林佳, 张玉德, 张乾,等.锌铬水滑石对甲基橙的吸附和光催化再生性能研究[J].河南理工大学学报（自然科学版）,2022,41(5):180-188.

LIN J, ZHANG Y D, ZHANG Q, et al.Study on adsorption and photocatalytic regeneration capability of Zn₃Cr-CO₃ LDH as adsorbent for removal of methyl orange[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(5):180-188.

锌铬水滑石对甲基橙的吸附和光催化再生性能研究

林佳, 张玉德, 张乾, 尚金俐, 邓扶摇, 代鸣洋

河南理工大学 化学化工学院，河南 焦作 454000

摘要:为了解决水滑石作为吸附剂的高效吸附和绿色再生问题，将Zn，Cr两种过渡金属元素引入水滑石的层板结构，采用共沉淀法制备了Zn₃Cr-CO₃LDH，利用其光催化特性降解吸附的有机污染物分子，实现再生和循环使用，并对Zn₃Cr-CO₃LDH的微观结构、吸附性能影响因素以及再生循环性能进行了试验研究。结果表明：Zn₃Cr-CO₃LDH具有层级多孔结构，比表面积高（113.7 m²/g），对甲基橙的最大吸附量为938.08 mg/g；甲基橙通过作用在Zn₃Cr-CO₃LDH表面呈多层吸附，其吸附行为符合Freundlich吸附等温和准二级动力学模型，是一种自发、吸热过程。光催化再生的Zn₃Cr-CO₃LDH在循环使用中仍能保持较高的吸附效率。

关键词:锌铬水滑石;层级多孔;甲基橙;高效吸附;光催化再生;重复利用性

doi:10.16186/j.cnki.1673-9787.2020100038

基金项目:国家自然科学基金资助项目（51974100，51104060，51304074）；河南省高等学校重点科研项目（21A440004）；河南理工大学“太行学者”发展计划项目（672103/002/037）

收稿日期:2020/10/19

修回日期:2021/01/07

出版日期:2022/09/25

Study on adsorption and photocatalytic regeneration capability of Zn₃Cr-CO₃ LDH as adsorbent for removal of methyl orange

LIN Jia, ZHANG Yude, ZHANG Qian, SHANG Jinli, DENG Fuyao, DAI Mingyang

School of Chemistry and Chemical Engineering，Henan Polytechnic University，Jiaozuo 454000，Henan，China

Abstract:In order to solve the problem of effective adsorption and green regeneration of hydrotalcite adsorbent，two kinds of transition metal elements of Zn and Cr were introduced into the laminate structure of hydrotalcite，and Zn₃Cr-CO₃LDH was prepared by co-precipitation method.The photocatalytic properties of Zn₃Cr-CO₃LDH was used to degrade the adsorbed organic pollutant molecules and realized the regeneration and recycling of the hydrotalcite.The microstructure，the influencing factors of adsorption property and regeneration cycle performance of Zn₃Cr-CO₃LDH were studied in detail.The results showed that Zn₃Cr-CO₃LDH had a hierarchical porous structure，a high specific surface area （113.7 m²/g），and the maximum adsorption capacity for methyl orange was 938.08 mg/g.Methyl orange exhibited multilayer adsorption on the Zn₃Cr-CO₃LDH surface through physical and chemical action，its adsorption behavior was consistent with Freundlich adsorption isotherm model and pseudo-second-order kinetic model.It was a spontaneous and endothermic process.The Zn₃Cr-CO₃LDH regenerated by photocatalytic could still maintain high adsorption efficiency during recycling.

Key words:ZnCr-COLDH;hierarchical porous;methyl orange;efficient adsorption;photocatalytic regeneration;recyclability

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