Nonequilibrium Process for Doping Under Continuous-Flow Hydrothermal Synthesis of Cerium Oxide-Based Nanoparticles

IF 6.2

Precision Chemistry Pub Date : 2025-04-17 DOI:10.1021/prechem.5c00004

Akira Yoko*, Chunli Han, Ayame Sakonaka, Gimyeong Seong, Takaaki Tomai, Satoshi Ohara and Tadafumi Adschiri*,

{"title":"Nonequilibrium Process for Doping Under Continuous-Flow Hydrothermal Synthesis of Cerium Oxide-Based Nanoparticles","authors":"Akira Yoko*, Chunli Han, Ayame Sakonaka, Gimyeong Seong, Takaaki Tomai, Satoshi Ohara and Tadafumi Adschiri*, ","doi":"10.1021/prechem.5c00004","DOIUrl":null,"url":null,"abstract":"The nonequilibrium composition and its formation process are critical aspects of nanoparticle production technology. Understanding the dynamics of nanoparticle formation under nonequilibrium conditions is essential. In this study, Cr-doped CeO2 nanoparticles are synthesized via continuous-flow hydrothermal synthesis at various temperatures (300, 350, 400 °C) with reaction times precisely controlled on the order of seconds. At the initial stage of particle formation, Cr-rich CeO2 particles form due to a low surface energy. Over time, the Cr content decreases as the particles relax toward the equilibrium structure. This process yields an unusual nonequilibrium composition through rapid heating and short residence times. Similar nonequilibrium compositions are also observed for other dopants, such as Fe and Eu. Continuous-flow hydrothermal synthesis thus presents an efficient method for fabricating nanomaterials with unique compositions that are unattainable using conventional batch methods.","PeriodicalId":29793,"journal":{"name":"Precision Chemistry","volume":"3 7","pages":"372–379"},"PeriodicalIF":6.2000,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12308591/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Precision Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://pubs.acs.org/doi/10.1021/prechem.5c00004","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

The nonequilibrium composition and its formation process are critical aspects of nanoparticle production technology. Understanding the dynamics of nanoparticle formation under nonequilibrium conditions is essential. In this study, Cr-doped CeO₂ nanoparticles are synthesized via continuous-flow hydrothermal synthesis at various temperatures (300, 350, 400 °C) with reaction times precisely controlled on the order of seconds. At the initial stage of particle formation, Cr-rich CeO₂ particles form due to a low surface energy. Over time, the Cr content decreases as the particles relax toward the equilibrium structure. This process yields an unusual nonequilibrium composition through rapid heating and short residence times. Similar nonequilibrium compositions are also observed for other dopants, such as Fe and Eu. Continuous-flow hydrothermal synthesis thus presents an efficient method for fabricating nanomaterials with unique compositions that are unattainable using conventional batch methods.

Abstract Image

查看原文本刊更多论文

连续流水热合成氧化铈基纳米颗粒掺杂的非平衡过程。

非平衡组成及其形成过程是纳米颗粒生产技术的关键环节。了解非平衡条件下纳米颗粒形成的动力学是必不可少的。在本研究中，通过连续流水热合成法在不同温度（300、350、400℃）下合成了cr掺杂的CeO2纳米颗粒，反应时间精确控制在秒级。在颗粒形成初期，由于表面能较低，形成了富cr的CeO2颗粒。随着时间的推移，随着颗粒向平衡结构放松，Cr含量降低。该过程通过快速加热和短停留时间产生不寻常的非平衡成分。类似的非平衡成分也可用于其他掺杂剂，如Fe和Eu。因此，连续流水热合成为制造具有独特成分的纳米材料提供了一种有效的方法，这是使用常规批处理方法无法实现的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Precision Chemistry 精密化学技术-

CiteScore

0.80

自引率

0.00%

发文量

期刊介绍： Chemical research focused on precision enables more controllable predictable and accurate outcomes which in turn drive innovation in measurement science sustainable materials information materials personalized medicines energy environmental science and countless other fields requiring chemical insights.Precision Chemistry provides a unique and highly focused publishing venue for fundamental applied and interdisciplinary research aiming to achieve precision calculation design synthesis manipulation measurement and manufacturing. It is committed to bringing together researchers from across the chemical sciences and the related scientific areas to showcase original research and critical reviews of exceptional quality significance and interest to the broad chemistry and scientific community.