Shalu Atri, Sitharaman Uma, Rajamani Nagarajan, Maros Gregor, Tomas Roch, Miroslava Filip Edelmannova, Martin Reli, Kamila Koci, Martin Motola and Olivier Monfort
{"title":"探索用于光催化分解 N2O 的铋基材料","authors":"Shalu Atri, Sitharaman Uma, Rajamani Nagarajan, Maros Gregor, Tomas Roch, Miroslava Filip Edelmannova, Martin Reli, Kamila Koci, Martin Motola and Olivier Monfort","doi":"10.1039/D4YA00240G","DOIUrl":null,"url":null,"abstract":"<p >This work is focused on the investigation of three different Bi-based materials, <em>i.e.</em>, CaBi<small><sub>2</sub></small>O<small><sub>2</sub></small>(CO<small><sub>3</sub></small>)<small><sub>2</sub></small> (CBOC), Ca<small><sub>4</sub></small>Bi<small><sub>6</sub></small>O<small><sub>13</sub></small> (CBO), and Bi<small><sub>2</sub></small>Ce<small><sub>2</sub></small>O<small><sub>7</sub></small> (BCO), as photocatalysts in N<small><sub>2</sub></small>O reduction. This study has emphasized the effectiveness of the bismuth ion, irrespective of its presence in different structures with self-regulating electronic and morphological properties, when employed as a photocatalyst. Monophasic CBOC, CBO, and BCO samples have been synthesized by wet-chemical methods, and they exhibit distinct morphological features such as plate-like, dumbbell-shaped, and irregularly shaped crystallites. From the UV-visible diffuse reflectance spectroscopy (DRS) data, CBO exhibits a lower optical band gap of 2.52 eV compared to CBOC (3.95 eV), which CBO is synthesized from. BCO shows the lowest optical band gap of 2.16 eV. CBO exhibits the highest photocurrent generation and the lowest value in work function measurements, following the trend as CBO > CBOC > BCO. The efficiency of the Bi-based materials in photocatalytic decomposition of N<small><sub>2</sub></small>O also follows a similar trend as observed in the photocurrent measurements, wherein the CBO sample exhibits a maximum of 10.4% decomposition of N<small><sub>2</sub></small>O under UV-A in 24 h. Oxygen vacancies in CBO and BCO have been reasoned to play a crucial role in the photocatalytic decomposition of N<small><sub>2</sub></small>O.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":null,"pages":null},"PeriodicalIF":3.2000,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00240g?page=search","citationCount":"0","resultStr":"{\"title\":\"Exploration of bismuth-based materials for photocatalytic decomposition of N2O†\",\"authors\":\"Shalu Atri, Sitharaman Uma, Rajamani Nagarajan, Maros Gregor, Tomas Roch, Miroslava Filip Edelmannova, Martin Reli, Kamila Koci, Martin Motola and Olivier Monfort\",\"doi\":\"10.1039/D4YA00240G\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >This work is focused on the investigation of three different Bi-based materials, <em>i.e.</em>, CaBi<small><sub>2</sub></small>O<small><sub>2</sub></small>(CO<small><sub>3</sub></small>)<small><sub>2</sub></small> (CBOC), Ca<small><sub>4</sub></small>Bi<small><sub>6</sub></small>O<small><sub>13</sub></small> (CBO), and Bi<small><sub>2</sub></small>Ce<small><sub>2</sub></small>O<small><sub>7</sub></small> (BCO), as photocatalysts in N<small><sub>2</sub></small>O reduction. This study has emphasized the effectiveness of the bismuth ion, irrespective of its presence in different structures with self-regulating electronic and morphological properties, when employed as a photocatalyst. Monophasic CBOC, CBO, and BCO samples have been synthesized by wet-chemical methods, and they exhibit distinct morphological features such as plate-like, dumbbell-shaped, and irregularly shaped crystallites. From the UV-visible diffuse reflectance spectroscopy (DRS) data, CBO exhibits a lower optical band gap of 2.52 eV compared to CBOC (3.95 eV), which CBO is synthesized from. BCO shows the lowest optical band gap of 2.16 eV. CBO exhibits the highest photocurrent generation and the lowest value in work function measurements, following the trend as CBO > CBOC > BCO. The efficiency of the Bi-based materials in photocatalytic decomposition of N<small><sub>2</sub></small>O also follows a similar trend as observed in the photocurrent measurements, wherein the CBO sample exhibits a maximum of 10.4% decomposition of N<small><sub>2</sub></small>O under UV-A in 24 h. Oxygen vacancies in CBO and BCO have been reasoned to play a crucial role in the photocatalytic decomposition of N<small><sub>2</sub></small>O.</p>\",\"PeriodicalId\":72913,\"journal\":{\"name\":\"Energy advances\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2024-06-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00240g?page=search\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Energy advances\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2024/ya/d4ya00240g\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy advances","FirstCategoryId":"1085","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/ya/d4ya00240g","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Exploration of bismuth-based materials for photocatalytic decomposition of N2O†
This work is focused on the investigation of three different Bi-based materials, i.e., CaBi2O2(CO3)2 (CBOC), Ca4Bi6O13 (CBO), and Bi2Ce2O7 (BCO), as photocatalysts in N2O reduction. This study has emphasized the effectiveness of the bismuth ion, irrespective of its presence in different structures with self-regulating electronic and morphological properties, when employed as a photocatalyst. Monophasic CBOC, CBO, and BCO samples have been synthesized by wet-chemical methods, and they exhibit distinct morphological features such as plate-like, dumbbell-shaped, and irregularly shaped crystallites. From the UV-visible diffuse reflectance spectroscopy (DRS) data, CBO exhibits a lower optical band gap of 2.52 eV compared to CBOC (3.95 eV), which CBO is synthesized from. BCO shows the lowest optical band gap of 2.16 eV. CBO exhibits the highest photocurrent generation and the lowest value in work function measurements, following the trend as CBO > CBOC > BCO. The efficiency of the Bi-based materials in photocatalytic decomposition of N2O also follows a similar trend as observed in the photocurrent measurements, wherein the CBO sample exhibits a maximum of 10.4% decomposition of N2O under UV-A in 24 h. Oxygen vacancies in CBO and BCO have been reasoned to play a crucial role in the photocatalytic decomposition of N2O.