A Linker-Mediated Self-Assembly Method to Couple Isocharged Nanostructures: Layered Double Hydroxide-CdS Nanohybrids with High Activity for Visible-Light-Induced H2Generation

2014 ◽  
Vol 20 (51) ◽  
pp. 17004-17010 ◽  
Author(s):  
Jang Mee Lee ◽  
Jayavant L. Gunjakar ◽  
Yeilin Ham ◽  
In Young Kim ◽  
Kazunari Domen ◽  
...  
Keyword(s):  
Visible Light ◽  
High Activity ◽  
Layered Double Hydroxide ◽  
Self Assembly ◽  
Assembly Method ◽  
Double Hydroxide

The Effect of Zinc to Aluminium Molar Ratio on the Physico-Chemical Properties of Zinc-Aluminium-3,4-Dichlorophenoxy Acetate Nanocomposite

2013 ◽  
Vol 756 ◽  
pp. 127-134
Author(s):  
Sheikh Ahmad Izaddin Sheikh Mohd Ghazali ◽  
Mohd Zobir Hussein ◽  
Siti Halimah Sarijo
Keyword(s):  
Layered Double Hydroxide ◽  
Mole Fraction ◽  
Self Assembly ◽  
Chemical Properties ◽  
Zinc Ion ◽  
Molar Ratio ◽  
Basal Spacing ◽  
Molar Ratios ◽  
Assembly Method ◽  
Double Hydroxide

Layered double hydroxide (LDH) hybrid materials of Zn-Al-layered double hydroxide-3,4-dichlorophenoxy acetate acidnanocomposites (ZADs) were prepared by direct self-assembly method. The pH of the solution was adjusted to 7.5 using 2M NaOH. Various Zn2+ to Al3+ molar ratios, R ranging from 1 to 6 were used with a fixed concentration of 3,4-D at 0.3 M. The Powder X-ray diffraction (PXRD) patterns showed the formation of well-ordered nanocomposite with the expansion of basal spacing from 8.9 Å in the Zinc-Aluminium-Layered Double Hydroxide (ZAL) to 18.7 - 22.1 Å in the resulting nanocomposites. The Fourier transform infrared (FTIR)spectra for the nanocomposites showed features for both ZAL and ZAD, showing the successful intercalation of the organic moiety into the LDH interlayer. The percentage loading of 3,4-dichlorophenoxy acetati acid(3,4-D) in LDH was found to be increased from 34.7-48.1 % (w/w), as the mole fraction of Al decreased from 0.44-0.15. This study shows that the mole fraction of zinc ion was replaced by aluminium ion in the LDH plays an important role in controlling the physic-chemical properties of the resulting material.

Intercalation of Fenoprofen into Layered Double Hydroxide for the Formation of Controlled Release Anti-Inflammatory Drug

2017 ◽  
Vol 1142 ◽  
pp. 230-233 ◽  
Author(s):  
Siti Halimah Sarijo ◽  
Monica Limau Jadam ◽  
Faizah Md Saleh
Keyword(s):  
Controlled Release ◽  
Organic Compound ◽  
Layered Double Hydroxide ◽  
Self Assembly ◽  
Interlayer Spacing ◽  
Nanocomposite Materials ◽  
Molar Ratio ◽  
Hybrid Nanocomposite ◽  
Assembly Method ◽  
Double Hydroxide

Synthesis of a new hybrid nanocomposite materials, zinc-aluminium-fenoprofen, ZAF was successfully accomplished by self-assembly method with molar ratio of Zn to Al; R=2 at concentration of fenoprofen=0.3 M. As a result of the successful intercalation, the interlayer spacing expanded from 9.8 Å in the zinc-aluminium-layered double hydroxide, ZAL to 20.1 Å in the ZAF hybrid nanocomposite. The FTIR spectra of the ZAF show resemblance peaks of ZAL and fenoprofen indicating the inclusion of the organic compound into the LDH interlamellae. The percentage loading of the guest anion, fenoprofen in ZAL was estimated to be about 63.4% (w/w) calculated from the carbon content.

scholarly journals Removal of Eriochrome Black T DYE from Aqueous Solution by Nickel/Aluminium Layered Double Hydroxide

2019 ◽  
Vol 1 (3) ◽  
pp. 79-86
Author(s):  
Nurdiyana Roslan ◽  
Mazidah Mamat ◽  
Ku Halim Ku Bulat
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxide ◽  
Self Assembly ◽  
Freundlich Isotherm ◽  
Thermogravimetric Analyzer ◽  
Eriochrome Black T ◽  
Dye Pollutants ◽  
Assembly Method ◽  
Infrared Spectrophotometer ◽  
Double Hydroxide

Batik industry is well known in the East Coast of Malaysia, particularly in Terengganu and Kelantan. This industry consumes a lot of water for the batik making process which contributes to high discharge of wastewater containing excess dye pollutants. Hence, in this study, an anionic clay of nickel/aluminium-layered double hydroxide (NiAL) was investigated as a potential adsorbent for the removal of anionic dye of Eriochrome Black T (EBT). The NiAL was synthesized via self-assembly method and characterization of NiAL was carried out using powder X-ray diffraction (PXRD) and Fourier transform infrared spectrophotometer (FTIR). The composition and morphology of NiAL was further analyzed using carbon, hydrogen, nitrogen, sulphur elemental analyzer (CHNS), thermogravimetric analyzer (TGA) and scanning electron microscope (SEM). The potential of NiAL as an adsorbent for the removal of EBT in aqueous solution was tested at different dosages of NiAL. The adsorption ability was analyzed by using two common adsorption isotherms, which were Langmuir and Freundlich models. The adsorption of EBT onto NiAL was governed by Freundlich isotherm model indicating that the adsorption occurs in heterogeneous system.

