MSc. Ikhbayar Batsukh, Assoc. Prof. Tegshjargal Khishigjargal, Uuriintuya Dembereldorj, Assoc. Prof. Munkhtsetseg Sambuu, Assoc. Prof. Erdene-Ochir Ganbold, Assoc. Prof. Erdene Norov
{"title":"可回收金/Fe3O4 微颗粒还原 2,4-二硝基苯酚和阴离子、阳离子偶氮染料催化活性的比较研究","authors":"MSc. Ikhbayar Batsukh, Assoc. Prof. Tegshjargal Khishigjargal, Uuriintuya Dembereldorj, Assoc. Prof. Munkhtsetseg Sambuu, Assoc. Prof. Erdene-Ochir Ganbold, Assoc. Prof. Erdene Norov","doi":"10.1002/open.202300297","DOIUrl":null,"url":null,"abstract":"<p>We synthesized Au/Fe<sub>3</sub>O<sub>4</sub> microparticles. Initially, citrate-capped Fe<sub>3</sub>O<sub>4</sub> micro-sized particles were synthesized by the co-precipitation method with an excess amount of trisodium citrate. Gold ions were reduced on the surface of citrate-capped Fe<sub>3</sub>O<sub>4</sub> and grew as gold sub-microparticles with an average diameter of 210 nm on the surface. The characteristic SPR peak of gold nanoparticles on the surface of Fe<sub>3</sub>O<sub>4</sub> was detected at 584 nm, whereas the absorption in the near-infrared region was increased. SEM images has proved that the synthesized Au/Fe<sub>3</sub>O<sub>4</sub> composite microparticles has an average diameter of 1.7 micrometers. The results of XRD patterns proved the existence of both crystal phases of Fe<sub>3</sub>O<sub>4</sub> and Au particles. To investigate the catalytic activity, the reaction rate constant of reduction of 2,4-dinitrophenol (2,4-DNP) and degradation of Congo red (CR), and methylene blue (MB) with NaBH4 in the presence of Au/Fe<sub>3</sub>O<sub>4</sub> catalyst was monitored by UV-Vis spectroscopy. The initial reaction rate constant calculated from the change in characteristic peak absorptions of 2,4-dinitrophenol was 3.97×10<sup>−3</sup> s<sup>−1</sup>, while the reaction rate constants for the degradation of CR and MB were 9.72×10<sup>−3</sup> s<sup>−1</sup> and 14.25×10<sup>−3</sup> s<sup>−1</sup> respectively. After 5 cycles, Au/Fe<sub>3</sub>O<sub>4</sub> microparticles preserved 99 % of the reaction rate constant, exhibiting considerable recycling efficiency in the reduction of nitro groups.</p>","PeriodicalId":9831,"journal":{"name":"ChemistryOpen","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/open.202300297","citationCount":"0","resultStr":"{\"title\":\"Comparative Study of Catalytic Activity of Recyclable Au/Fe3O4 Microparticles for Reduction Of 2,4-Dinitrophenol and Anionic, Cationic Azo Dyes.\",\"authors\":\"MSc. Ikhbayar Batsukh, Assoc. Prof. Tegshjargal Khishigjargal, Uuriintuya Dembereldorj, Assoc. Prof. Munkhtsetseg Sambuu, Assoc. Prof. Erdene-Ochir Ganbold, Assoc. Prof. Erdene Norov\",\"doi\":\"10.1002/open.202300297\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>We synthesized Au/Fe<sub>3</sub>O<sub>4</sub> microparticles. Initially, citrate-capped Fe<sub>3</sub>O<sub>4</sub> micro-sized particles were synthesized by the co-precipitation method with an excess amount of trisodium citrate. Gold ions were reduced on the surface of citrate-capped Fe<sub>3</sub>O<sub>4</sub> and grew as gold sub-microparticles with an average diameter of 210 nm on the surface. The characteristic SPR peak of gold nanoparticles on the surface of Fe<sub>3</sub>O<sub>4</sub> was detected at 584 nm, whereas the absorption in the near-infrared region was increased. SEM images has proved that the synthesized Au/Fe<sub>3</sub>O<sub>4</sub> composite microparticles has an average diameter of 1.7 micrometers. The results of XRD patterns proved the existence of both crystal phases of Fe<sub>3</sub>O<sub>4</sub> and Au particles. To investigate the catalytic activity, the reaction