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Synthesis of Al(OH)3 nanoparticles from Indonesian bauxite and tomato waste extract as chelating agent for nanofluids applications
Author(s) -
Arie Hardian,
C Nirmalasari,
S Budiman,
Anceu Murniati,
Valentina Adimurti Kusumaningtyas,
Trisna Yuliana,
Dani Gustaman Syarif
Publication year - 2021
Publication title -
iop conference series earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/882/1/012016
Subject(s) - nanofluid , calcination , zeta potential , materials science , crystallite , gibbsite , bauxite , diffractometer , crystallinity , nanoparticle , chemical engineering , boehmite , nuclear chemistry , nanotechnology , metallurgy , chemistry , aluminium , composite material , organic chemistry , scanning electron microscope , catalysis , engineering
This study aimed to determine the effect of calcination time on the properties of Al(OH) 3 or gibbsite nanoparticles in the sol-gel process, which was then used as the basic material in the manufacturing of water-Al(OH) 3 based nanofluids. Nanofluid is a mixture of basic fluids such as water with solid nanoparticles. Al(OH) 3 nanoparticles have been successfully synthesized from Indonesia local mineral bauxite using the sol-gel method by utilizing tomato waste extract as a chelating agent at a calcination temperature of 700ºC for 1 hour, 3 hours, and 5 hours. The obtained calcined powders were characterized using X-ray diffractometer (XRD). The evaluation toward nanofluids application based on theirs stability based on visual observation and zeta potential. Based on XRD analysis, all calcined powders has single Al(OH) 3 or gibbsite phase. Increasing the calcined temperature gave impact on crystallinity, crystallite size, and reorientation of crystal. The water-Al(OH) 3 nanofluid was relatively less stable with a zeta potential value of -25.2 mV; -26.4 mV; and -17.4 mV for calcination time 1 h, 3 h, and 5 h, respectively.

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