# Fileset

[1-s2.0-S0921883124001365-mmc1.docx](https://mdr.nims.go.jp/filesets/9441f923-1f02-48d0-b81e-71bb89ec3b35/download)

## Creator

Preyaphat Wongchaiya, [Thi Kim Ngan Nguyen](https://orcid.org/0000-0001-8935-1306), Pornapa Sujaridworakun, Siriporn Larpkiattaworn, [Tohru S. Suzuki](https://orcid.org/0000-0001-9458-6863), [Tetsuo Uchikoshi](https://orcid.org/0000-0003-3847-4781)

## Rights

[Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International](https://creativecommons.org/licenses/by-nc-nd/4.0/)

## Other metadata

[Fabrication of g-C3N4 films with enhanced mechanical and charge transfer properties by electrophoretic deposition and subsequent citric acid modification](https://mdr.nims.go.jp/datasets/dd5b6cd9-612e-4117-9cb5-1cf4e21fe5e7)

## Fulltext

SupplementalFabrication of g-C3N4 films with enhanced mechanical and charge transfer properties by electrophoretic deposition and subsequent citric acid modificationPreyaphat Wongchaiya a,b, Thi Kim Ngan Nguyen c,*, Pornapa Sujaridworakun a,d,e,*, Siriporn Larpkiattaworn f, Tohru S. Suzuki b, Tetsuo Uchikoshi b,*a Department of Materials Science, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok 10330, Thailandb Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japanc International Center for Young Scientists, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japand Photocatalysts for Clean Environment and Energy Research Unit, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok 10330, Thailande Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, 254 Soi Chula 12, Phayathai Road, Wang Mai, Pathumwan, Bangkok 10330, Thailandf Expert Centre of Innovative Materials, Thailand Institute of Scientific and Technological Research, 35 Mu 3 Technopolis, Tambon Khlong Ha, Amphoe Khlong Luang, Pathum Thani 12120, Thailand* Corresponding Authors: Email address: uchikoshi.tetsuo@nims.go.jp (T. Uchikoshi)Email address: NGUYEN.Thikimngan@nims.go.jp (T.K.N. Nguyen)Email address: pornapa.s@chula.ac.th (P. Sujaridworakun) b)CA-200°C                   CA-250°C                         CA-300°C                         CA-350°Fig. S1. a) X-ray diffraction (XRD) patterns of the Citric acid (CA) obtained at different calcination temperatures b) Photo of citric acid (CA) heated at different temperature.Fig. S2. FTIR of pure Citric acid after heated at 300 °C.Fig. S3. XPS spectra of C1s of g-C3N4 and g-C3N4-CA-300 °CFig. S4. UV-vis spectra of a) g-C3N4-CA on ITO glass obtained at various citric acid (CA) concentrations after heating at 300 °C                             g-C3N4           g-C3N4-CA        g-C3N4-CA       g-C3N4-CA     g-C3N4-CA     g-C3N4-CA                                                          200 °C              250 °C              300 °C            350 °CFig. S5. Photographs of the EPD films were taken to investigate their physical properties through manual removal using fingers, obtained at different calcination temperatures, with a constant CA concentration of 75 g/la)    g-C3N4              g-C3N4-CA            g-C3N4-CA              g-C3N4-CA        g-C3N4-CA                                   10 g/l                     50 g/l                  75   g/l                     100 g/l    b)    g-C3N4              g-C3N4-CA            g-C3N4-CA              g-C3N4-CA          g-C3N4-CA                                   10 g/l                     50 g/l                  75   g/l                     100 g/l    Fig. S6. Photographs of the EPD films with vary CA concentrations and heated at 300 °C, 2h a) before and b) after electrochemical measurementb)a)Fig. S7. a) Photocurrent response b) linear sweep voltammetry (LSV) plots of the films at different citric acid concentration after heat-treated at 300°C Sample Name Charge transfer (Rs) Rct g-C3N4-CA-200°C 106.2 310,840 g-C3N4-CA-250°C 112.2 393,550 g-C3N4-CA-300°C 77.16 38,171 g-C3N4-CA-350°C 93.32 38,712Fig. S8. Equivalent circuit of EIS consisted of solution resistance (Rs)image4.jpegimage5.jpegimage6.emf40003750 35003250 30002750 25002250 2000 17501500 12501000 750100102104106108110112114C-CC-HC-OO=C=O (CO2) Pure CA-300°CCarbonyl (C=O)17741608124090318442340Carbonyl (C=O)Wavenumber (cm-1)Transmittance (%)17331460oleObject2.binimage7.emf294 292 290 288 286 284 282 2800.00.20.40.60.81.0C–CN–C═N g-C3N4 g-C3N4-CA-300°C288.3 eV285.0 eVIntensity (a.u.)Binding energy (eV) oleObject3.binimage8.emf200 250 300 350 400 450 500 550 600 650 700 750 8000.00.20.40.60.81.01.21.41.6Wavelength (nm) g-C3N4 g-C3N4-CA- 10g/L g-C3N4-CA- 25g/L g-C3N4-CA- 50g/L g-C3N4-CA- 75g/L  g-C3N4-CA- 100g/L  Absorbance (a.u.) oleObject4.binimage9.jpegimage10.jpegimage11.jpegimage12.tiffimage13.tiffimage14.pngimage1.emf5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 2 theta (degree)Intensity (a.u.)CAa) CA-200°C CA-250°C CA-300°CCA-350°C oleObject1.binimage2.jpegimage3.jpeg