rate constant of reduction of 2,4-dinitrophenol (2,4-DNP) and degradation of Congo red (CR), and methylene blue (MB) with NaBH4 in the presence of Au/Fe<sub>3</sub>O<sub>4</sub> catalyst was monitored by UV-Vis spectroscopy. The initial reaction rate constant calculated from the change in characteristic peak absorptions of 2,4-dinitrophenol was 3.97×10<sup>−3</sup> s<sup>−1</sup>, while the reaction rate constants for the degradation of CR and MB were 9.72×10<sup>−3</sup> s<sup>−1</sup> and 14.25×10<sup>−3</sup> s<sup>−1</sup> respectively. After 5 cycles, Au/Fe<sub>3</sub>O<sub>4</sub> microparticles preserved 99 % of the reaction rate constant, exhibiting considerable recycling efficiency in the reduction of nitro groups.</p>\",\"PeriodicalId\":9831,\"journal\":{\"name\":\"ChemistryOpen\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2024-04-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1002/open.202300297\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ChemistryOpen\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/open.202300297\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ChemistryOpen","FirstCategoryId":"92","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/open.202300297","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Comparative Study of Catalytic Activity of Recyclable Au/Fe3O4 Microparticles for Reduction Of 2,4-Dinitrophenol and Anionic, Cationic Azo Dyes.
We synthesized Au/Fe3O4 microparticles. Initially, citrate-capped Fe3O4 micro-sized particles were synthesized by the co-precipitation method with an excess amount of trisodium citrate. Gold ions were reduced on the surface of citrate-capped Fe3O4 and grew as gold sub-microparticles with an average diameter of 210 nm on the surface. The characteristic SPR peak of gold nanoparticles on the surface of Fe3O4 was detected at 584 nm, whereas the absorption in the near-infrared region was increased. SEM images has proved that the synthesized Au/Fe3O4 composite microparticles has an average diameter of 1.7 micrometers. The results of XRD patterns proved the existence of both crystal phases of Fe3O4 and Au particles. To investigate the catalytic activity, the reaction rate constant of reduction of 2,4-dinitrophenol (2,4-DNP) and degradation of Congo red (CR), and methylene blue (MB) with NaBH4 in the presence of Au/Fe3O4 catalyst was monitored by UV-Vis spectroscopy. The initial reaction rate constant calculated from the change in characteristic peak absorptions of 2,4-dinitrophenol was 3.97×10−3 s−1, while the reaction rate constants for the degradation of CR and MB were 9.72×10−3 s−1 and 14.25×10−3 s−1 respectively. After 5 cycles, Au/Fe3O4 microparticles preserved 99 % of the reaction rate constant, exhibiting considerable recycling efficiency in the reduction of nitro groups.
期刊介绍:
ChemistryOpen is a multidisciplinary, gold-road open-access, international forum for the publication of outstanding Reviews, Full Papers, and Communications from all areas of chemistry and related fields. It is co-owned by 16 continental European Chemical Societies, who have banded together in the alliance called ChemPubSoc Europe for the purpose of publishing high-quality journals in the field of chemistry and its border disciplines. As some of the governments of the countries represented in ChemPubSoc Europe have strongly recommended that the research conducted with their funding is freely accessible for all readers (Open Access), ChemPubSoc Europe was concerned that no journal for which the ethical standards were monitored by a chemical society was available for such papers. ChemistryOpen fills this gap.