纳米<strong>Ag<sup>0</sup>@ACF</strong>材料的制备及其对气态碘的吸附性能

doi:10.11901/1005.3093.2024.336

材料研究学报

2025, Vol. 39

Issue (9): 673-682 DOI: 10.11901/1005.3093.2024.336

研究论文

本期目录 | 过刊浏览

纳米Ag⁰@ACF材料的制备及其对气态碘的吸附性能

詹杰¹, 陈小江², 邹之利³, 苏兴东¹, 谢世宇⁴, 江亮², 王金铃⁵, 王烈林²(

)

^1.中广核研究院有限公司深圳 518028
^2.西南科技大学核环境安全技术创新中心绵阳 621010
^3.阳江核电有限公司阳江 529500
^4.中广核苍南核电有限公司温州 325800
^5.长春工业大学化学工程学院长春 130012

Preparation of Nano Ag⁰@ACF Material and Its Adsorption Performance for Gaseous Iodine

ZHAN Jie¹, CHEN Xiaojiang², ZOU Zhili³, SU Xingdong¹, XIE Shiyu⁴, JIANG Liang², WANG Jinling⁵, WANG Lielin²(

)

^1.China Nuclear Power Technology Research Institute, Shenzhen 518028, China
^2.Innovation Center of Nuclear Environmental Safety Technology, Southwest University of Science and Technology, Mianyang 621010, China
^3.Yangjiang Nuclear Power Co., Ltd., Yangjiang 529500, China
^4.CGN Cangnan Nuclear Power Co., Ltd., Wenzhou 325800, China
^5.School of Chemical Engineering, Changchun University of Technology, Changchun 130012, China

引用本文:

詹杰, 陈小江, 邹之利, 苏兴东, 谢世宇, 江亮, 王金铃, 王烈林. 纳米Ag⁰@ACF材料的制备及其对气态碘的吸附性能[J]. 材料研究学报, 2025, 39(9): 673-682.
Jie ZHAN, Xiaojiang CHEN, Zhili ZOU, Xingdong SU, Shiyu XIE, Liang JIANG, Jinling WANG, Lielin WANG. Preparation of Nano Ag⁰@ACF Material and Its Adsorption Performance for Gaseous Iodine[J]. Chinese Journal of Materials Research, 2025, 39(9): 673-682.

全文: PDF(9743 KB) HTML

摘要:

以活性炭纤维为模板，用水热改性和原位自还原方法制备活性炭纤维负载纳米银Ag⁰@ACF吸附材料，并使用SEM-EDS、XRD、BET和XPS等手段对其表征，研究了这种材料对气态碘的吸附性能。结果表明：纳米银均匀地负载在微孔活性炭纤维材料中成为高比表面积、高反应活性的Ag⁰@ACF复合材料。4%Ag⁰@ACF材料对气态单质碘和甲基碘的吸附容量分别为2.25 g/g和0.48 g/g，分别比活性炭纤维材料提高2.5倍和3.5倍。随着改性剂浓度的提高Ag⁰@ACF对气态碘的吸附容量随之提高；在130℃，改性材料的吸附性能仍较为优异。对这种材料的吸附动力学和机理分析表明，Ag⁰@ACF吸附气态碘时纳米银与碘发生化学反应生成了稳定的AgI，即发生了稳定的化学吸附行为；高反应活性的纳米Ag⁰与丰富多孔结构的活性炭纤维材料结合，实现了对气态碘的高速和高效捕集。

关键词 ：无机非金属材料, 放射性气态碘, Ag⁰@ACF, 水热改性, 原位自还原, 化学吸附

Abstract：

Radioactive gaseous iodine produced during the operation of nuclear reactors needs to be handled safely and efficiently. In this study, a nano-silver loading activated carbon fiber material Ag⁰@ACF was successfully synthesized by hydrothermal modification and in situ reduction methods, and then the Ag⁰@ACF material was characterized by SEM-EDS, XRD, BET, and XPS to evaluate the iodine adsorption performance of Ag⁰@ACF. The results show that the nano-silver particulates were uniformly loaded on the microporous activated carbon fiber material, the acquired Ag⁰@ACF composite exhibited high specific surface area and high reactivity. Its adsorption capacity of gaseous elemental iodine and methyl iodine reached 2.25 g/g and 0.48 g/g, respectively, the adsorption performance was increased by 2.5 times and 3.5 times in contrast to the blank activated carbon fiber material. With the increase of modifier concentration, the adsorption capacity of Ag⁰@ACF for gaseous iodine increases. The material still showed excellent adsorption performance (I₂: 2.30 g/g, CH₃I: 0.51 g/g) even at 130 ^oC. Through the analysis of material adsorption kinetics and mechanisms, the adsorption of Ag⁰@ACF materials for gaseous iodine is a chemical reaction between nano-silver and iodine to form a stable AgI, which is a stable chemical adsorption behavior. The highly reactive silver nanoparticles combined with the rich porous structure of activated carbon fiber materials can achieve rapid and efficient capture of gaseous iodine.

Key words： inorganic non-metallic materials radioactive gaseous iodine Ag⁰@ACF hydrothermal modification in situ self-reduction chemical adsorption

收稿日期: 2024-08-15

ZTFLH:

TQ124.6

基金资助:国家自然科学基金(21101129);国家自然科学基金(41502028);深圳市科技创新委员会技术攻关重点项目(JSGG20200924171000001);四川省自然科学基金(2022NSFSC0252);深圳市国防科工办“揭榜挂帅”行动(JBGS2024-431-004)

通讯作者: 王烈林，教授，wanglielin@swust.edu.cn，研究方向为核废物与环境安全

Corresponding author: WANG Lielin, Tel: 15882867099, E-mail: wanglielin@swust.edu.cn

作者简介: 詹杰，男，1993年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2024.336 或 https://www.cjmr.org/CN/Y2025/V39/I9/673

图1 实验装置示意图

图2 ACF和Ag0@ACF复合材料的SEM照片以及Ag0@ACF的EDS-Mapping能谱

图3 ACF、Ag0@ACF的XRD谱

表1 Ag0@ACF的比表面积和孔容

图4 N2的吸脱附曲线、ACF的孔径分布和5%Ag0@ACF的孔径分布

图5 Ag0@ACF材料对单质碘及甲基碘的吸附容量

图6 吸附时间对单质碘及甲基碘吸附性能的影响

表2 不同吸附材料对气态碘的吸附容量

图7 吸附温度对单质碘及甲基碘吸附性能的影响

图8 气态单质碘和气态甲基碘的吸附准一阶模型拟合曲线和准二阶模型拟合曲线

表3 Ag0@ACF对气态碘的吸附动力学参数

图9 材料吸附单质碘和甲基碘的SEM-EDS图

图10 吸附碘样品的XRD谱和XPS能谱、吸附碘I 3d双峰谱对比、吸附碘Ag 3d双峰谱对比

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