Malaysian Journal of Analytical Sciences Vol 26 No 4 (2022): 819 - 828

 

 

 

 

PRELIMINARY STUDIES ON SUNLIGHT ASSISTED DEGRADATION OF 2-CHLOROPHENOL USING MoS₂/GO AS PHOTOCATALYST

 

(Kajian Awal Mengenai Cahaya Tampak Dituruti Penyusutan Sinaran 2-klorofenol Menggunakan MoS₂/GO Sebagai Pemangkin Cahaya)

 

Kavirajaa Pandian Sambasevam, Syara Syazliana Muhammad Rajab, Izyan Najwa Mohd Norsham, Siti Nor Atika Baharin*

 

Advanced Material for Environmental Remediation (AMER) Research Group, Faculty of Applied Sciences,

University Teknologi MARA, Cawangan Negeri Sembilan, Kampus Kuala Pilah,

 72000, Kuala Pilah, Negeri Sembilan, Malaysia

 

*Corresponding author:  atikabaharin@uitm.edu.my

 

 

Received: 14 September 2021; Accepted: 24 March 2022; Published: 25 August 2022

 

 

Abstract

This study highlighted preliminary studies on photodegradation of 2-chlorophenol using MoS₂/rGO photocatalyst with different weight ratios under sunlight irradiation. The 2-chlorophenol is known as one of the most dangerous pollutant due to its hazardous properties of mutagenicity, carcinogenicity and eco-pollutant. The MoS₂/rGO photocatalysts were synthesized using the hydrothermal method and used for the degradation of 2-chlorophenol under solar light irradiation. Three different compositions of MoS₂/rGO (1%, 5% and 15%) were synthesized with different weight ratio of MoS₂. The composites material of MoS₂, GO and MoS₂/rGO was characterized by FTIR and XRD indicating successful formation of MoS₂/rGO composites. The photodegradation of the 10 ppm of 2-chlorophenol were observed under the exposure of sunlight for 180 minutes and analyzed using UV-VIS to measure percent degradation of 2-chlorophenol. 1% MoS₂/rGO has been chosen as the composite to degrade 2-chlorophenol due to having the highest percent degradation of 51.41% among other photocatalysts.

 

Keywords:   graphene oxide, molybdenum disulfide, photocatalytic degradation, semiconductor photocatalyst, solar irradiation

 

Abstrak

Kajian in menekankan kajian awal mengenai fotodegradasi 2-klorofenol dengan menggunakan berat ratio pemangkin cahaya MoS₂/rGO yang berlainan dibawah radiasi matahari. 2-klorofenol dikenali sebagai salah satu bahan pencemar yang mempunyai ciri-ciri merbahaya seperti mutagenisiti, karsinogenik dan eko-pencemar. Komposit MoS2/rGO telah disintesis menggunakan kaedah hidroterma. Kaedah fotokatalisis yang menggunakan MoS₂/rGO sebagai pemangkin cahaya untuk merosotkan 2-klorofenol dibawah sinaran matahari. Tiga komposisi MoS₂/rGO yang berlainan (1%, 5% and 15%) telah disintesis menggunakan nisbah berat MoS₂ yang berbeza. Bahan komposit MoS₂, GO dan MoS₂/rGO yang dicirikan menggunakan FTIR dan XRD telah menunjukkan hasil jaya pembentukan komposit MoS₂/rGO dengan jayanya. Penyusutan sinaran oleh 10 ppm 2-klorofenol telah diperhatikan dibawah sinaran matahari selama 180 minit telah dianalisiskan dengan UV-VIS untuk mengukur peratus penyusutan sinaran 2-klorofenol. 1% MoS2/rGO telah dipilih untuk merosotkan 2-klorofenol kerana mempunyai peratusan penyosotan yang tinggi iaitu 51.41%.

 

Kata kunci: grafena oksida, molibdenum disulfida, degradasi fotokatalitik, pemangkin cahaya semikonduktor, penyinaran suria

 

 

Graphical Abstract

 

 

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