Pengaruh doping kobalt (Co) dan penambahan surfaktan sodium dodecyl sulfate (SDS) terhadap sifat fisis, sifat optis, dan aktivitas fotokatalitik nanokristal Zno = Influence of cobalt (Co) doping and surfactant sodium dodecyl sulfate (SDS) on the physical properties optical properties and photocatalytic activity of Zno nanocrystalline
Annisa Noorhidayati;
Rosari Saleh, supervisor; Djoko Triyono, examiner; Lusitra Munisa, examiner
([;Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, Universitas Indonesia], 2014)
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[ABSTRAKZnO:Co/SDS dengan variasi konsentrasi dopant 3 - 13 at% disintesis menggunakan metode kopresipitasi Komposisi sampel dan keberadan dopant Co serta SDS diuji menggunakan spektroskopi Energy Dispersive X Ray EDX Fourier Transform Infrared FTIR dan Electron Spin Resonance ESR Pengaruh dopant dan SDS terhadap struktur kristal ZnO diuji melalui pengukuran X Ray Diffraction XRD Keempat sampel menunjukkan struktur hexagonal wurtzite Fase sekunder Zn OH 2 terdeteksi pada sampel ZnO Co SDS 13 at Pengujian Field Emission Scanning Electron Microscopy FESEM menunjukkan sampel yang disintesis memiliki bentuk menyerupai lembaran Pengaruh dopant dan SDS terhadap sifat optis sampel diuji melalui spektroskopi UV Vis Diffuse Reflectance UV Vis Analisis spektrum UV Vis dengan fungsi Kubelka Munk menunjukkan nilai energy gap sampel menurun dengan peningkatan konsentrasi dopant Aktivitas fotokatalitik sampel diuji dengan mengamati degradasi warna pada larutan uji metil jingga MO dan metilen biru MB Sampel mampu mendegradasi MO sebanyak 85 dan MB sebanyak 89 dengan pemaparan sinar Ultraviolet 200 nm selama 2 jam Spesies utama dalam proses fotodegradasi diuji dengan menambahkan scavenger pada larutan uji Pada sistem ini diketahui pengaruh elektron e hole h gugus radikal hidroksil OH. ABSTRACT;ZnO:Co/SDS with doping concentration varies between 3 ? 13 at% weresynthesized by co-precipitation method. Sample composition also dopant and SDSexistence characterized by Energy Dispersive X-Ray (EDX), Fourier TransformInfrared (FTIR), and Electron Spin Resonance (ESR) spectroscopy. The effect ofdopant and SDS to crystal structure of ZnO were examined by X-Ray Diffraction(XRD). All samples shown hexagonal wurtzite structure. Secondary phase ofZn(OH)2 were detected at ZnO:Co/SDS 13 at%. Field Emission Scanning ElectronMicroscopy (FESEM) measurement shown the as synthesized samples hasnanosheet-like shape. Dopant and SDS effect to optical properties observed by UVVisDiffuse Reflectance (UV-Vis DRS) spectroscopy. UV-Vis reflectancespekctrum were analyzed by Kubelka-Munk relation, it is shown the energy gap ofsamples decreased as the doping concentration increased. Photocatalytic activity ofsamples were tested by observing the degradation of methyl orange (MO) andmethylene blue (MB) as dyes model. Under Ultraviolet irradiation (200 nm)irradiation for 2h, samples were able to degrade MO to 85% and MB to 89%. Mainspecies in photodegradation mechanism tested by adding scavenger. It is shown theeffect of electron (e-)> hole (h+)> hydroxyl radical species (OH-)., ZnO:Co/SDS with doping concentration varies between 3 – 13 at% weresynthesized by co-precipitation method. Sample composition also dopant and SDSexistence characterized by Energy Dispersive X-Ray (EDX), Fourier TransformInfrared (FTIR), and Electron Spin Resonance (ESR) spectroscopy. The effect ofdopant and SDS to crystal structure of ZnO were examined by X-Ray Diffraction(XRD). All samples shown hexagonal wurtzite structure. Secondary phase ofZn(OH)2 were detected at ZnO:Co/SDS 13 at%. Field Emission Scanning ElectronMicroscopy (FESEM) measurement shown the as synthesized samples hasnanosheet-like shape. Dopant and SDS effect to optical properties observed by UVVisDiffuse Reflectance (UV-Vis DRS) spectroscopy. UV-Vis reflectancespekctrum were analyzed by Kubelka-Munk relation, it is shown the energy gap ofsamples decreased as the doping concentration increased. Photocatalytic activity ofsamples were tested by observing the degradation of methyl orange (MO) andmethylene blue (MB) as dyes model. Under Ultraviolet irradiation (200 nm)irradiation for 2h, samples were able to degrade MO to 85% and MB to 89%. Mainspecies in photodegradation mechanism tested by adding scavenger. It is shown theeffect of electron (e-)> hole (h+)> hydroxyl radical species (OH-).] |
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No. Panggil : | S54797 |
Entri utama-Nama orang : | |
Entri tambahan-Nama orang : | |
Entri tambahan-Nama badan : | |
Subjek : | |
Penerbitan : | [Place of publication not identified]: [;Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, Universitas Indonesia], 2014 |
Program Studi : |
Bahasa : | ind |
Sumber Pengatalogan : | LibUI ind rda |
Tipe Konten : | text |
Tipe Media : | unmediated ; computer |
Tipe Carrier : | volume ; online resources |
Deskripsi Fisik : | xii, 50 pages : illustration ; 30 cm + appendix |
Naskah Ringkas : | |
Lembaga Pemilik : | Universitas Indonesia |
Lokasi : | Perpustakaan UI, Lantai 3 |
No. Panggil | No. Barkod | Ketersediaan |
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S54797 | 14-18-335998174 | TERSEDIA |
Ulasan: |
Tidak ada ulasan pada koleksi ini: 20385513 |