含钛高炉渣衍生钙钛矿型催化剂可见光下光催化降解气态甲苯的研究  

Ti-Bearing Blast Furnace Slag Derived Perovskite-Type Catalyst for Photocatalytic Degradation of Gaseous Toluene Under Visible Light

作　　者：马颢菲 苑鹏 沈伯雄 Ma Haofei;Yuan Peng;Shen Boxiong(School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China;School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学能源与环境工程学院,天津300401 [2]河北工业大学化工学院,天津300130

出　　处：《燃烧科学与技术》2023年第3期328-336,共9页Journal of Combustion Science and Technology

基　　金：国家自然科学基金区域创新发展联合基金资助项目(U20A20302);河北省创新研究群体资助项目(E2021202006);河北省重大成果转化资助项目(21283701Z);石家庄科技资助项目(216240117A);河北省高校科技资助项目(JZX2023006);河北省自然科学基金青年科学基金资助项目(E2021202169).

摘　　要：针对钒钛磁铁矿冶炼过程中含钛高炉渣的产量较大,亟需对其进行资源化及增值化利用的情况,对其进行了酸洗和碱洗以制备富钙钛矿型光催化剂并用于降解气态甲苯.XRF和XRD分析表明,原始炉渣经酸碱浸提后可实现钙钛矿相富集;UV-Vis DRS、N2吸附-脱附和EIS等证实,酸洗渣较原始渣和碱洗渣带隙更低、比表面积和光催化活性更高,其在可见光下对甲苯的降解效率高达88.94%.原位红外分析表明,该衍生钙钛矿型光催化剂可将甲苯逐步降解为醇、醛等并矿化为H2O和CO_(2).In view of the large yield of Ti-bearing blast furnace slag during the smelting of vanadiumtitanium magnetite,it is urgent to implement its recycling and value-added utilization.Acid and alkali leaching were carried out to enrich perovskite-rich photocatalyst,and then it was used to degrade gaseous toluene.The results of XRD and XRF showed that the perovskite phase can be enriched after the original slag is extracted by acid and alkali leaching.N2 adsorption-desorption,UV-Vis DRS and EIS revealed that acid washing slag has smaller band gap,larger surface area and higher photocatalytic activity than the raw slag and alkali washing slag,and its degradation efficiency of toluene is up to 88.94%under the radiation of visible light.The in situ DRIFTS tests showed that tolu-ene can be degraded by the derived perovskite-type photocatalyst to alcohols and aldehydes gradually and mineral-ized to H2O and CO_(2) finally.

关 键 词：高炉渣 钙钛矿 可见光 降解 甲苯 

分 类 号：X511[环境科学与工程—环境工程]