Sains Malaysiana 46(8)(2017): 1309–1316

http://dx.doi.org/10.17576/jsm-2017-4608-17

 

N-doped Synthesised via Microwave Induced Photocatalytic on RR4 Dye Removal under LED Light Irradiation

(Terdop N Disintesis melalui Ketuhar Gelombang Mikro Teraruh kepada Fotopemangkinan terhadap Penyingkiran Pewarna RR4 di bawah Sinaran Cahaya LED)

 

M.S. AZAMI1,2, W.I. NAWAWI1*, ALI H. JAWAD1, M.A.M. ISHAK1 & K. ISMAIL2

 

1Photocatalysis Laboratory, CBERG, Faculty of Applied Sciences, Universiti Teknologi MARA, 02600 Arau, Perlis Indera Kayangan, Malaysia

 

2Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor Darul Ehsan, Malaysia

 

Diserahkan: 4 Januari 2016/Diterima: 6 Februari 2017

 

ABSTRACT

Nitrogen doped titanium dioxide (N-doped TiO2) was synthesized by microwave using urea as nitrogen sources with commercially available TiO2-P25. The N-doped TiO2 was compared with unmodified TiO2 by carrying out the investigation on its properties using x-ray diffraction (XRD) analysis, Brunauer-Emmett-Teller (BET), Fourier transformed infrared spectroscopy (FTIR) and diffuse reflectance spectroscopy (UV-Vis DRS). The photocatalytic activities of N-doped TiO2 and unmodified TiO2 were studied for photodegradation of reactive red 4 (RR4) under light emitting diode (LED) light irradiation. An active photoresponse under LED light irradiation was observed from N-doped TiO2 with 60 min of time irradiation to complete RR4 color removal while no photocatalytic degradation was observed from unmodified.

 

Keywords: Dyelight emitting diode; microwave; nitrogen doping; photocatalysis; reactive red 4

 

ABSTRAK

Titanium dioksida terdop nitrogen (TiO2 terdop N) telah disintesis oleh ketuhar gelombang mikro menggunakan urea sebagai sumber nitrogen dengan TiO2-P25 yang boleh didapati secara komersial. TiO2 terdop N telah dibandingkan dengan TiO2 tidak diubah suai dengan menjalankan kajian ke atas sifatnya menggunakan analisis pembelauan sinar x (XRD), Brunauer-Emmett-Teller (BET), spektroskopi transformasi Fourier inframerah (FTIR) dan spektroskopi pantulan meresap (UV-Vis DRS). Aktiviti fotopemangkinan TiO2 terdop N dan TiO2 tidak diubah suai telah dikaji untuk pemfotorosotaan reaktif merah 4 (RR4) di bawah sinaran cahaya LED. Tindak balas foto aktif di bawah sinaran cahaya LED diperhatikan daripada TiO2 terdop N dengan 60 min masa penyinaran untuk melengkapkan penyingkiran warna RR4 manakala tiada kemusnahan fotopemangkinan diperhatikan daripada TiO2 tidak diubah suai.

 

Kata kunci: Diod pemancar cahaya; fotopemangkinan; ketuhar gelombang mikro; pendopan nitrogen; reaktif merah 4 pewarna

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