R.S. Pedanekar , S.V. Mohite , N.A. Narewadikar , S.B. Madake , Y. Kim , S.J. Kim , S.M. Jokare , K.Y. Rajpure
{"title":"喷涂 Z 型 TiO2/Bi2WO6 异质结构电极在太阳光下光电催化降解有机污染物","authors":"R.S. Pedanekar , S.V. Mohite , N.A. Narewadikar , S.B. Madake , Y. Kim , S.J. Kim , S.M. Jokare , K.Y. Rajpure","doi":"10.1016/j.materresbull.2024.113127","DOIUrl":null,"url":null,"abstract":"<div><div>This study demonstrates that spray deposited layered TiO<sub>2</sub>/Bi<sub>2</sub>WO<sub>6</sub> heterostructure photoelectrodes exhibit strong interfacial interactions, leading to significant enhancements in photoelectrochemical performance. Time-resolved photoluminescence (TRPL) spectra indicated a prolonged lifetime of photoinduced carriers. The red shift in the absorption edge of TiO<sub>2</sub>/Bi<sub>2</sub>WO<sub>6</sub> improved the visible light harvesting capability of Bi<sub>2</sub>WO<sub>6</sub>. Nyquist plots showed effective charge separation, and the TiO<sub>2</sub> layer at the bottom significantly influenced the flat band potential compared to pristine Bi<sub>2</sub>WO<sub>6</sub>, as evidenced by Mott-Schottky analysis. This configuration improved the separation of photogenerated charge carriers via a Z-scheme charge transfer mechanism. The TiO<sub>2</sub>/Bi<sub>2</sub>WO<sub>6</sub> electrode demonstrated a higher efficiency of 94% for methylene blue degradation within 160 min, compared to pure Bi<sub>2</sub>WO<sub>6</sub>. Quenching experiments confirmed the Z-scheme charge transfer mechanism in the coupled TiO<sub>2</sub>/Bi<sub>2</sub>WO<sub>6</sub> heterojunction during degradation reactions. This study highlights the benefits of semiconductor coupling with different band potentials, promoting large-scale applications of solar-driven TiO<sub>2</sub>/Bi<sub>2</sub>WO<sub>6</sub> photoelectrodes for environmental remediation.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"182 ","pages":"Article 113127"},"PeriodicalIF":5.3000,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Photoelectrocatalytic degradation of organic contaminants by spray coated Z-scheme TiO2/Bi2WO6 heterostructure electrode under solar light\",\"authors\":\"R.S. Pedanekar , S.V. Mohite , N.A. Narewadikar , S.B. Madake , Y. Kim , S.J. Kim , S.M. Jokare , K.Y. Rajpure\",\"doi\":\"10.1016/j.materresbull.2024.113127\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study demonstrates that spray deposited layered TiO<sub>2</sub>/Bi<sub>2</sub>WO<sub>6</sub> heterostructure photoelectrodes exhibit strong interfacial interactions, leading to significant enhancements in photoelectrochemical performance. Time-resolved photoluminescence (TRPL) spectra indicated a prolonged lifetime of photoinduced carriers. The red shift in the absorption edge of TiO<sub>2</sub>/Bi<sub>2</sub>WO<sub>6</sub> improved the visible light harvesting capability of Bi<sub>2</sub>WO<sub>6</sub>. Nyquist plots showed effective charge separation, and the TiO<sub>2</sub> layer at the bottom significantly influenced the flat band potential compared to pristine Bi<sub>2</sub>WO<sub>6</sub>, as evidenced by Mott-Schottky analysis. This configuration improved the separation of photogenerated charge carriers via a Z-scheme charge transfer mechanism. The TiO<sub>2</sub>/Bi<sub>2</sub>WO<sub>6</sub> electrode demonstrated a higher efficiency of 94% for methylene blue degradation within 160 min, compared to pure Bi<sub>2</sub>WO<sub>6</sub>. Quenching experiments confirmed the Z-scheme charge transfer mechanism in the coupled TiO<sub>2</sub>/Bi<sub>2</sub>WO<sub>6</sub> heterojunction during degradation reactions. 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Photoelectrocatalytic degradation of organic contaminants by spray coated Z-scheme TiO2/Bi2WO6 heterostructure electrode under solar light
This study demonstrates that spray deposited layered TiO2/Bi2WO6 heterostructure photoelectrodes exhibit strong interfacial interactions, leading to significant enhancements in photoelectrochemical performance. Time-resolved photoluminescence (TRPL) spectra indicated a prolonged lifetime of photoinduced carriers. The red shift in the absorption edge of TiO2/Bi2WO6 improved the visible light harvesting capability of Bi2WO6. Nyquist plots showed effective charge separation, and the TiO2 layer at the bottom significantly influenced the flat band potential compared to pristine Bi2WO6, as evidenced by Mott-Schottky analysis. This configuration improved the separation of photogenerated charge carriers via a Z-scheme charge transfer mechanism. The TiO2/Bi2WO6 electrode demonstrated a higher efficiency of 94% for methylene blue degradation within 160 min, compared to pure Bi2WO6. Quenching experiments confirmed the Z-scheme charge transfer mechanism in the coupled TiO2/Bi2WO6 heterojunction during degradation reactions. This study highlights the benefits of semiconductor coupling with different band potentials, promoting large-scale applications of solar-driven TiO2/Bi2WO6 photoelectrodes for environmental remediation.
期刊介绍：
Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.
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