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      저자 : Binpeng Zhang (검색결과 2 건)
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        In situ synthesis of “brick and mortar”-type lignin-derived carbon/TiO2 composite with a remarkable photocatalytic performance

        Binpeng Zhang,Dongjie Yang,Wensheng Lin,Huan Wang,Yong Qian,Xueqing Qiu 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-

        Alkali lignin (AL), an industrial waste from pulping black liquor, is mainly applied as a low-gradecombustible energy source. Design and preparation of high value-added materials with AL is still achallenge. In this work, wefirstly introduced ammonium group into AL and prepared quaternized alkalilignin (QAL) for improving the solubility in acidic aqueous solution. Then a facile sol–gel andcarbonization process was developed to fabricate lignin-derived carbon/TiO2 (LC/TiO2) compositephotocatalyst using QAL as the carbon precursor. The microstructural characteristics and optical propertyof the LC/TiO2 composite were systematically characterized. Composite exhibited a “brick (TiO2nanoparticles) and mortar (LC)”-type construction, and TiO2 nanoparticles were coated with LC. Theintroduction of LC endowed TiO2 with extended photoabsorption region and enhanced separation ofphoto-generated charge carriers. LC/TiO2 obtained at a carbonization temperature of 650 C presentedthe highest photocatalytic activity for the degradation of organic dye, which was about 3.4 times that ofbare TiO2. Moreover, LC/TiO2 also presented good recyclability. This facile strategy not only offers greatopportunities for the high value-added application of industrial lignin, but also promotes the practicalapplication of TiO2 photocatalyst.

      • KCI등재

        Influences of aggregation behavior of lignin on the microstructure and adsorptive properties of lignin-derived porous carbons by potassium compound activation

        Binpeng Zhang,Dongjie Yang,Xueqing Qiu,Yong Qian,Mengzhen Yan,Qiong Li 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.82 No.-

        In this work, lignin-derived porous carbon was prepared using alkali lignin (AL) or lignosulfonic acid (LS)as a precursor to reveal the activation effects of potassium compound (KHCO3, K2CO3 and KOH) ontechnical lignin with different degree of aggregation. Quartz crystal microbalance with dissipation andatomic force microscope testing results showed that KHCO3 had the best activation effect on AL having ahighly aggregated and dense microstructure, thanks to the expansion effect from KHCO3. LS has a highlydispersed and loose microstructure, and KOH had the best activation effect on LS. This is because thestabilizing effect from KOH could avoid excessive destruction of pore structure during carbonization andactivation process. Therefore, the specific surface area of AL-derived porous carbon obtained with KHCO3and LS-derived porous carbon obtained with KOH could reach 2084 and 2770 m2 g 1, while theabsorption capacity could reach 701 and 870 mg g 1 for sulfamethazine respectively. Our result providesa theoretical base for preparing high quality lignin-derived porous carbon adsorbent with different kindsof technical lignin

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