Malaysian Journal of Analytical Sciences Vol 23 No 5 (2019): 771 - 780

DOI: 10.17576/mjas-2019-2305-02

 

 

 

VISIBLE LIGHT DRIVEN PHOTOCATALYTIC DEGRADATION OF PARACETAMOL USING INCENSE ASH SUPPORTED ZnO NANOCOMPOSITES

 

(Degradasi Paracetamol secara Pemangkinan Foto dengan Penggunaan Komposit Nano ZnO berasaskan Abu Kemenyan)

 

Pei Teng Lum*, Keng Yuen Foo, Nor Azazi Zakaria

 

River Engineering and Urban Drainage Research Centre (REDAC), Engineering Campus,

Universiti Sains Malaysia,14300 Nibong Tebal, Penang, Malaysia

 

*Corresponding author:  peiteng1013@gmail.com

 

 

Received: 10 July 2019; Accepted: 3 September 2019

 

 

Abstract

In this work, the preparation of a newly synthesized incense ash (IA) supported zinc oxide (ZnO) nanocomposite has been attempted using a simple physical coating method. The physical and chemical properties of the nanocomposite were examined by using scanning electron microscopy (SEM), Fourier Transform Infrared Spectroscopy (FT-IR) and pore structural analysis. The photocatalytic activity was examined by performing the batch photocatalytic degradation of paracetamol (PCM). The preparation and experimental parameters including the ash impregnation ratio, catalyst loadings, initial PCM concentration and irradiation time were accessed. Morphological study revealed that highly porous structure of IA provides a suitable supporting surface area for the better deposition of ZnO to offer the enhanced adsorption and photodegradation reaction. A complete degradation with the high concentration of 50 mg/L was achieved within 3.5 hours. High stability of synthesized nanocomposite was demonstrated from the reusability test, with higher than 95% of removal even after five successive regeneration cycles. The present study provides an efficient photocatalytic degradation route by IA supported ZnO nanocomposite in PCM treatment, one of the emerging pollutants in wastewater effluents. 

 

Keywords:  incense ash, nanocomposites, paracetamol, photodegradation

 

Abstrak

Dalam kajian ini, penyediaan komposit nano zink oksida (ZnO) berasaskan abu kemenyan (IA) melalui teknik salutan fizikal telah dicuba. Ciri-ciri fizikal dan kimia komposit nano telah dikendalikan dengan menggunakan mikroskop imbasan elektron (SEM), Spektroskopi Infamerah Transformasi Fourier (FT-IR) dan analisis keliangan. Prestasi pemangkinan foto diuji dengan degradasi foto bagi paracetamol (PCM). Parameter penyediaan dan eksperimen termasuk nisbah jerap abu, dos pemangkin, kepekatan asal pewarna dan masa penyinaran telah dikaji. Kajian morfologi permukaan menunjukkan struktur IA yang berliang sesuai untuk dijadikan permukaan sokongan bagi pemendapan ZnO yang lebih lengkap dan menawarkan kecekapan tindak balas pemangkinan foto. Degradasi yang sempurna dengan kepekatan asal 50 mg/L dicapai dalam masa 3.5 jam. Ketahanan komposit nano ini yang tinggi telah ditunjukkan dari ujian penggunaan semula, dengan kecekapan degradasi foto yang melebihi 95% walaupun selepas lima kitaran penggunaannya. Kajian ini menzahirkan laluan degradasi pemangkinan foto yang cekap dengan penggunaan komposit nano ZnO berasaskan IA dalam perawatan PCM, salah satu bahan pencemar yang muncul dalam efluen air sisa.

 

Kata kunci:  abu kemenyan, komposit nano, paracetamol, degradasi foto

 

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