Zeynep Kahraman, Ahmet Güngör, Merve Buldu-Aktürk, Metin Tan, Emre Alp, Emre Erdem and Aziz Genç
{"title":"氧化钨纳米线的相变光学、光催化和电容特性","authors":"Zeynep Kahraman, Ahmet Güngör, Merve Buldu-Aktürk, Metin Tan, Emre Alp, Emre Erdem and Aziz Genç","doi":"10.1039/D5DT00212E","DOIUrl":null,"url":null,"abstract":"<p >Transition metal oxides hold great promise across a wide range of applications due to favorable properties such as high abundance, low toxicity, and excellent stability. Nanoengineering approaches are essential for controlling the structural, optical, and electronic properties of these materials, enabling the achievement of desired characteristics in a cost-effective and environmentally friendly manner. In this study, we synthesize stoichiometric (WO<small><sub>3</sub></small>) and sub-stoichiometric (WO<small><sub>3−<em>x</em></sub></small>) tungsten oxide nanowires by controlling their phases and morphologies through the hydrothermal method. This approach allows us to systematically investigate the effects of different phases and oxygen vacancies on the optical properties, as well as on photocatalytic and supercapacitance applications. We use the photodegradation of RhB as a benchmark for photocatalytic activity under various experimental conditions, revealing that oxygen vacancies significantly influence photocatalytic behavior. For example, WO<small><sub>3−<em>x</em></sub></small> nanowires adsorb/degrade a substantial amount of RhB within short durations under ambient conditions, where WO<small><sub>3</sub></small> nanowires are mostly inactive. The addition of H<small><sub>2</sub></small>O<small><sub>2</sub></small> enhances the photocatalytic performance of WO<small><sub>3</sub></small> nanowires over 30 minutes, with even better results under low pH conditions with H<small><sub>2</sub></small>O<small><sub>2</sub></small>. This study also explores the phase-dependent electrochemical properties of WO<small><sub>3</sub></small> and WO<small><sub>3−<em>x</em></sub></small> nanowires, providing insights into their potential for improved supercapacitor performance by leveraging their complementary properties in symmetric and asymmetric configurations. WO<small><sub>3−<em>x</em></sub></small>, with a higher density of oxygen vacancies and thinner structure, offers enhanced conductivity and increased active sites for charge storage, resulting in superior specific capacitance and charge retention.</p>","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":" 18","pages":" 7376-7390"},"PeriodicalIF":3.3000,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/dt/d5dt00212e?page=search","citationCount":"0","resultStr":"{\"title\":\"Phase-dependent optical, photocatalytic and capacitive properties of tungsten oxide nanowires\",\"authors\":\"Zeynep Kahraman, Ahmet Güngör, Merve Buldu-Aktürk, Metin Tan, Emre Alp, Emre Erdem and Aziz Genç\",\"doi\":\"10.1039/D5DT00212E\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Transition metal oxides hold great promise across a wide range of applications due to favorable properties such as high abundance, low toxicity, and excellent stability. Nanoengineering approaches are essential for controlling the structural, optical, and electronic properties of these materials, enabling the achievement of desired characteristics in a cost-effective and environmentally friendly manner. In this study, we synthesize stoichiometric (WO<small><sub>3</sub></small>) and sub-stoichiometric (WO<small><sub>3−<em>x</em></sub></small>) tungsten oxide nanowires by controlling their phases and morphologies through the hydrothermal method. This approach allows us to systematically investigate the effects of different phases and oxygen vacancies on the optical properties, as well as on photocatalytic and supercapacitance applications. We use the photodegradation of RhB as a benchmark for photocatalytic activity under various experimental conditions, revealing that oxygen vacancies significantly influence photocatalytic behavior. For example, WO<small><sub>3−<em>x</em></sub></small> nanowires adsorb/degrade a substantial amount of RhB within short durations under ambient conditions, where WO<small><sub>3</sub></small> nanowires are mostly inactive. The addition of H<small><sub>2</sub></small>O<small><sub>2</sub></small> enhances the photocatalytic performance of WO<small><sub>3</sub></small> nanowires over 30 minutes, with even better results under low pH conditions with H<small><sub>2</sub></small>O<small><sub>2</sub></small>. This study also explores the phase-dependent electrochemical properties of WO<small><sub>3</sub></small> and WO<small><sub>3−<em>x</em></sub></small> nanowires, providing insights into their potential for improved supercapacitor performance by leveraging their complementary properties in symmetric and asymmetric configurations. WO<small><sub>3−<em>x</em></sub></small>, with a higher density of oxygen vacancies and thinner structure, offers enhanced conductivity and increased active sites for charge storage, resulting in superior specific capacitance and charge retention.</p>\",\"PeriodicalId\":71,\"journal\":{\"name\":\"Dalton Transactions\",\"volume\":\" 18\",\"pages\":\" 7376-7390\"},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2025-04-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://pubs.rsc.org/en/content/articlepdf/2025/dt/d5dt00212e?page=search\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Dalton Transactions\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2025/dt/d5dt00212e\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dalton Transactions","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/dt/d5dt00212e","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
Phase-dependent optical, photocatalytic and capacitive properties of tungsten oxide nanowires
Transition metal oxides hold great promise across a wide range of applications due to favorable properties such as high abundance, low toxicity, and excellent stability. Nanoengineering approaches are essential for controlling the structural, optical, and electronic properties of these materials, enabling the achievement of desired characteristics in a cost-effective and environmentally friendly manner. In this study, we synthesize stoichiometric (WO3) and sub-stoichiometric (WO3−x) tungsten oxide nanowires by controlling their phases and morphologies through the hydrothermal method. This approach allows us to systematically investigate the effects of different phases and oxygen vacancies on the optical properties, as well as on photocatalytic and supercapacitance applications. We use the photodegradation of RhB as a benchmark for photocatalytic activity under various experimental conditions, revealing that oxygen vacancies significantly influence photocatalytic behavior. For example, WO3−x nanowires adsorb/degrade a substantial amount of RhB within short durations under ambient conditions, where WO3 nanowires are mostly inactive. The addition of H2O2 enhances the photocatalytic performance of WO3 nanowires over 30 minutes, with even better results under low pH conditions with H2O2. This study also explores the phase-dependent electrochemical properties of WO3 and WO3−x nanowires, providing insights into their potential for improved supercapacitor performance by leveraging their complementary properties in symmetric and asymmetric configurations. WO3−x, with a higher density of oxygen vacancies and thinner structure, offers enhanced conductivity and increased active sites for charge storage, resulting in superior specific capacitance and charge retention.
期刊介绍:
Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.