TY  - GEN
CY  - UNIVERSITAS LAMPUNG
ID  - eprints73302
UR  - http://digilib.unila.ac.id/73302/
A1  - SHAFA , ILINA FATICHA
Y1  - 2023/06/05/
N2  - Pada penelitian ini telah dilakukan preparasi katalis Cr2O3 menggunakan metode
presipitasi-gelasi dan preparasi nGO menggunakan metode Hummers
termodifikasi. Preparasi katalis Cr2O3/nGO dilakukan dengan impregnasi
menggunakan alat ultrasonic cleaner sesuai dengan tiga perbandingan massa
Cr2O3/nGO yaitu 0,125/1 ; 0,25/1 ; 0,5/1. Analisis X-Ray Diffraction (XRD)
menunjukkan katalis berukuran 28,19 ; 26,30 dan 26,31 nm. Analisis Diffuse
Reflectance Spectroscopy (DRS) menunjukkan nilai energi celah pita sebesar 1,70
; 1,77 dan 1,80 eV. Analisis Scanning Electron Microscopy (SEM) menunjukkan
bahwa Cr2O3 terdistribusi merata pada permukaan nGO. Nanoselulosa telah
dipreparasi menggunakan metode delignifikasi, bleaching dan hidrolisis asam
sehingga diperoleh nanoselulosa berukuran 16,52 nm dan mempunyai indeks
kristalinitas sebesar 33,03%. Nanoselulosa dikonversi menjadi gula alkohol
menggunakan Cr2O3/nGO di bawah sinar UV disertai aliran gas H2 dengan variasi
waktu 1, 2, 3, 4 dan 5 jam. Hasil konversi menunjukkan bahwa persentase
nanoselulosa terkonversi tertinggi sebesar 36,38% pada variasi katalis 1 nGO : 0,5
Cr2O3 dengan waktu konversi selama 4 jam. Analisis High Performance Liquid
Chromatography (HPLC) menunjukkan katalis Cr2O3/nGO mampu mengkonversi
nanoselulosa menjadi glukosa dengan konsentrasi 56 ppm glukosa, namun belum
mampu mengkonversi nanoselulosa menjadi gula alkohol.
Kata Kunci : Cr2O3, nGO, nanoselulosa, gula alkohol, konversi

In this research, the preparation of the Cr2O3 catalyst using the precipitationgelation
method and the preparation of nGO using the modified Hummers method
were conducted. Furthermore, the preparation of the Cr2O3/nGO catalyst was
carried out using the impregnation method with the help of an ultrasonic cleaner
with three mass ratios of Cr2O3 to nGO which are 0.125/1, 0.25/1, and 0.5/1. XRay
Diffraction (XRD) analysis showed the particle sizes of the catalyst were 28.19
nm, 26.30 nm, and 26.31 nm. Diffuse Reflectance Spectroscopy (DRS) analysis
showed band gap energy values of 1.70 eV, 1.77 eV, and 1.80 eV. Scanning Electron
Microscopy (SEM) study showed an even distribution on the surface of Cr2O3/nGO.
Nanocellulose was prepared using delignification, bleaching, and acid hydrolysis
methods to obtain nanocellulose with a particle size of 16.52 nm with a crystallinity
index of 33.03%. Nanocellulose was converted to sugar alcohol using Cr2O3/nGO
under UV light irradiation accompanied by H2 gas flow with time variation of 1, 2,
3, 4, and 5 hours. The conversion results showed that the highest percentage of
nanocellulose conversion was 36.38%, with a Cr2O3/nGO catalyst ratio of 0.5/1
and a reaction time of 4 hours. High-Performance Liquid Chromatography (HPLC)
analysis showed that Cr2O3/nGO catalyst could convert nanocellulose into glucose
with a concentration of 56 ppm. Still, it was not able to convert nanocellulose into
sugar alcohols.
Keyword : Cr2O3, nGO, nanocellulose, sugar alcohols, conversion
PB  - FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM
TI  - KONVERSI SELULOSA DARI KULIT PISANG KEPOK (Musa paradisiaca
L) MENJADI GULA ALKOHOL MENGGUNAKAN KATALIS Cr2O3/nGO
FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM
UNIVERSITAS LAMPUNG
BANDAR LAMPUNG
2023
AV  - restricted
ER  -