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Sains Malaysiana 46(4)(2017):
637–644 http://dx.doi.org/10.17576/jsm-2017-4604-017
Bifunctional Regenerated
Cellulose Membrane Containing TiO2 Nanoparticles for Absorption and Photocatalytic
Decomposition (DwiFungsi Membran Selulosa
yang Terjana Semula dengan Kandungan TiO2
untuk Proses Penyerapan dan
Penguraian secara Fotopemangkinan) EVYAN
YANG
CHIA
YAN1,2,
SARANI
ZAKARIA1*,
CHIN
HUA
CHIA1
& THOMAS
ROSENAU3 1Bioresources
and Biorefinery Laboratory, School of Applied Physics, Faculty of
Science and
Technology,Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor
Darul Ehsan Malaysia 2Department
of Applied Sciences, Faculty of Science and Technology, Nilai University,
1, Persiaran Universiti, 71800 Nilai, Negeri Sembilan Darul Khusus,
Malaysia 3Division
of Chemistry of Renewable Resource, Muthgasse 18, A-1190 Wien, Universität
für Bodenkultur Wien, University of Natural Resources and Life Science,
Vienn, Austria Received:
20 April 2016/Accepted: 20 September 2016 ABSTRACT A simple and green method
was presented to embed TiO2 on
regenerated cellulose membranes via cellulose dissolution-regeneration
process. The physical, chemical and mechanical properties of the
composite membranes were characterized by X-ray diffraction (XRD), scanning electron microscopy
(SEM), Fourier- Transform Infrared (FTIR),
ultraviolet (UV) - visible spectroscopy and tensile test. The results
indicated that cotton linter has been converted from cellulose I
to cellulose II after the regeneration process, while the TiO2 nanoparticles
embedded inside the membrane maintaining its original crystal structures.
The TiO2 composite membranes possessed
high ability of water absorption with total pore volume ranged from
0.45±0.01 to 0.53±0.02 cm3/g. The elongation at break of
the prepared membranes increased 29% averagely from dry state to
wet state. The tensile strength of the membranes remained at a minimum
value of 0.50±0.03 MPa in wet state thus enabled the films to withstand
in wet for long period of time under weak UV irradiation. The regenerated cellulose membranes with
TiO2 performed well in photocatalytic
activity while exhibiting distinct absorption abilities. This study
provides a potential application in energy-saving decomposition
system in which the dye compound can be easily removed via two simultaneous
pathways: Absorption and photocatalytic decomposition. Keywords: Absorption;
mechanical properties; photocatalysis; regenerated celloluse ABSTRAK Kaedah yang mudah telah
dikemukakan untuk menerap TiO2 pada
membran selulosa yang diperbaharui melalui proses pelarutan-penjanaan
semula selulosa. XRD, SEM, FTIR,
Spektroskopi UV - Vis dan mesin ujian tegangan digunakan untuk mencirikan
sifat fizikal, kimia dan mekanik membran komposit. Hasil analisis
menunjukkan linter kapas telah berubah daripada selulosa I kepada
selulosa II selepas proses penjanaan semula. Manakala, TiO2
yang bertabur dalam membran mengekalkan struktur kristalnya.
Membran komposit TiO2
yang dihasilkan memiliki keupayaan penyerapan air
yang tinggi dengan jumlah liang dari 0.45±0.01-0.53±0.02 cm3/g. Keseluruhannya, pemanjangan
membran kering meningkat sebanyak 29% berbanding dengan membran
dalam keadaan basah. Membran yang dihasilkan dapat mengekalkan kekuatan
tegangan pada nilai minimum 0.05±0.03 MPa dalam keadaan basah untuk
tempoh yang panjang di bawah sinaran UV yang lemah. Membran selulosa
berkandungan TiO2
menunjukkan prestasi yang baik dalam aktiviti
foto-pemangkinan sementara mempamerkan
keupayaan penyerapan. Kata kunci: Foto-pemangkinan; membran terjana semula; penyerapan;
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