Synthesis, Characterization and Sustained Release Properties of Zinc-Aluminium-9-Hydroxy-9-Flourenecarboxylate Nanocomposite

2011 ◽  
Vol 422 ◽  
pp. 102-106 ◽  
Author(s):  
Siti Halimah Sarijo ◽  
A Ahmad ◽  
Z. Jubri
Keyword(s):  
Sustained Release ◽  
Layered Double Hydroxide ◽  
Self Assembly ◽  
Plant Growth Regulator ◽  
Sodium Phosphate ◽  
Molar Ratio ◽  
Basal Spacing ◽  
Hybrid Nanocomposite ◽  
Assembly Method ◽  
Double Hydroxide

Zn-Al-9-hydroxy-9-flourenecarboxylate-layered double hydroxide, ZAF nanocomposite was successfully synthesized by direct self-assembly method with Zn to Al molar ratio, R = 4 and 0.4 M 9-hydroxy-9-flourenecarboxylate, 9H9F. Due to the inclusion of a new anion, 9H9F basal spacing expanded from 8.9 Å in the Zn-Al-layered double hydroxide, ZAL to 13.2 Å in the ZAF. The FTIR spectra of the hybrid nanocomposite show resemblance peaks of the ZAL and 9H9F indicating the inclusion of the organic compound into the LDH interlamellae. The percentage loading of 9H9F was found to be 75.9 % (w/w). Sustained release of 9H9F from ZAF into various aqueous solutions was found to be dependent on the incoming anion, with the percentage saturated release of 94%, 72%, and 15% in sodium phosphate, sodium sulfate and sodium chloride aqueous solution 0.0005 M, respectively. This study indicates that ZAL can be used as a host carrier for plant growth regulator, 9H9F with sustained release capability.

Improved Visible-Light-Induced Photocatalytic Performance of ZnAl Layered Double Hydroxide by Incorporation of Ni2+

2018 ◽  
Vol 18 (1) ◽  
pp. 753-760 ◽  
Author(s):  
Min Qi ◽  
Lihui Fan ◽  
Yanming Shen ◽  
Hong Zou ◽  
Xiaolu Tian ◽  
...  
Keyword(s):  
Visible Light ◽  
Layered Double Hydroxide ◽  
Photocatalytic Performance ◽  
Double Hydroxide

Fabrication of a novel ZnO/MMO/CNT nanohybrid derived from multi-cationic layered double hydroxide for photocatalytic degradation of azo dye under visible light

RSC Advances ◽  
2015 ◽  
Vol 5 (25) ◽  
pp. 19675-19685 ◽  
Author(s):  
Fatemeh Khodam ◽  
Zolfaghar Rezvani ◽  
Ali Reza Amani-Ghadim
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Layered Double Hydroxide ◽  
Azo Dye ◽  
Double Hydroxide ◽  
Degradation Of Azo Dye

A facile and effective approach for assembling ZnO/MMO/CNT nanohybrid with excellent photodegradation performance under visible light is reported.

scholarly journals Retracted Article: Synthesis and characterization of Co/Ti layered double hydroxide and its application as a photocatalyst for degradation of aqueous Congo Red

RSC Advances ◽  
2015 ◽  
Vol 5 (112) ◽  
pp. 92189-92206 ◽  
Author(s):  
Priyadarshi Roy Chowdhury ◽  
Krishna G. Bhattacharyya
Keyword(s):  
Visible Light ◽  
Layered Double Hydroxide ◽  
Congo Red ◽  
Synthesis And Characterization ◽  
Retracted Article ◽  
Double Hydroxide

Hydrothermally synthesized 2 : 1 Co/Ti LDH exhibits remarkable visible light assisted degradation of Congo Red (∼99.7%) to simple and less toxic molecules than the parent carcinogenic dye.

Visible light-emission from Eu-doped ZnAl layered-double hydroxide

2017 ◽  
Vol 43 (13) ◽  
pp. 9686-9690 ◽  
Author(s):  
Deok-Ki Cho ◽  
Sang-Seok Lee ◽  
Ji-Soo Lim ◽  
Seong-Ho Baek ◽  
Il-Kyu Park
Keyword(s):  
Visible Light ◽  
Layered Double Hydroxide ◽  
Light Emission ◽  
Double Hydroxide ◽  
Visible Light Emission
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