摘要
以镉污染土壤修复后的生物质高粱为原材料,利用高温煅烧和水热反应制备了硫改性生物炭光催化材料,通过扫描电镜、X射线衍射等手段对材料的形貌和晶体结构等进行表征,结果表明生物炭上成功负载了硫化镉晶体.光催化降解特性研究发现,该材料能快速降解水中双酚A(BPA),其光催化降解速率分别是生物质高粱生物炭和硫化镉的15.5倍和2.4倍.单因素实验发现,酸性环境、提高材料投加量均能显著提高材料对BPA的光催化降解速率.循环实验表明,该材料具有较好的光催化稳定性.猝灭实验发现,光催化降解过程中起主要作用的活性物种为空穴(h^(+)),其次是·OH和·O^(-).
Using biomass sorghum after remediation of cadmium-contaminated soil as raw material, sulfur-modified biochar based photocatalyst was prepared by calcination and hydrothermal reaction.The morphology and crystal structure of the photocatalyst were analyzed by scanning electron microscopy and X-ray diffraction.The results showed that cadmium sulfide crystals were successfully loaded on the biochar.The photocatalytic degradation experiment found that the photocatalyst can rapidly degrade bisphenol A(BPA) in water, and its photocatalytic degradation rate is 15.5 times and 2.4 times that of biomass sorghum biochar and cadmium sulfide, respectively.The influencing factor experiment found that the acidic conditions and the increase of the material dosage can significantly improve the photocatalytic degradation rate of BPA.Cycling experiments showed that the material has good photocatalytic stability, and quenching experiments showed that the main active species in the reaction are holes(h^(+)),followed by ·OH and ·O^(-1).
作者
曹家骥
王平
凌定勋
黄超
CAO Jiaji;WANG Ping;LING Dingxun;HUANG Chao(College of Environmental Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,China)
出处
《吉首大学学报（自然科学版）》
CAS
2022年第4期72-80,共9页
Journal of Jishou University(Natural Sciences Edition)
基金
湖南省教育厅创新开放基金项目(18K057)
长沙市科技局项目(KQ1801078)。
