摘要
该研究通过共沉淀法成功合成了MoS_(2)/Co-Fe普鲁士蓝类似物(MoS_(2)/PBA_(Co-Fe))复合催化剂,采用X射线衍射仪、傅立叶变换红外光谱仪、扫描电子显微镜、X射线能谱仪、X射线光电子能谱对MoS_(2)/PBA_(Co-Fe)复合催化剂进行了表征,并测试了其在水溶液中活化过硫酸一氢盐(PMS)去除盐酸四环素(TCH)的效果。结果表明,室温条件下(25℃),在100 mg/L MoS_(2)/PBA_(Co-Fe)与1.0 mmol/L PMS体系中,120 min内可降解91.3%的TCH(15 mg/L)。自由基淬灭实验和电子顺磁共振分析表明,单线态氧(^(1)O_(2))、超氧自由基(O_(2)^(·-))、硫酸根自由基(SO_(4)^(·-))和羟基自由基(·OH)等活性物质都参与了TCH的去除。MoS_(2)与Co_(3)[Fe(CN)_(6)]_(2)在MoS_(2)/PBA_(Co-Fe)复合催化剂中的协同作用促进了TCH的去除。MoS_(2)/PBACo-Fe活化PMS的潜在机制,主要涉及Mo^(4+)和硫物种提供的电子促进了Fe^(3+)/Fe^(2+)和Co_(3)+/Co^(2+)的循环。总的来说,MoS_(2)/PBA_(Co-Fe)复合催化剂具有制备简单、催化活性优良等优点,是一种治理水污染的优良候选材料。
MoS_(2)/Co-Fe Prussian blue analogue(MoS_(2)/PBA_(Co-Fe))composite catalyst was successfully synthesized via a co-pre⁃cipitation method,and the MoS_(2)/PBA_(Co-Fe)composite catalyst was characterized by X-ray diffraction,Fourier transform infrared spectroscopy,scanning electron microscopy,energy-dispersive spectrometer,X-ray photoelectron spectroscopy,and tested in activation of peroxymonosulfate(PMS)for tetracycline hydrochloride(TCH)removal in aqueous solutions.The results showed that at room temperature(25℃),the system with 100 mg/L MoS_(2)/PBA_(Co-Fe)and 1.0 mmol/L PMS could degrade 91.3%of TCH(15 mg/L)within 120 minutes.Radical quenching experiments and electron paramagnetic resonance analysis indicated that reactive species such as singlet oxygen(^(1)O_(2)),superoxide radical(O_(2)^(•-)),sulfate radical(SO_(4)^(•-)),and hydroxyl radical(·OH)all played crucial roles in the removal process of TCH.The synergistic effect of MoS_(2)and Co_(3)[Fe(CN)_(6)]_(2) in the MoS_(2)/PBA_(Co-Fe)composite catalyst promoted the removal of TCH.A potential mechanism for the activation of PMS by MoS_(2)/PBA_(Co-Fe)was proposed,mainly involving the promotion of Fe^(3+)/Fe^(2+)and Co_(3+)/Co^(2+)cycling by electrons provided by Mo^(4+)and sulfur species.In summary,MoS_(2)/PBA_(Co-Fe) composite catalyst has the advantages of simple preparation,excellent catalytic activity,making it an excellent candidate material for water pollution remediation.
作者
史丽芯
孙德栋
马红超
郝军
王国文
张新欣
SHI Lixin;SUN Dedong;MA Hongchao;HAO Jun;WANG Guowen;ZHANG Xinxin(School of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China)
出处
《环境科学与技术》
北大核心
2025年第8期28-38,共11页
Environmental Science & Technology
基金
辽宁省教育厅基本科研项目(JYTZD2023027)。
关键词
普鲁士蓝类似物
过硫酸氢盐
活性物质
盐酸四环素废水
高级氧化
Prussian blue analogue
peroxymonosulfate
active substance
tetracycline hydrochloride wastewater
advanced oxidation
