{"title":"层状双氢氧化物固定氧化铬纳米颗粒的设计、合成、表征及催化活性研究","authors":"Jagat Singh Kirar","doi":"10.1007/s10562-024-04926-1","DOIUrl":null,"url":null,"abstract":"<div><p>Transition metals are commonly used in the oxidation of cyclohexane, but their harsh reaction conditions and lack of efficiency make further use challenging. In this study, we prepared chromium nanoparticles supported on layered double hydroxide abbreviated as Cr<sub>2</sub>O<sub>3</sub>/LDH. The physiochemical properties of synthesized nanocatalysts were extensively studied using FTIR, XRD, SEM, EDX, TEM, ICP-AES, and XPS technique. The synthesized Cr<sub>2</sub>O<sub>3</sub>/LDH nanocatalyst was used to the liquid phase selective oxidation of cyclohexane under solvent-free condition. The characterization result indicates that the Cr<sub>2</sub>O<sub>3</sub>-NPs were uniformly dispersed on the surface of LDH. The Cr<sub>2</sub>O<sub>3</sub>-NPs alone have relatively low catalytic activity, while LDH has no catalytic activity. However, the Cr<sub>2</sub>O<sub>3</sub>-NPs/LDH hybrid significantly increases both the conversion and selectivity. A maximum conversion of 34.73% cyclohexane and 97.85% selectivity to KA oil obtained over the Cr<sub>2</sub>O<sub>3</sub>/LDH nanocatalyst. Furthermore, the leaching test showed that the Cr<sub>2</sub>O<sub>3</sub>/LDH nanocatalyst was heterogeneous and could be recycled at least six cycles without significant loss in catalytic efficiency.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Design, Synthesis, Characterization and Catalytic Activity of Chromium Oxide Nanoparticles Immobilized on Layered Double Hydroxide as Competent Nanocatalyst\",\"authors\":\"Jagat Singh Kirar\",\"doi\":\"10.1007/s10562-024-04926-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Transition metals are commonly used in the oxidation of cyclohexane, but their harsh reaction conditions and lack of efficiency make further use challenging. In this study, we prepared chromium nanoparticles supported on layered double hydroxide abbreviated as Cr<sub>2</sub>O<sub>3</sub>/LDH. The physiochemical properties of synthesized nanocatalysts were extensively studied using FTIR, XRD, SEM, EDX, TEM, ICP-AES, and XPS technique. The synthesized Cr<sub>2</sub>O<sub>3</sub>/LDH nanocatalyst was used to the liquid phase selective oxidation of cyclohexane under solvent-free condition. The characterization result indicates that the Cr<sub>2</sub>O<sub>3</sub>-NPs were uniformly dispersed on the surface of LDH. The Cr<sub>2</sub>O<sub>3</sub>-NPs alone have relatively low catalytic activity, while LDH has no catalytic activity. However, the Cr<sub>2</sub>O<sub>3</sub>-NPs/LDH hybrid significantly increases both the conversion and selectivity. A maximum conversion of 34.73% cyclohexane and 97.85% selectivity to KA oil obtained over the Cr<sub>2</sub>O<sub>3</sub>/LDH nanocatalyst. Furthermore, the leaching test showed that the Cr<sub>2</sub>O<sub>3</sub>/LDH nanocatalyst was heterogeneous and could be recycled at least six cycles without significant loss in catalytic efficiency.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"155 2\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2025-01-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-024-04926-1\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-024-04926-1","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Design, Synthesis, Characterization and Catalytic Activity of Chromium Oxide Nanoparticles Immobilized on Layered Double Hydroxide as Competent Nanocatalyst
Transition metals are commonly used in the oxidation of cyclohexane, but their harsh reaction conditions and lack of efficiency make further use challenging. In this study, we prepared chromium nanoparticles supported on layered double hydroxide abbreviated as Cr2O3/LDH. The physiochemical properties of synthesized nanocatalysts were extensively studied using FTIR, XRD, SEM, EDX, TEM, ICP-AES, and XPS technique. The synthesized Cr2O3/LDH nanocatalyst was used to the liquid phase selective oxidation of cyclohexane under solvent-free condition. The characterization result indicates that the Cr2O3-NPs were uniformly dispersed on the surface of LDH. The Cr2O3-NPs alone have relatively low catalytic activity, while LDH has no catalytic activity. However, the Cr2O3-NPs/LDH hybrid significantly increases both the conversion and selectivity. A maximum conversion of 34.73% cyclohexane and 97.85% selectivity to KA oil obtained over the Cr2O3/LDH nanocatalyst. Furthermore, the leaching test showed that the Cr2O3/LDH nanocatalyst was heterogeneous and could be recycled at least six cycles without significant loss in catalytic efficiency.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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