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增强的捕获使用一个后合成修改的-银热立石化伊米达框架

Min-Bum Kim¹, Jierui Yu¹, Sun Hae Ra Shin¹

¹Pacific Northwest National Laboratory, Richland, Washington 99352, United States.

ACS applied materials & interfaces

|November 14, 2023

概括

一种新型的银功能化热性意达框架 (ZIF) 显示了增强的放射性捕获. 这种工程吸附剂为环境和人类健康保护提供了卓越的容量和动力学.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
核工程核工程是指核工程.

背景情况:

放射性对环境和健康构成重大风险.
从核工艺中得到的放射性核素的有效管理至关重要.
需要开发有效的吸附剂.

研究的目的:

合成和评估一种用于放射性吸收的新型银--功能化化伊米达框架 (ZIF).
为了比较功能化的ZIF与母ZIF-8和中间材料的吸附性能.
了解增强捕获背后的机制.

主要方法:

使用溶剂辅助的连接物交换进行ZIF-8的合成后修饰.
功能化与2 - 默卡普托米达一起形成ZIF-8 = S.
与酸银的反应产生了Ag功能化的复合物 (ZIF-8 = S-Ag+).
对 (I2) 吸附能力和动力学的评估.

主要成果:

与原始ZIF-8 (450 g I2/mol) 相比,Ag功能化的ZIF (ZIF-8 = S-Ag+) 显示出更高的I2吸附能力 (550 g I2/mol).
功能化材料表现出明显更快的吸附动力学,在5小时内达到50%的负载,在50小时内达到和.
尽管BET表面积较小,但由于强烈的Ag-I相互作用,Ag功能化的ZIF表现更好.

结论:

银对ZIF的功能化是一种提高放射性捕获的有效策略.
该工程吸附剂为核燃料循环应用中管理放射性提供了一个有前途的解决方案.
这项研究推进了对强大的吸收行为吸附剂设计的理解.

关键词:

吸附吸附是一种吸附.(I2) 是一种核废物管理核废物管理合成后的修饰 (PSM)放射性核化物放射性核化物泽奥利特伊米达框架 (ZIF) 的使用

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