Microreactor-assisted synthesis of α-alumina nanoparticles

Yu, Hui; Wang, Mengdi; Zhou, Jinghui; Yuan, Biao; Luo, Jin; Wu, Wei; Chen, Zan; Yu, Ruixiang

doi:10.1016/j.ceramint.2020.02.105

Cited by 16 publications

(5 citation statements)

References 45 publications

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“…In contrast, alumina exhibits broad peaks, indicating its amorphous nature. This observation aligns with the results reported in the literature 33 , 34 where authors observed the formation of amorphous alumina at a calcination temperature of 900 °C. Upon impregnating RPS with a-Al 2 O 3 to form APS adsorbent, the formation of spectra of both samples (RPS and a-Al 2 O 3 ) were seen in the figure.…”

Section: Resultssupporting

confidence: 93%

Adsorption of lead and chromium ions from electroplating wastewater using plantain stalk modified by amorphous alumina developed from waste cans

Ajala,

Aliyu,

Ajala

et al. 2024

Sci Rep

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Waste beneficiation is key to environmental protection and the realisation of a circular economy. Herein, amorphous alumina (a-Al2O3) derived from aluminium waste cans (AWC) was used to modify plantain stalk as an adsorbent for sequestration of lead (II) and chromium (VI) ions from electroplating wastewater. Raw plantain-stalk (RPS) and amorphous-alumina modified plantain stalk (APS) developed as adsorbents were characterised using various equipment such as x-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), and Brunauer–Emmett–Teller (BET). The FTIR revealed that the adsorbents are rich in functional groups that could promote the adsorption process which includes carboxyl, hydroxyl, and aliphatic groups. Also, the BET analysis showed a substantial increase in the surface area of APS (174.448 m2/g) compared to that of RPS (40.531 m2/g) which could be due to the effect of modification by the a-Al2O3. The batch adsorption studies revealed that the APS achieved 99.38% and 98.33% removal of Cr(VI) and Pb(II), respectively, which is superior to RPS adsorption efficiency. Also, the estimated and experimental data for the APS compared well under all the kinetic models studied with R2 > 0.88. This suggested that chemisorption is the most plausible adsorption mechanism of Cr(VI) and Pb(II) onto the APS. Further analysis showed that the Cr(VI) and Pb(II) adsorption followed the Langmuir model with the RL value of 0.038 and 0.999, respectively, which indicated that the two metal ions were effectively adsorbed onto the APS. Therefore, this work demonstrated that the modification of plantain-stalk with amorphous-alumina derived from AWC enhanced the characteristics of the APS and favoured its adsorption of the selected heavy metals.

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Section: Resultssupporting

confidence: 93%

Adsorption of lead and chromium ions from electroplating wastewater using plantain stalk modified by amorphous alumina developed from waste cans

Ajala,

Aliyu,

Ajala

et al. 2024

Sci Rep

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“…This may be due to transient nucleation during mixing, leading to particle growth during rapid and uniform mixing in the microreactor. 39–41 These results demonstrate that the synergistic effect of raw materials concentration and feed flow rates have a certain degree of influence on the particle size distribution of Ni–Co PBA.…”

Section: Resultsmentioning

confidence: 79%

Continuous and large-scale synthesis of Ni–Co PBA nanoparticles with a tunable particle size in a microreactor

Wang

Liu

et al. 2023

New J. Chem.

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“…To assess the influence of the concentration of the continuous phase, a series of experiments with concentrations of 0.4-1.4 mol l −1 was conducted, while the other conditions, such as crystal temperature, pH value, and washing methods, were fixed. The samples are named as MA-c. As shown in table 3 and figure 5, the high efficiency heat and mass transfer performance of the membrane dispersion microreactor led to the formation of γ-Al 2 O 3 nanofibers [37]. MA-0.8, which was prepared at a continuous phase concentration of 0.8 mol l −1 , demonstrated superior pore structure properties, and the specific surface area and pore volume reached 308.0 m 2 g −1 , and 1.60 ml g −1 , respectively.…”

Section: Influence Of Continuous Phase Concentrationmentioning

confidence: 98%

Template-free method for the synthesis of high-pore-volume γ-Al₂O₃ nanofibers in a membrane dispersion microreactor

Wan

Wang

et al. 2021

Nanotechnology

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Mesoporous γ-Al2O3 nanofibers with high pore volume and uniform pore size distributions were successfully synthesized via a template-free method in a membrane dispersion microreactor followed by calcination. The effects of crystal temperature, pH values, continuous phase concentration and washing solvent on the γ-Al2O3 nanofibers were carefully studied. The results showed that the as-obtained γ-Al2O3 nanofibers showed a length of 40–60 nm and a width of 3.2–3.4 nm, which were attributed to the high microscopic mixing rate in the membrane dispersion microreactor. Moreover, the precursors of γ-Al2O3 nanofibers treated with deionized water and mixed deionized water/alcohol solution had high pore volumes, reaching to 1.60 ml g−1 and 2.00 ml g−1, respectively. Furthermore, the adsorption performance of γ-Al2O3 nanofibers with high pore volumes was also investigated. These fibers showed an excellent adsorption capacity of 1323.68 mg g−1 for the removal of Congo red from aqueous solution, thereby indicating their potential for applications in adsorption and other related areas.

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Microreactor-assisted synthesis of α-alumina nanoparticles

Cited by 16 publications

References 45 publications

Adsorption of lead and chromium ions from electroplating wastewater using plantain stalk modified by amorphous alumina developed from waste cans

Adsorption of lead and chromium ions from electroplating wastewater using plantain stalk modified by amorphous alumina developed from waste cans

Continuous and large-scale synthesis of Ni–Co PBA nanoparticles with a tunable particle size in a microreactor

Template-free method for the synthesis of high-pore-volume γ-Al₂O₃ nanofibers in a membrane dispersion microreactor

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Microreactor-assisted synthesis of α-alumina nanoparticles

Cited by 16 publications

References 45 publications

Adsorption of lead and chromium ions from electroplating wastewater using plantain stalk modified by amorphous alumina developed from waste cans

Adsorption of lead and chromium ions from electroplating wastewater using plantain stalk modified by amorphous alumina developed from waste cans

Continuous and large-scale synthesis of Ni–Co PBA nanoparticles with a tunable particle size in a microreactor

Template-free method for the synthesis of high-pore-volume γ-Al2O3 nanofibers in a membrane dispersion microreactor

Contact Info

Product

Resources

About

Template-free method for the synthesis of high-pore-volume γ-Al₂O₃ nanofibers in a membrane dispersion microreactor