6eae93a818303aff77f13b07f77b33cc catalysts-14-00681.pdf 09720282661ebd102606946bbadaa59b388036a9 catalysts-14-00681.pdf 6dfa6c30bb9c0e2f5974fa812dfbd5dbb3fcc3dc91bea5364f73685c3735dac6 catalysts-14-00681.pdf Title: Interstitial N-Doped TiO2 for Photocatalytic Methylene Blue Degradation under Visible Light Irradiation Subject: Photocatalysis is a promising method for methylene blue (MB) degradation due to its effectiveness and environmental compatibility. Among the photocatalysts, titanium dioxide (TiO2) has been widely used for MB degradation due to its exceptional photocatalytic activity. However, the wide bandgap limits the degradation efficiency of TiO2 under visible light. Here, an interstitial nitrogen-doped TiO2 (5%NT/TiO2) used thiourea as the N source was fabricated for visible light-derived MB degradation. The 5%NT/TiO2 exhibited an extended absorption range of visible light. Moreover, photoelectrochemical measurements showed an improvement in the photocurrent response and charge transfer behavior on N/TiO2. Thus, 5%NT/TiO2 had enhanced photocatalytic activity compared with pristine TiO2 and substitutive N-doped TiO2 (5%NAB/TiO2). The accelerated photocatalytic MB degradation process on N/TiO2 could be mainly attributed to the interstitial N doping, which caused the appearance of new energy states and extended optical properties. Through comparing the impact of interstitial and substitutive in TiO2 activity, our work proposes a suitable form of element doping to enhance the optical properties and photocatalytic activity of TiO2 and even other semiconductors, providing guidance for future work. Keywords: TiO2; nitrogen doping; photocatalytic activity; methylene bule degradation; visible light Author: Dezheng Li, Vilanculo Clesio Calebe, Yuqiao Li, Huimin Liu and Yiming Lei Creator: LaTeX with hyperref Producer: pdfTeX-1.40.25 CreationDate: Tue Oct 1 15:04:32 2024 CEST ModDate: Tue Oct 1 15:09:25 2024 CEST Custom Metadata: no Metadata Stream: no Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 14 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 6961481 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- GDDFPQ+VnURWPalladioL Type 1 Custom yes yes yes 10 0 BMNMJN+URWPalladioL-Bold Type 1 Custom yes yes yes 16 0 FNGXIY+URWPalladioL-Roma Type 1 Custom yes yes yes 22 0 NTQUDP+URWPalladioL-Ital Type 1 Custom yes yes yes 27 0 CGDLTM+TimesNewRomanPS-BoldItalicMT Type 1C WinAnsi yes yes no 43 0 XFIZIB+CMSY10 Type 1 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TRTOOR+PalatinoLinotype-Roman TrueType WinAnsi yes yes yes 365 0 YRCNGH+DengXian TrueType WinAnsi yes yes yes 369 0 SRHFGG+SFRM0900 Type 1 Custom yes yes yes 384 0 Jhove (Rel. 1.28.0, 2023-05-18) Date: 2025-01-30 02:45:59 CET RepresentationInformation: catalysts-14-00681.pdf ReportingModule: PDF-hul, Rel. 1.12.4 (2023-03-16) LastModified: 2024-12-04 14:38:54 CET Size: 6961481 Format: PDF Version: 1.7 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 545 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Outlines: Item: Title: Introduction Destination: section.1 Item: Title: Results and Discussion Destination: section.2 Children: Item: Title: Optimization of the Amount of N Doping Destination: subsection.2.1 Item: Title: XRD Patterns of TiO2, 5%NT/TiO2, and 5%NAB/TiO2 Catalysts Destination: subsection.2.2 Item: Title: SEM Images and Corresponding Element Mappings of 5%NT/TiO2 Destination: subsection.2.3 Item: Title: XPS Spectra of TiO2, 5%NT/TiO2, and 5%NAB/TiO2 Catalysts Destination: subsection.2.4 Item: Title: TEM Images of TiO2, 5%NT/TiO2, and 5%NAB/TiO2 Catalysts Destination: subsection.2.5 Item: Title: N2 Adsorption Desorption Isotherm Analysis of TiO2, 5%NT/TiO2, and 5%NAB/TiO2 Catalysts Destination: subsection.2.6 Item: Title: FTIR of TiO2, 5%NT/TiO2, and 5%NAB/TiO2 Catalysts Destination: subsection.2.7 Item: Title: Optical Properties of TiO2, 5%NT/TiO2, and 5%NAB/TiO2 Catalysts Destination: subsection.2.8 Item: Title: Photoelectrochemical Measurements of TiO2, 5%NT/TiO2, and 5%NAB/TiO2 Catalysts Destination: subsection.2.9 Item: Title: Photocatalytic MB Degradation Activity Destination: subsection.2.10 Item: Title: Materials and Methods Destination: section.3 Children: Item: Title: Preparation of the Catalysts Destination: subsection.3.1 Children: Item: Title: Preparation of 5%NT/TiO2 Destination: subsubsection.3.1.1 Item: Title: Preparation TiO2 and 5%NAB/TiO2 Destination: subsubsection.3.1.2 Item: Title: Characterization of the Catalysts Destination: subsection.3.2 Item: Title: Evaluation of the Catalysts Destination: subsection.3.3 Item: Title: Conclusions Destination: section.4 Item: Title: References Destination: section.5 Info: Title: Interstitial N-Doped TiO2 for Photocatalytic Methylene Blue Degradation under Visible Light Irradiation Author: Dezheng Li, Vilanculo Clesio Calebe, Yuqiao Li, Huimin Liu and Yiming Lei Subject: Photocatalysis is a promising method for methylene blue (MB) degradation due to its effectiveness and environmental compatibility. Among the photocatalysts, titanium dioxide (TiO2) has been widely used for MB degradation due to its exceptional photocatalytic activity. However, the wide bandgap limits the degradation efficiency of TiO2 under visible light. Here, an interstitial nitrogen-doped TiO2 (5%NT/TiO2) used thiourea as the N source was fabricated for visible light-derived MB degradation. The 5%NT/TiO2 exhibited an extended absorption range of visible light. Moreover, photoelectrochemical measurements showed an improvement in the photocurrent response and charge transfer behavior on N/TiO2. Thus, 5%NT/TiO2 had enhanced photocatalytic activity compared with pristine TiO2 and substitutive N-doped TiO2 (5%NAB/TiO2). The accelerated photocatalytic MB degradation process on N/TiO2 could be mainly attributed to the interstitial N doping, which caused the appearance of new energy states and extended optical properties. Through comparing the impact of interstitial and substitutive in TiO2 activity, our work proposes a suitable form of element doping to enhance the optical properties and photocatalytic activity of TiO2 and even other semiconductors, providing guidance for future work. 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