SINTESIS Co,N BIDOPED ZrTiO4 SEBAGAI FOTOKATALIS RESPONSIF SINAR TAMPAK POTENSIAL DENGAN VARIASI KONSENTRASI Co DAN SUHU KALSINASI

HIBATUL MUNAWAROH, Akhmad Syoufian, S.Si., Ph.D.

2022 | Skripsi | S1 KIMIA

Sintesis dan karakterisasi Co,N Bidoped ZrTiO4 sebagai model fotokatalis responsif terhadap sinar tampak telah dilakukan. Tujuan penelitian ini adalah mendapatkan material Co,N Bidoped ZrTiO4 melalui metode sol-gel, mempelajari pengaruh variasi presentase CoSO4.7H2O, dan suhu kalsinasi pada material. Sintesis Co,N Bidoped ZrTiO4 dengan metode sol-gel diawali dengan melarutkan titanium isopropoksida (TTIP) dalam etanol absolut yang kemudian direaksikan dengan ZrO2, nitrogen dari urea dengan konsentrasi 10% (b/b)(N/Ti), dan CoSO4.7H2O dengan konsentrasi 0, 1, 3, 5, 7, dan 9% (b/b)(Co/Ti). Variasi konsentrasi CoSO4.7H2O di kalsinasi pada suhu 500 ������°C. 5% Co,N-Bidoped ZrTiO4 di kalsinasi pada variasi suhu 500, 600, 700, 800, dan 900 ������°C. Material Co,N Bidoped ZrO2 disintesis menggunakan metode refluks sebagai proses kontrol. Semua material tersintesis dikarakterisasi dengan X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray (SEM-EDX), fouried transform infrared spectrophotometer (FTIR), dan specular reflectance UV-Visible spectrophotometer (SRUV). Hasil yang diperoleh menunjukkan bahwa sintesis Co,N Bidoped ZrTiO4 melalui metode sol-gel berhasil dilakukan. Karakterisasi XRD menunjukkan bahwa fase kristal fotokatalis Co,N-Bidoped ZrTiO4 didominasi oleh fase tetragonal dan anatas pada suhu 500 ������°C. ZrO2 sebagai supporting material mampu meningkatkan kestabilan termal fotokatalis Co,N-Bidoped ZrTiO4. Analisa SEM-EDX menunjukkan bahwa dopan Co dan N berhasil terdoping ke dalam kerangka ZrTiO4. Spektra IR menunjukkan perubahan intensitas Ti-O. Analisa SRUV menunjukkan bahwa dopan Co dan N mampu menurunkan band gap TiO2. Material dengan penambahan konsentrasi Co 3% dan suhu kalsinasi 500 ������°C memiliki band gap terendah (2.54 eV) dan panjang gelombang tepi absorpsi terpanjang (487 nm).

Synthesis and characterization of Co,N Bidoped ZrTiO4 as a model visible-light responsive photocatalyst has been done. The purpose of this research were to synthesis Co,N bidoped ZrTiO4 material through sol-gel method, to study the effects of percentage variations of CoSO4.7H2O, and calcination temperature on material. Synthesis of Co,N bidoped ZrTiO4 by sol gel method started with dissolving titanium isopropoxide (TTIP) in absolute ethanol, then reacted with ZrO2, nitrogen from urea 10% (w/w)(N/Ti) and CoSO4.7H2O with various concentration of 0, 1, 3, 5, 7, and 9% (w/w)(Co/Ti) . The variation concentration of CoSO4.7H2O was calcined at 500 ������°C. 5% Co,N Bidoped ZrTiO4 calcined with various calcination temperatures at 500, 600, 700, 800, and 900 ������°C. Co,N Bidoped ZrO2 was synthesized by reflux method as control process. All synthesized materials were characterized by X-Ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray (SEM-EDX), fouried transform infrared spectrophotometer (FTIR), and specular reflectance UV-Visible spectrophotometer (SRUV). The result obtained showed that Co,N Bidoped ZrTiO4 was successfully synthesized by sol-gel methode. XRD Characterization showed that crytal phase of photocatalysts were dominated by tetragonal and anatase at 500 ������°C calcination termperature. ZrO2 as supporting material enhanced termal stability of Co,N bidoped ZrTiO4. SEM-EDX analysis showed dopan Co and N successfully doped into ZrTiO4 framework. IR spectra showed intensity change in the absorption of Ti-O bond. SRUV analysis showed that Co and N dopan reduced band gap of TiO2. Material with 3 wt.-% of Co concentration calcined at 500 ������°C has the lowest band gap (2.54 eV) and the longest absorption edge wavelength (487 nm).

Kata Kunci : Co,N Bidoped ZrTiO4, fotokatalis, sol-gel, suhu kalsinasi, variasi konsentrasi