Utilization of natural indicators for borax identification in the Indonesian tofu

Purbaningtias, Tri Esti; Lestari, Intan; Wiyantoko, Bayu; Kurniawati, Puji; Sriadryani, Devi

doi:10.1063/1.4978130

Cited by 4 publications

(2 citation statements)

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“…Table 3 showed that when higher amounts of MC were used, pH of sappan wood extracts after adsorption decreased from 5.57 to 4.46 while the pH of sappan wood extracts after adsorption increased from 5.57 to 7.23 with the increasing amounts of DC. Moreover, sappan wood extract is pH sensitive [28], resulted in the change of the color and the wavelength of the maximum absorbance of the sappan wood extract after the adsorption. Hence, the effect of the amount of adsorbent dosage on the adsorption was observed from the comparison of UV-Vis DRS and CIELAB of the lake pigments.…”

Section: Effect Of Adsorbent Dosage On the Adsorptionmentioning

confidence: 99%

Preparation and characterization of lake pigments from sappan wood using Thai local clays

et al. 2020

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Thai local clays: Munpoo clay (MC) and Dindang clay (DC) were utilized as the adsorbents for preparation of the lake pigments from sappan wood. The lake pigment which was prepared by using MC as the adsorbent (L-MC) appeared reddish-brown while a deeper reddish-brown color of the lake pigment (L-DC) was obtained by using DC as the adsorbent. Characterization of MC, DC, L-MC, and L-DC was accomplished by XRD, SEM, FT-IR, BET, TGA and UV-Vis DRS. The effects of adsorbent dosage, pH of sappan wood extract and time on the adsorption were also investigated. The results revealed that silicon oxide and aluminium silicate hydroxide were identified as the main component of MC and DC. L-MC and L-DC exhibited similar XRD pattern compared to MC and DC but with the lower crystallinities. Brazilein from sappan wood could not only form complexes with Al and Si on the surface of the clays but also interact with clay surface via electrostatic interactions, which led to the reddish-brown color of L-MC and L-DC. Furthermore, our method could benefit and promote uses of natural clays in the production of lake pigment which could be used in paints and textile dyeing processes.

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Section: Effect Of Adsorbent Dosage On the Adsorptionmentioning

confidence: 99%

Preparation and characterization of lake pigments from sappan wood using Thai local clays

et al. 2020

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“…The chemical structure of brazilein is shown in Figure 1. Brazilein has many useful as photo sensitizer for dye sensitized solar cell [25], color pigment [26], acid base indicator [27], sensor [28], antioxidant and antitumor [29,30]. In the present work, the brazilein was used as a sensitizer of ZnO nanorods photo-catalyst to extend the light absorption in visible region.…”

Section: Introductionmentioning

confidence: 99%

Brazilein modified zinc oxide nanorods with enhanced visible light-responsive photocatalytic efficiency

et al. 2022

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Photocatalytic efficiency of ZnO nanorods has been investigated with respect to the concentration of brazilein. Brazilein modified ZnO nanorods were prepared by an impregnation process with 1.0%w/v, 2.5%w/v, and 5.0%w/v of brazilein solution. In order to correlate the variation in concentration distributions and photocatalytic performance, the phase composition, optical properties, and photo-catalytic activities of brazilein modified ZnO nanorods prepared with different brazilein concentrations have been investigated and compared to an unmodified ZnO nanorods. The photocatalytic properties were measured in terms of indigo carmine degradation under visible light irradiation. It was found that ZnO nanorods with the highest visible light-responsive photocatalytic efficiency were achieved by the modification of 5.0%w/v of brazilein resulting in indigo carmine degraded faster than the case of unmodified ZnO nanorod about 60% within 5 h.

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Comparative analysis method of C-organic in fertilizers by gravimetry and spectrophotometry

Purbaningtias¹,

Qayyumah²,

Kurniawati³

et al. 2018

AIP Conference Proceedings

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Utilization of natural indicators for borax identification in the Indonesian tofu

Cited by 4 publications

References 1 publication

Preparation and characterization of lake pigments from sappan wood using Thai local clays

Preparation and characterization of lake pigments from sappan wood using Thai local clays

Brazilein modified zinc oxide nanorods with enhanced visible light-responsive photocatalytic efficiency

Comparative analysis method of C-organic in fertilizers by gravimetry and spectrophotometry

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