Investigasi Struktur dan Energi Band Gap Partikel Nano Tio2 Hasil Sintesis Menggunakan Metode Sol-Gel

Listanti, Anita; Taufiq, Ahmad; Hidayat, Arif; Sunaryono, Sunaryono

doi:10.17977/um024v3i12018p008

Cited by 13 publications

(10 citation statements)

References 19 publications

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“…Choosing a moderately high calcination temperature needs to be considered to prevent agglomeration, which results in an increase in particle size and a decrease in the active surface area. Listanti et al [26] reported that agglomeration occurred during the calcination of Ti02 at 6oo°C. The Ti02 / metal-chlorophyll (Ti 02/M-Chl ) materials were characterized using a Diffuse Reflectance UV-Vis (DR / UV-Vis) spectrophotometer analyze the UV-Vis reflectance characteristics and calculate the bandgap energy of the material.…”

Section: Synthesis Of Ti02 / Metal-chlorophyll Materialsmentioning

confidence: 99%

Bandgap Energy of TiO₂/M-Chlorophyll Material (M=Cu²⁺, Fe³⁺)

2021

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The bandgap energy (Egap) of TiO2 material modified with metal-chlorophyll complex compounds (M = Cu2+, Fe3+) was observed. Chlorophyll (Chl) was isolated from cassava leaves, and its UV-Vis spectra showed absorption peaks in the Soret band region (410 nm) and in the Q band region (665 nm), which is the typical peak of chlorophyll. Copper(II)-chlorophyll complex was prepared from the reaction between chlorophyll and CuSO4.5H2O, while the iron(III)-chlorophyll was synthesized from chlorophyll and FeCl3.6H2O in methanol solvent under reflux at 65°C. The presence of copperand iron metals in the chlorophyll metal complexes was identified using Atomic Absorption Spectroscopy in methanol solution. The absorption of copper measured in Cu2+-Chl was 0.0488 (0.4805 mg/L), while the iron atom in Fe3+-Chl was 0.0050 (0.0195 mg/L). The UV-vis spectra demonstrate the hypsochromic shift of the Soret band to 405 nm (Cu2+-Chl) and 402 nm (Fe3+-Chl). The Infrared spectra of chlorophyll after being complexed with copper(II) shows the increase of vibrational absorption wavenumber of the C=N group from 1225.06 cm-1 to 1241.94 cm-1 indicates the coordination of the metal ion on the N atom in the pyrrole ring. The shift in the absorption band on the Fe3+-Chl spectrum was seen for the C=O ester group from 1720.49 cm-1 to 1721.10 cm-1 indicating the metal ion bonding in the C=O group of esters. The DR-UVis analysis of TiO2/metal-chlorophyll shows a bathochromic shift towards the visible light region. By using the Tauc plot method, it was observed that the Egap of TiO2 reduces from 3.08 eV to 2.89 eV and 2.93 eV in the compound of TiO2/Cu2+-Chl and TiO2/Fe3+-Chl, respectively.

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Section: Synthesis Of Ti02 / Metal-chlorophyll Materialsmentioning

confidence: 99%

Bandgap Energy of TiO₂/M-Chlorophyll Material (M=Cu²⁺, Fe³⁺)

2021

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“…Gambar 5 memperlihatkan puncak serapan dari TiO2 murni dan Fe-TiO2 pada bilangan gelombang 3610 cm -1 -3786 cm -1 , merupakan vibrasi ulur gugus hidroksil [14]. Spektrum TiO2 diamati puncak serapan pada bilangan gelombang 602 cm -1 dan 786 cm -1 merupakan vibrasi Ti-O [15,16]. Substitusi dopan Fe 3+ pada struktur TiO 2 menyebabkan muncul puncak serapan baru dari vibrasi Fe-O [17,18] yang terjadi pada bilangan gelombang 1054 cm -1 -1065 cm -1 [19,20].…”

Section: B Spektrofotometer Ft-irunclassified

Sintesis TiO2 terdoping Fe3+ untuk Degradasi Rhodamin B Secara Fotokatalisis dengan Bantuan Sinar Tampak

