New insight into electrochemical-induced synthesis of NiAl2O4/Al2O3: Synergistic effect of surface hydroxyl groups and magnetism for enhanced adsorptivity of Pd(II)

Salleh, Nur Fatien Muhamad; Jalil, Aishah Abd.; Triwahyono, Sugeng; Efendi, Jon; Mukti, Rino R.; Hameed, B.H.

doi:10.1016/j.apsusc.2015.05.048

Cited by 48 publications

(15 citation statements)

References 47 publications

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“…It is noteworthy that our results are on par with other inorganic adsorbents for the adsorption of heavy metals. Salleh et al, reported the adsorption capacity of Pd 2+ on Ni/Al 2 O 3 -E exhibits a loss of 18% after five cycles of adsorption . On the other hand, the adsorption of Pb 2+ and MnO 4 – on NH 2 /MCM-41/NTAA showed a decrease of 8 and 10%, respectively, after five cycles .…”

Section: Results and Discussionsupporting

confidence: 61%

“…Salleh et al, reported the adsorption capacity of Pd 2+ on Ni/Al 2 O 3 -E exhibits a loss of 18% after five cycles of adsorption. 37 On the other hand, the adsorption of Pb 2+ and MnO 4 − on NH 2 /MCM-41/NTAA showed a decrease of 8 and 10%, respectively, after five cycles. 38 This result suggests that Zr 10 /MSN has practical potential to be used as an adsorbent for Cr(VI) removal and is comparable with other studies.…”

Section: Resultsmentioning

confidence: 99%

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Zirconium-Loaded Mesostructured Silica Nanoparticles Adsorbent for Removal of Hexavalent Chromium from Aqueous Solution

Triwahyono¹,

Salamun²,

Jalil³

et al. 2018

Ind. Eng. Chem. Res.

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Zirconium-loaded mesostructured silica nanoparticles (Zr/MSN) were developed for the removal of hexavalent chromium (Cr(VI)) from aqueous solutions. X-ray diffraction, transmission electron microscopy, and Brunauer− Emmett−Teller results revealed that both MSN and Zr/MSN showed a characteristic highly ordered hexagonal pore structure with a high specific area of 821−1219 m 2 g −1 . Fourier transform infrared analysis showed that the presence of Zr diminished the absorbance band that was assigned to silanol groups of the structural defect sites, while XPS analysis of the binding energy of Si−O−Zr indicated interactions between the silanol groups and zirconium. The interaction of zirconium and silanol groups from the structural defect sites generated bidentate zirconium, which acted as an active site for the adsorption. The experimental results showed that the modification of MSN with zirconium significantly enhanced the adsorption capacity for Cr(VI). The equilibrium isotherm data showed that the adsorption process was best described by the Langmuir isotherm with 104 mg g −1 maximum adsorption capacity, while the kinetics of Cr(VI) adsorption followed a pseudo-second-order kinetic model. The thermodynamic properties confirmed that the adsorption of Cr(VI) onto Zr/MSN was spontaneous and endothermic in nature, with an activation energy of 24 kJ mol −1 showing that the adsorption was a chemisorption process.

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Section: Results and Discussionsupporting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Zirconium-Loaded Mesostructured Silica Nanoparticles Adsorbent for Removal of Hexavalent Chromium from Aqueous Solution

Triwahyono¹,

Salamun²,

Jalil³

et al. 2018

Ind. Eng. Chem. Res.

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“…48 Meanwhile, the positive value of DS suggests an increase in randomness at the solid-solution interface during the adsorption of MB from aqueous solution onto S-MSN, which demonstrated a higher affinity of MB towards S-MSN. 52 The overall DG value during the adsorption was negative for the range of temperatures investigated, which increased in magnitude as the temperature increased. This may correspond to an increase in the degree of spontaneity at elevated temperatures.…”

