Insight into γ-Irradiation-Induced Structure Evolution of Uranium(IV) Germanates as Crystalline Nuclear Waste Forms

化学 辐照 放射化学 锕系元素 放射性废物 核化学 冶金 核物理学 物理 材料科学
作者
Xu Zhang,Liao Meng,Chengguang Yang,Tao Bo,Jiazhuang Chen,Yan Guo,Jipan Yu,Lin Wang,Kong‐Qiu Hu,Wei‐Qun Shi,Meng Zhang,Lei Mei
出处
期刊:Inorganic Chemistry [American Chemical Society]
卷期号:63 (45): 21719-21733
标识
DOI:10.1021/acs.inorgchem.4c02704
摘要

New kinds of crystalline waste forms with improved structural stability are desirable for actinide immobilization. In this work, using a molten salt method, two uranium(IV) germanate compounds, namely, K2UGe3O9 (1) and K2UGe2O7 (2), were synthesized, whose compositions consisted of trimeric and dimeric units of germanate, as well as tetravalent uranium, as proved by bond valence calculation and X-ray absorption spectra. Radiation stability assessment is further performed by γ-irradiation to assess the potential of as-synthesized uranium germanate compounds as nuclear waste forms. Powder X-ray diffraction and single-crystal diffraction analyses reveal that 1 remains stable within 1 MGy dosage and undergoes a significant structural change with increasing dosage at 2 MGy, leading to a transformation of 1 to 1-ir analogous to 2 in chemical structure. The underlying mechanism was further studied through a combination of different characterization techniques, including Raman, UV–vis, and electron paramagnetic resonance spectroscopies. Density functional theory calculations of 1 and 2 were also conducted to probe the coordination interaction of germanium and uranium with oxygen atoms. This work reports new crystalline uranium germanates by flux growth and, most importantly, provides insights into the irradiation stability of these materials, which will be beneficial to developing waste forms for long-term immobilization of radionuclides.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
1秒前
Akim应助vicky采纳,获得10
1秒前
正无穷发布了新的文献求助10
1秒前
啦啦啦完成签到,获得积分20
1秒前
Colin完成签到,获得积分20
2秒前
脆脆鲨鱼完成签到,获得积分10
2秒前
蓝桉完成签到,获得积分10
2秒前
3秒前
reirei应助风清扬采纳,获得10
5秒前
5秒前
6秒前
6秒前
7秒前
7秒前
Kypsi完成签到,获得积分10
7秒前
7秒前
所所应助小小怪采纳,获得10
8秒前
syr1462完成签到,获得积分10
8秒前
tuanheqi应助包容小刺猬采纳,获得30
8秒前
env完成签到,获得积分10
8秒前
快乐科研发布了新的文献求助10
8秒前
lu发布了新的文献求助10
9秒前
NexusExplorer应助Cici采纳,获得10
10秒前
lin发布了新的文献求助10
10秒前
pluto应助完美的流沙采纳,获得10
10秒前
隐形曼青应助蜡笔小新采纳,获得10
10秒前
10秒前
yl发布了新的文献求助10
11秒前
11秒前
脆脆鲨鱼发布了新的文献求助10
12秒前
12秒前
Dominic发布了新的文献求助10
13秒前
怕黑的纸鹤完成签到,获得积分10
13秒前
13秒前
小铁同学完成签到,获得积分10
14秒前
FashionBoy应助微风采纳,获得10
15秒前
吴圳发布了新的文献求助10
15秒前
16秒前
Li完成签到,获得积分10
16秒前
16秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 360
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3971078
求助须知:如何正确求助?哪些是违规求助? 3515742
关于积分的说明 11179305
捐赠科研通 3250852
什么是DOI,文献DOI怎么找? 1795501
邀请新用户注册赠送积分活动 875868
科研通“疑难数据库(出版商)”最低求助积分说明 805207