@mastersthesis{eprints30638,
           month = {Februari},
           title = {KONVERSI SELULOSA LIMBAH TONGKOL JAGUNG MENJADI
GULA ALKOHOL MENGGUNAKAN NANOKATALIS Ni (1-x)ZnxFe2O4},
          school = { UNIVERSITAS LAMPUNG},
          author = {1527011010 MIRANTI SAFITRI },
            year = {2018},
             url = {http://digilib.unila.ac.id/30638/},
        abstract = {Dalam penelitian ini telah dilakukan konversi selulosa limbah tongkol jagung
menggunakan nanokatalis Ni(1-x)ZnxFe2O4 (dengan x = 0,1-0,3). Katalis dibuat
menggunakan metode sol gel dengan pektin sebagai pengemulsi. Data XRD dan
TEM menunjukkan sudah terbentuknya katalis nikel seng ferrit dengan bentuk
kubus spinel. Ukuran partikel berdasarkan persamaan Debye-Scherrer berkisar
antara 7,42-9,87 nm. Katalis memiliki situs asam Br{\o}nsted-Lowry dan situs asam
Lewis dengan jumlah situs asam sebesar 0,9289-1,0636 mmol/gram. Nilai energi
band-gap katalis dengan DRS sebesar 2,02-2,07 eV. Nilai energi band-gap akan
meningkat seiring bertambahnya konsentrasi Zn. Nanoselulosa tongkol jagung
dipreparasi melalui tahapan delignifikasi, bleaching, dan hidrolisis dengan asam
sulfat. Kadar selulosa didapatkan sebesar 92,12\% dengan kristalinitas 67,12\%.
Nanoselulosa yang dipreparasi merupakan nanofibril selulosa dengan diameter
20-25 nm. Konversi nanoselulosa tongkol jagung dengan katalis Ni(1-x)ZnxFe2O4
dilakukan dengan irradiasi lampu UV 125 watt dengan waktu 30, 45 dan 60
menit. Katalis aktif memutuskan ikatan glikosidik selulosa menjadi glukosa. Hasil
analisis KCKT dari sampel hasil uji fotokatalitik menghasilkan glukosa dengan
konsentrasi 0,05-0,10 \%.
Kata kunci : gula alkohol, nanokatalis, nanoselulosa, spinel ferit, tongkol jagung,

abstract
In this research, conversion of corn cob cellulose into sugar alcohol using
nanosize Ni(1-x)ZnxFe2O4 (with x = 0,1-0,3) as catalyst was performed. Catalyst
was prepared by sol-gel method using pectin as emulsifier. XRD and TEM data
showed formation of nickel zinc ferrite with spinel cubic shape. Particle size
according to Debye-Sherrer equation is in the range of 7,42-9,28 nm. Catalyst has
Br{\o}nsted-lowry and Lewis acid site with acidity in the range of 0,9289-1,0636
mmol/gram. The catalysts were found to have band-gap energy ranging from 2.02
to 2.07 eV, in which the band-gap energy increases with increased Zn
concentrations. Corn cob nanocellulose was prepared by stepwise process of
delignification, bleaching, and sulfuric acid hydrolysis. The product with cellulose
content of 90.09\% and crystallinity of 67.12\% was obtained, in the form of
nanofibrilated cellulose with diameter 20-25 nm. Conversion of corn cobs
nanocellulose with Ni(1-x)ZnxFe2O4 catalyst was performed by irradiating the
sample with UV lamp of 125 Watt with irradiation times of 30, 45 and 60
minutes. The experimental results demonstrated that the catalyst exhibited activity
to breaks the glycosidic bond of cellulose, led to formation of glucose, with the
concentration of 0,05-0,10\% according to HPLC analysis.
Keywords: corn cob, nanocellulose, nanocatalyst, sugar alcohol, spinel ferrite.
}
}