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. AZAMI^1,2, W.I. NAWAWI^1*, 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

 

Received: 4 January 2016/Accepted: 6 February 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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*Corresponding author; email: wan_pdf@yahoo.com