Sol–Gel Derived Boehmite as an Efficient and Robust Carrier for Enzyme Encapsulation

Zhu, Yuanyuan; