Analisis Sifat Optik, Aktivitas Fotokatalitik, dan Probe Reactive Oxygen Species pada Copper Indium Sulfide Quantum Dots dengan Penambahan TiO2 dalam Komposit Nanofiber Polyacrylonitrile/Polycaprolactone

Widyastuti, Risa Wahyu (2022) Analisis Sifat Optik, Aktivitas Fotokatalitik, dan Probe Reactive Oxygen Species pada Copper Indium Sulfide Quantum Dots dengan Penambahan TiO2 dalam Komposit Nanofiber Polyacrylonitrile/Polycaprolactone. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Fotokatalis berbasis semikonduktor seperti CuInS2 Quantum Dots (CIS QDs) kompatibel untuk dikembangkan sebagai material self-disinfect karena dapat memanfaatkan energi foton untuk membentuk Reactive Oxygen Species (ROS) sebagai agen fotodinamik. Penambahan TiO2 dan penggunaan CIS QDs sebagai filler nanofiber diamati untuk mendapatkan sifat optik, aktivitas fotokatalitik, dan probe ROS. Penambahan TiO2 mampu memperlebar bandgap energy, menggeser absorption edge ke daerah biru, meningkatkan laju degradasi polutan organik dan mendekomposisi probe ROS (1O2) dengan persentase penurunan absorbansi yang lebih tinggi. Penggunaan nanopartikel CIS QDs dan CIS QDs/TiO2 sebagai filler dalam nanofiber mampu menurunkan laju degradasi, serta mendekomposisi probe ROS (1O2) dengan persentase penurunan absorbansi yang lebih kecil daripada dekomposisi dengan nanopartikel. Iradiasi cahaya tampak pada seluruh sampel memberikan laju degradasi yang semakin besar pada aktivitas fotokatalitik, serta mampu mendekomposisi probe ROS (1O2) dengan persentase yang lebih tinggi daripada tanpa adanya iradiasi (kondisi gelap).
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Semiconductor-based photocatalysts such as CuInS2 Quantum
Dots (CIS QDs) are compatible to be developed as disinfectants
because they can utilize photon energy to form Reactive Oxygen
Species (ROS) as photodynamic agents. The addition of TiO2 and
the use of CIS QDs as nanofiber filler were observed to obtain
optical properties, photocatalytic activity, and ROS probes. The
addition of TiO2 can widen the bandgap energy, by shifting the
absorption edge to the blue region, increasing the rate of
degradation of organic pollutants, and decomposing the ROS (1O2)
probe with a higher percentage decrease in absorbance. The use
of CIS QDs and CIS QDs/TiO2 nanoparticles as fillers in
nanofibers was able to reduce the rate of degradation, as well as
decompose the ROS (1O2) probe with a smaller percentage of
absorbance reduction than decomposition with nanoparticles.
Visible light irradiation in all samples gave a higher rate of
degradation of photocatalytic activity and was able to decompose
probe ROS (1O2) with a higher proportion than in the absence of
irradiation (dark conditions).

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	CuInS2 QDs, fotokatalisis, nanofiber, ROS, TiO2, photocatalysis
Subjects:	T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Risa Wahyu Widyastuti
Date Deposited:	04 Feb 2022 01:33
Last Modified:	04 Feb 2022 01:33
URI:	http://repository.its.ac.id/id/eprint/92773

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