8ffa7ab21c9f8884613f24364ef5c7b5 enhphoact_a2018v8n9.pdf c3bdb548887da85f959249a7200416fdc79b9d5e enhphoact_a2018v8n9.pdf 9a21b378a8dc9ae3d5f9d89463ed9777b800b1c766a3ab0c8383cb97c5accd29 enhphoact_a2018v8n9.pdf Title: Enhancement Photocatalytic Activity of the Heterojunction of Two-Dimensional Hybrid Semiconductors ZnO/V2O5 Subject: In this work, we report the fabrication of the new heterojunction of two 2D hybrid layered semiconductors—ZnO (stearic acid)/V2O5 (hexadecylamine)—and its behavior in the degradation of aqueous methylene blue under visible light irradiation. The optimal photocatalyst efficiency, reached at a ZnO (stearic acid)/V2O5 (hexadecylamine) ratio of 1:0.25, results in being six times higher than that of pristine zinc oxide. Reusability test shows that after three photocatalysis cycles, no significant changes in either the dye degradation efficiency loss, nor the photocatalyst structure, occur. Visible light photocatalytic performance observed indicates there is synergetic effect between both 2D nanocomposites used in the heterojunction. The visible light absorption enhancement promoted by the narrower bandgap V2O5 based components; an increased photo generated charge separation favored by extensive interface area; and abundance of hydrophobic sites for dye adsorption appear as probable causes of the improved photocatalytic efficiency in this hybrid semiconductors heterojunction. Estimated band-edge positions for both conduction and valence band of semiconductors, together with experiments using specific radical scavengers, allow a plausible photodegradation mechanism. Keywords: photocatalysis; heterojunction; two-dimensional semiconductor; ZnO; V2O5; Methylene blue degradation Author: Juan Aliaga, Nasla Cifuentes, Guillermo González, Clivia Sotomayor-Torres and Eglantina Benavente Creator: LaTeX with hyperref package Producer: pdfTeX-1.40.18 CreationDate: Tue Sep 4 12:12:21 2018 CEST ModDate: Tue Sep 4 12:12:21 2018 CEST Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 13 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 1898316 bytes Optimized: no PDF version: 1.5 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- CVKYPI+URWPalladioL-Ital Type 1 Custom yes yes no 69 0 RMTJZJ+URWPalladioL-Bold Type 1 Custom yes yes no 70 0 OXBKYU+TeXGyreAdventor-Bold Type 1 Custom yes yes no 71 0 AIQCCL+VnURWPalladioL-Bold Type 1 Custom yes yes no 72 0 MVQGZY+URWPalladioL-Roma Type 1 Custom yes yes no 73 0 DNNUWA+VnURWPalladioL Type 1 Custom yes yes no 74 0 CGDLTM+TimesNewRomanPS-BoldItalicMT Type 1C WinAnsi yes yes no 79 0 MCBCCI+SourceSansRoman-Regular Type 1C Custom yes yes no 92 0 MCBCCM+SourceSansRoman.613wght Type 1C Custom yes yes no 93 0 MCBCCO+SourceSansRoman-Bold Type 1C Custom yes yes no 94 0 OVZOIH+CMSY10 Type 1 Builtin yes yes no 136 0 ILNHJN+PalatinoLinotype TrueType WinAnsi yes yes no 205 0 ILNHNO+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 206 0 ILNHPP+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 207 0 ILNIIN+TimesNewRoman TrueType WinAnsi yes yes no 208 0 ILNHIN+PalatinoLinotype CID TrueType Identity-H yes yes yes 235 0 ILNHJN+PalatinoLinotype TrueType WinAnsi yes yes no 236 0 ILNHNO+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 237 0 ILNHPP+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 238 0 ILNIIN+TimesNewRoman TrueType WinAnsi yes yes no 239 0 PTKMUE+EURM10 Type 1 Builtin yes yes no 278 0 ILNHIN+PalatinoLinotype CID TrueType Identity-H yes yes yes 283 0 ILNHJN+PalatinoLinotype TrueType WinAnsi yes yes no 284 0 ILNHNO+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 285 0 ILNHPP+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 286 0 ILNIIN+TimesNewRoman TrueType WinAnsi yes yes no 287 0 ILNHIN+PalatinoLinotype CID TrueType Identity-H yes yes yes 320 0 ILNHJN+PalatinoLinotype TrueType WinAnsi yes yes no 321 0 ILNHNO+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 322 0 ILNHPP+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 323 0 ILNIIN+TimesNewRoman TrueType WinAnsi yes yes no 324 0 ILNHIN+PalatinoLinotype CID TrueType Identity-H yes yes yes 366 0 ILNHJN+PalatinoLinotype TrueType WinAnsi yes yes no 367 0 ILNHNO+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 368 0 ILNHPP+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 369 0 ILNIIN+TimesNewRoman TrueType WinAnsi yes yes no 370 0 ILNHIN+PalatinoLinotype CID TrueType Identity-H yes yes yes 415 0 ILNHJN+PalatinoLinotype TrueType WinAnsi yes yes no 416 0 ILNHNO+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 417 0 ILNHPP+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 418 0 ILNIIM+TimesNewRoman CID TrueType Identity-H yes yes yes 419 0 ILNIIN+TimesNewRoman TrueType WinAnsi yes yes no 420 0 java.lang.ClassCastException: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject cannot be cast to edu.harvard.hul.ois.jhove.module.pdf.PdfDictionary at edu.harvard.hul.ois.jhove.module.PdfModule.readDocCatalogDict(PdfModule.java:1284) at edu.harvard.hul.ois.jhove.module.PdfModule.parse(PdfModule.java:525) at edu.harvard.hul.ois.jhove.JhoveBase.processFile(JhoveBase.java:825) at edu.harvard.hul.ois.jhove.JhoveBase.process(JhoveBase.java:614) at edu.harvard.hul.ois.jhove.JhoveBase.dispatch(JhoveBase.java:465) at Jhove.main(Jhove.java:296) Jhove (Rel. 1.6, 2011-01-04) Date: 2019-07-18 05:07:27 CEST RepresentationInformation: enhphoact_a2018v8n9.pdf ReportingModule: BYTESTREAM, Rel. 1.3 (2007-04-10) LastModified: 2019-07-17 14:57:36 CEST Size: 1898316 Format: bytestream Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/octet-stream Checksum: 88c8d89a Type: CRC32 Checksum: 8ffa7ab21c9f8884613f24364ef5c7b5 Type: MD5 Checksum: c3bdb548887da85f959249a7200416fdc79b9d5e Type: SHA-1