用红外光谱、X射线衍射仪、X射线光电子能谱仪等表征方式，揭示双氧水改性对活性炭纤维孔隙结构、表面物理化学性质、吸附性能的影响，并将装有吸附材料的防护包装贮存于湿热海洋气候环境中，验证腐蚀气氛控制效果。结果 双氧水改性活性炭纤维后，其表面官能团未发生变化，比表面积先减小、后增大。改性后，活性炭纤维表面活性位点有所增加，对应的吸附性能显著增加，30%双氧水改性活性炭纤维对SO₂、NO₂、NO的饱和吸附量分别为100、153、128 mg/g，与改性前相比，分别提高了67%、180%、137%。应用吸附材料的防护包装内部腐蚀气氛浓度在3个月内几乎为0。结论 双氧水改性活性炭纤维具有良好的腐蚀气氛吸附性能，在长贮微环境中具有良好应用前景。

Preparation and Properties of Oxidized Modified Activated Carbon Fiber Adsorbent

The work aims to prepare SO2 and NOx corrosive atmosphere adsorption materials by oxidation modification with different concentrations of hydrogen peroxide solution. The effects of hydrogen peroxide modification on the pore structure, surface physicochemical properties, and adsorption performance of activated carbon fibers were studied by characterization methods such as infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The protective packaging containing adsorption materials was stored in a humid and hot marine environment to verify the effectiveness of corrosive atmosphere control. There were no significant changes in the surface functional groups of oxidized activated carbon fiber. With the increase of hydrogen peroxide concentration, the specific surface area firstly decreased and then increased. After modification, the active site on the surface of activated carbon fiber increased and the corresponding adsorption performance significantly increased. The saturated adsorption capacity of 30% hydrogen peroxide modified activated carbon fiber for SO2, NO2, and NO was 100 mg/g, 153 mg/g, and 128 mg/g respectively, which was 67%, 180%, and 137% higher than that before modification. The concentration of corrosive atmosphere inside the protective packaging with adsorption materials was almost zero within 3 months. Hydrogen peroxide modified activated carbon fiber has good adsorption performance in corrosive atmosphere, and has good application prospects in long-term storage microenvironment.