Section: Thermodynamics Studymentioning

confidence: 90%

“…The positive ∆H° value confirmed the endothermic nature of the adsorption, which was in agreement with the chemisorption process result obtained from the isotherm and kinetics studies 48 . Meanwhile, the positive value of ∆S° suggests an increase in randomness at the solidsolution interface during the adsorption of MB from aqueous solution onto S-MSN, which demonstrated a higher affinity of MB towards S-MSN 52 . The overall ∆G° value during the adsorption was negative for the range of temperatures investigated, which increased in magnitude as the temperature increased.…”

Section: Thermodynamics Studymentioning

confidence: 99%

Grape-like mesostructured silica nanoparticle-decorated single-walled carbon nanotubes: silica growth and dye adsorptivity

et al. 2015

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ARTICLE This journal isSingle-walled carbon nanotubes (SWCNTs)-mesostructured silica nanoparticle (MSN) adsorbents (S-MSNs) were prepared through a simple one-step method with various loadings of SWCNTs. Their surface properties were characterized by XRD, TEM, N 2 physisorption, and FTIR spectroscopy. A grape-like S-MSN was produced, for which the growth of MSNs became intense with increasing CNT loading. A bimodal pore structure also developed, which increased the average pore size and pore volume, but decreased the surface area. The increasing amount of CNTs was found to provide more sites for silica growth that enhanced the adsorptivity of the S-MSNs toward methylene blue (MB) dye. Accordingly, 0.1 g L -1 5 wt% S-MSN was able to adsorb 478 mg g -1 (q m ) of 50 mg L -1 MB at pH 7 and 323 K. The equilibrium data were evaluated using the Langmuir, Freundlich, Redlich-Peterson, and Dubinin-Radushkevich isotherm models, with the Langmuir and Redlich-Peterson models affording the best fit to the adsorption data. The adsorption was best described by a pseudo-second-order kinetics model and thermodynamically favored the endothermic chemisorption process. These results indicated the potential of S-MSN as an effective new adsorbent for dye adsorption.

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“…Recently, nickel based spinel catalysts have been widely used in CO 2 hydrogenation reaction due to their low cost and superior catalytic activity [20][21][22]. Further, they were also used in other fields such as in adsorption [23], sensors [24] and as flexible materials [25]. They have also been used as catalyst support due to its low reactivity with the active phase and its high resistance to high temperatures and acidic or basic atmospheres [26].…”

Section: Introductionmentioning

confidence: 99%

Ni–Zn–Al-Based Oxide/Spinel Nanostructures for High Performance, Methane-Selective CO2 Hydrogenation Reactions

et al. 2019

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In the present study, NiO modified ZnAl 2 O 4 and ZnO modified NiAl 2 O 4 spinel along with pure Al 2 O 3 , ZnAl 2 O 4 and NiAl 2 O 4 for comparison in the CO 2 hydrogenation reaction have been investigated. It was found that NiAl 2 O 4 , NiO/ZnAl 2 O 4 and ZnO/NiAl 2 O 4 catalysts exhibited outstanding activity and selectivity towards methane even at high temperature compared to similar spinel structures reported in the literature. NiO/ZnAl 2 O 4 catalyst showed CO 2 consumption rate of ~ 19 μmol/g·s at 600 °C and ~ 85% as well as ~ 50% of methane selectivity at 450 °C and 600 °C, respectively. The high activity and selectivity of methane can be attributed to the presence of metallic Ni and Ni/NiO/ZnAl 2 O 4 interface under the reaction conditions as evidenced by the XRD results.

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New insight into electrochemical-induced synthesis of NiAl2O4/Al2O3: Synergistic effect of surface hydroxyl groups and magnetism for enhanced adsorptivity of Pd(II)

Cited by 48 publications

References 47 publications

Zirconium-Loaded Mesostructured Silica Nanoparticles Adsorbent for Removal of Hexavalent Chromium from Aqueous Solution

Zirconium-Loaded Mesostructured Silica Nanoparticles Adsorbent for Removal of Hexavalent Chromium from Aqueous Solution

Grape-like mesostructured silica nanoparticle-decorated single-walled carbon nanotubes: silica growth and dye adsorptivity

Ni–Zn–Al-Based Oxide/Spinel Nanostructures for High Performance, Methane-Selective CO2 Hydrogenation Reactions

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