Sintesis dan Karakterisasi TiO2 Terdoping Nitrogen (N-Doped TiO2) dengan Metode Sol–Gel

Abstract

The wide bandgap energy of a TiO2 semiconductor equivalent to ultraviolet light (λ <380 nm) limits photocatalytic applications to confined to the ultraviolet region and not to the visible light region (λ = 400 nm-700 nm). In this research, the nitrogen oxide TiO2 synthesis was prepared by sol-gel method. The TiCl4 precursor was used as a source of titanium dioxide and CO(NH2)2 as a nitrogen source and is varied on the amount of N concentration with variations of 20 g, 30 g, 40 g and 50 g. The reflux was carried out at 100°C for 7 hours followed by drying for 3 hours at 100°C, and calcination at 500°C for 7 hours. The N-doped TiO2 characterization was performed using X-ray Diffraction (XRD), Fourier Transform-Infra Red Spectroscopy (FTIR), and UV-Visible diffuse reflectance spectra (UV-Vis DRS). Based on XRD data it was known that N-doped TiO2 crystals have anatase structure with Miller index of 101. The FTIR spectra showed a shift in the uptake of O-Ti-O vibrations at wave number of 400-1050 cm -1 which estimated as a result of the formation of N-Ti-O bonds. The DRS-UV-visible spectrum showed a decrease in band gap energy from TiO2 of 3.2 eV. It can be concluded that the addition of nitrogen concentration resulted in a decrease in band gap energy, at 20 g variation of 3.12 eV, 30 g of 3.09 eV, 40 g of 3.082 eV, and 50 g of 3.08 eV.A b s t r a k Kata Kunci: Fotokatalis, Ndoped TiO2, Semikonduktor Energi celah pita yang lebar dari semikonduktor TiO2 yang setara dengan cahaya ultraviolet (<380 nm) membatasi aplikasi fotokatalitik hanya terbatas pada daerah ultraviolet dan tidak pada daerah cahaya tampak ( = 400 nm-700 nm). Pada penelitian ini dilakukan sintesis TiO2 teremban nitrogen yang dipreparasi melalui metode sol-gel. Prekursor TiCl4 digunakan sebagai sumber titanium dioksida dan CO(NH2)2 sebagai sumber nitrogen dan divariasi pada jumlah konsentrasi N dengan variasi 20 g, 30 g, 40 g dan 50 g. Refluks dilakukan pada suhu 100 , diperkirakan sebagai akibat terbentuknya ikatan N-Ti-O. Spektrum DRS-UV-tampak menunjukkan penurunan energi celah pita dari TiO2 yakni 3,2 eV. Dapat disimpulkan bahwa penambahan konsentrasi nitrogen mengakibatkan penurunan energi celah pita, pada variasi 20g sebesar 3,12 eV, 30 g sebesar 3,09 eV, 40 g sebesar 3,082 eV, dan 50 g sebesar 3,08 eV.

Synthesis and Characterization of TiO2 Semiconductor Doped by AgNO3 and Their Application as Photoanode in Dye-sensitized Solar Cells

“…At a certain point in the linear line that has been drawn there is an intersection point. This intersection point is called α. Α values are obtained using the Kubelka-Munk equation (Karim et al, 2016). The value of the ordinate point α from sample 1 to sample 5 can be seen in Table 2.…”

Synthesis and Characterization of SCDs/TiO2 Composite

“…The PL emission analysis on the three SCDs/TiO2 samples showed that the composite with a CDs ratio of 0.5% has photocatalytic activity under light illumination with the highest efficiency, which corresponds to the Eg value. 5 1,53x10 7 2,6x10 11 1,92x10 7 Anthoni B. Aritonang *) , Ajuk Sapar, Heni Puspita Sari, Puji Ardiningsih, Adhitiyawarman Synthesis and Characterization of SCDs/TiO2 Composite CHEESA, 5(2), pp 92-100, 2022 | 97…”

“…A previous study reported that only 5% of UV light produced by the sun reaches the earth, while 45% is visible light [5]. This indicates that modifications are needed, such as the use of the photocatalytic activity of TiO2 in the visible light absorption region.…”

THE EFFECT OF THE AMOUNT OF IMMERSION OF ZnO DOPING Ag THIN LAYER ON BAND GAP WITH DIP COATING METHOD

“…Where, F(R) is the Kubelka-Munk factor, S is the scattering coefficient, R is the measured reflectance value, A is the proportional constant, and Eg is the band gap [21]. For the measurement of current and voltage on the DSSC measured by a light source carried out in sunny conditions.…”