LaCrO3 Nano photocatalyst : The effect of calcination temperature on its activity to cellulose conversion under UV-ray Irradiation

Rudy Tahan Situmeang, Zipora Sembiring, Erwin Simarmata, Tria Yuliarni, Wasinton Simanjuntak, Simon Sembiring

Abstract


LaCrO3 nano photocatalyst had been prepared using sol-gel and freeze-drying method. Preparation of material was carried out by dissolving nitrate salts of lanthanum and chrome in pectin solution, respectively and then it was mixed together and stirred thoroughly using magnetic stirrer while adjusting pH to  11  until the gel formed. After the freeze-drying process, the precursors were subjected directly to the calcination treatment at 600, 700, and 800°C, respectively. Then, the samples were subsequently characterized using the techniques of X-ray diffraction (XRD), DRS and TEM. The result of the cellulose conversion is followed by DNS and HPLC analysis. The results proved that LaCrO3 crystalline phase is formed and its grain size is around 30 nm. DRS analysis also proved that band gap energy is affected by temperature calcination, and its value is around 2.9 eV.  Its activity test said that the calcination temperature affected the conversion of cellulose. The cellulose conversion is more than 20% with the yield of alcohol sugar more than 600 ppm in 45  minutes exposure of the UV irradiation.


Keywords


Nano, cellulose, sol-gel, alcohol sugar, perovskite

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Published by: IOP Publishing and Vietnam Academy of Science and Technology
Frequency: Articles appear online as they are published with print copies published 4 times per year
ISSN: Print: 2043-6254; Online: 2043-6262
DOI Range: 10.1088/issn.2043-6262

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