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helga dwi fahyuan

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UJI UV-VIS LAPISAN TiO2/N2 UNTUK MENENTUKAN BAND GAP ENERGY devi indriani; helga dwi fahyuan; ngatijo ngatijo
JOURNAL ONLINE OF PHYSICS Vol. 3 No. 2 (2018): JOP (Journal Online of Physics) Vol 3 No 2
Publisher : Prodi Fisika FST UNJA

[Title: TEST UV-VIS LAYER TiO2/N2 FOR DETERMINING BAND GAP ENERGY] The effect of nitrogen doping variation on energy band gap in TiO2 layer grown by doctor blade technique. The TiO2/N2 layer was prepared with concentrations of 0%, 15%, 25% and 25% calcined at 500°C for 3 hours. Characterization of band gap energy by using the UV-Vis spectrometer at a wavelength range of 200 nm-700 nm. The band gap energy is obtained by using the Swanepoel equation and Touch Plot method. The results showed that doping of nitrogen can decrease the band gap energy of 3.9250 eV, 3.8750 eV, 3.8375 eV and 3.9125 eV, respectively. The smallest energy band gap is obtained at 25% concentration that is 3.8375eV. Keywords: Coating TiO2/N2, transmittance, Band gap energy

PENGARUH DOPING AL TERHADAP BAND GAP ENERGY LAPISAN TIPIS ZNO Listiorini Listiorini; Helga Dwi Fahyuan; Ngatijo Ngatijo
JOURNAL ONLINE OF PHYSICS Vol. 4 No. 1 (2018): JOP (Journal Online of Physics) Vol 4 No 1
Publisher : Prodi Fisika FST UNJA

[Title: The Effect of dopping Al on the Value of Band Gap Energy Thin Film of ZnO] A research has been conducted on the effect of doping Al on the value of band gap energy thin film ZnO with variation of concentration Al 0%, 4%, 6%, 8% and 10%. A thin film ZnO/Al is grown on a glass substrate using a spin coating technique. The resulting thin film was characterized using a UV-Vis measure the ZnO/Al transmittance value in the wavelength range 200-700 nm. Then calculate the value of band gap energy using the Swanepoel and touc Plot and obtained value band gap energy at concentration 0%, 4%, 6%, 8% and 10% successive is 3,94 eV, 3,25 eV, 3,24 eV, 3,22 eV dan 3,84 eV. Of the results obtained, the smallest band gap energy value at ZnO/Al 8% concentration of 3,22 eV. Keyword: Thin Film, Dopping, Band Gap Energy

PENGARUH DOPING Al TERHADAP TiO2 SEBANGAI PENDEGRADASI LIMBAH TEKSTIL METYELENE BLUE Julianti Lestari; Helga Dwi Fahyuan; Ngatijo Ngatijo
JOURNAL ONLINE OF PHYSICS Vol. 3 No. 2 (2018): JOP (Journal Online of Physics) Vol 3 No 2
Publisher : Prodi Fisika FST UNJA

[Title : Effect Of Thin Layer Thickness TiO2/Al In Photocatalisles As A Metyelene Blending Textile Waste Blending] Research on the effect of TiO2/Al thin film thickness has been made with spin coating technique at a rotational speed of 1500 rpm for 20 seconds and 30 seconds. TiO2/Al thin layer was tested by Scanning Electron Microscopy (SEM) to see thickness and morphology. The resulting thickness is 1, 300 μm for a 20 second rotation time and a thin layer with a 30 second rotation time of 4.841 μm thickness. Furthermore, photocatalysts were tested for the MB analysis of MB textile waste and from a 100 ppm factory exposed in the sun for 3 hours. The results of absorbance waste after photocatalyst using UV-Vis obtained the greatest degradation value of 94.17% for MB MB of synthesis and 15.11% in MB from factory waste with TiO2 Al 4% thin film. Keywords:Doping, Degradation Value, Photocatalyst.

RANCANG BANGUN TRAINER KIT HTNSJR2018A SEBAGAI INOVASI ALAT BERBASIS LABORATORIUM Frastica Deswardani; Helga Dwi Fahyuan; Nurhidayah; M. Ficky Afrianto; Nelson; Nazarudin
JOURNAL ONLINE OF PHYSICS Vol. 5 No. 2 (2020): JOP (Journal Online of Physics) Vol 5 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v5i2.9396

Telah dilakukan pengembangan media pendidikan berupa peralatan laboratorium berupa Trainer Kit HTNSJR2018A. Pada trainer kit ini terdapat sistem sensor gas SO2 dengan menggunakan sensor MQ136. Untuk sensor akustik, jenis sensor yang digunakan adalah sensor microphone. Sementara, sensor suhu dan kelembaban akan menggunakan sensor DHT22. Hasil yang diperoleh dari pengujian yang telah dilakukan adalah pada sensor suhu dan kelembaban dimana modul penunjang telah bekerja dengan baik untuk mencatat waktu dan menampilkan data dalam format DD/MM/YYYY dan HH:MM:SS. Sensor suhu dan kelembaban telah bekerja dengan baik ditunjukkan dengan adanya perubahan respon saat sensor dipaparkan pengaruh berupa hembusan nafas, udara dari hairdyer dan aliran panas dari korek api. Sedangkan untuk sensor gas MQ136 juga telah bekerja dengan baik ditunjukkan dengan adanya perubahan respon berupa tegangan dan rasio resistansi dari sensor saat dipaparkan gas SO2 yang dihasilkan dari belerang. Kemudian, untuk sensor akustik/microphone juga telah dapat bekerja dengan baik ditunjukkan dari perubahan tegangan saat diberi nada dengan volume rendah dan volume tinggi

Penentuan Nilai Energy Gap Lapisan Tipis TiO2/C Dengan Menggunakan Metode Touc Plot Agus Agus; Helga Dwi Fahyuan; Damris M
Jurnal Ilmu Fisika dan Pembelajarannya (JIFP) Vol 3 No 2 (2019): Jurnal Ilmu Fisika dan Pembelajarannya (JIFP)
Publisher : Program Studi Pendidikan Fisika, UIN Raden Fatah Palembang

Research has been conducted on the determination of the value of the TiO2/C energy gap using the Touc Plot method. The purpose of this study was to determine the effect of the addition of percent doping C to the energy gap on TiO2. In this study the variation of doping C percent on TiO2 was 0, 0.2, 0.4, and 0.6%. To obtain the energy gap value of TiO2/C, a transmittance test was performed using a UV-Vis spectrophotometer. The data transmission is processed using the swanepoel equation to determine the refractive index and thickness of the TiO2 / C that is used to determine the value of the energy gap using the touc plot method, and obtain each energy gap with each doping variation of 3.2, 2 , 60, 2.77, 3.0 eV. Where with the addition of doping C to TiO2 the value of the gap energy produced decreases. Keywords: TiO2/C, Swanepoel, Energy Gap

Co-Authors Agus Agus Damris Muhammad devi indriani Frastica Deswardani Julianti Lestari Listiorini Listiorini Mardian Peslinof Nelson Ngatijo Ngatijo Nurhidayah Nurhidayah Syamsul Arifin

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