Pratiwi

Harlia²,

Aritonang³

2020

Positron

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Fotokatalis TiO2 terdoping Fe3+ telah disintesis menggunakan titanium tetraisopropoksida (TTIP) sebagai prekursor serta dopan Fe3+ dari Fe(NO3)3 dengan metode sol-gel. Fotokatalis TiO2 didoping menggunakan Fe3+ bertujuan untuk memperlebar serapan dari sinar Ultra Violet (UV) hingga sinar tampak pada berbagai variasi persentase Fe3+ 0,05%; 0,125%; 0,25% (b/v). karakterisasi fotokatalis dilakukan dengan metode spektrofotometri UV-Vis/DRS, FT-IR, XRD dan diuji aktivitasnya terhadap degradasi rhodamin B. Hasil pengukuran UV-Vis/DRS dari setiap variasi memberikan energi celah pita (Eg) masing-masing sebesar 1,33 eV, 2,11 eV, 2,53 eV. Spektra Infra merah (FT-IR) menunjukkan serapan Fe-O yang merupakan interaksi antara TiO2 dengan dopan Fe3+ dalam struktur TiO2. Hasil pengukuran x-ray difraction (XRD) Fe-TiO2 memberikan difragtogram pada 2θ 25,4773°, 37,9223°, 48,0159° mengindikasikan bahwa Fe3+ telah tersubsitusi kedalam struktur TiO2. Dopan Fe3+ yang telah tersubsitusi juga dapat dibuktikan dari penurunan ukuran rata-rata kristalit dan jarak antar kisi. Hasil Uji Aktivitas konsentrasi dopan Fe3+ 0,125% memiliki aktivitas tertinggi yaitu sebesar 25,605%. Hasil penelitian tersebut menunjukkan bahwa Fe-TiO2 memiliki potensi dalam mendegradasi rhodamin B menggunakan sinar tampak.

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“…The maximum absorbance values for TiO2:(F+In) films at concentrations of 0, 5, 10, 15, and 20% were 6.08; 6.25; 6.37; 6.46; and 6.57. This is supported by the characteristics of TiO2 compounds in the anatase phase which absorb wavelengths with small values (close to the ultraviolet region) [23,24]. The addition of a mixture of Fluorine and Indium doping causes a shift in absorption towards visible light with a wavelength range from 320-700 nm (Figure 4b).…”

Section: Resultsmentioning

confidence: 69%

Structure and optical properties of Titanium Dioxide thin film with mixed Fluorine and Indium doping for solar cell components

Doyan

Susilawati

Mahardika

et al. 2022

J. Phys.: Conf. Ser.

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Research has been carried out in the form of the synthesis of a thin film of Titanium Dioxide with a mixture of Fluorine and Indium doping. The purpose of this research is to obtain the characteristics of a thin filmphotocatalyst with a crystal structure and optical properties that can be applied to solar cell components. This research was carried out in two stages, namely the synthesis stage and the thin filmcharacterization stage. The TiO2 thin film synthesis stage is through the substrate preparation process, sol-gel solution preparation, thin film deposition, and heating process, while the thin-film characterization stage uses X-Rays Diffraction (XRD) to identify crystal properties and UV-VisSpectrophotometer to determine optical properties of a thin film of TiO2 and TiO2:(F+In). Based on data analysis and discussion, XRD test results showed that the thin film of TiO2:(F+In) has an Anatase phase with a tetragonal shape, and has an average crystal size that is getting smaller from 23.14 to 12.17 nm. Based on the results of research, data analysis, and discussion, it was found that the sample of TiO2 : (F+In) has characteristics that can be used as materials in the development of solar cell components. These characteristics are like 1). havenano-sized particles, 2). have a low transmittance value and high absorbance in absorbing sunlight, and 3). have a low activation energy and energy gap (direct and indirect).

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Investigasi Struktur dan Energi Band Gap Partikel Nano Tio2 Hasil Sintesis Menggunakan Metode Sol-Gel

Cited by 13 publications

References 19 publications

Bandgap Energy of TiO₂/M-Chlorophyll Material (M=Cu²⁺, Fe³⁺)

Bandgap Energy of TiO₂/M-Chlorophyll Material (M=Cu²⁺, Fe³⁺)

Sintesis TiO2 terdoping Fe3+ untuk Degradasi Rhodamin B Secara Fotokatalisis dengan Bantuan Sinar Tampak

Structure and optical properties of Titanium Dioxide thin film with mixed Fluorine and Indium doping for solar cell components

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