In this experiment,ferrous chloride was used as the iron source,titanium sulfate was used as the titanium source,and ammonia water was used as the precipitant.The sulfur-doped titanium iron spinel (S-doped TiFe2O4,SDTF) magnetic nano-adsorbent with good adsorption performance for Congo red was prepared by chemical co-precipitation method.Scanning electron microscopy (SEM),transmission electron microscopy (TEM),Fourier transform infrared spectroscopy (FT-IR),X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS) and vibrating sample magnetometer (VSM) were used to characterize and analyze the adsorption performance of Congo red dye.The conditions such as the amount of SDTF spinel,the initial concentration of Congo red solution,the shaking time and the initial pH of the solution were investigated.The results indicated that under the optimized conditions,the maximum adsorption capacity of the SDTF nano-adsorbent for Congo red reached 674.46mg/g,which was more consistent with Langmuir adsorption and belonged to single molecule adsorption.In addition,the spinel nanomaterial still maintained certain adsorption performance after five cycles of adsorption of Congo red.Therefore,the results showed that S-doped TiFe2O4 nanomaterials as a new type of excellent adsorbent could be potentially applied to the adsorption and removal of Congo red in dye wastewater.
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基金资助
贵州师范大学“国家级大学生创新创业训练计划”项目(202210663024);贵州省基础研究计划(科学技术基金)项目(黔科合基础-ZK[2021]一般073);贵州省基础研究计划(自然科学)项目(黔科合基础-ZK[2024]一般440);2023年度贵州师范大学教学内容和课程体系改革项目(2023XJJG08)
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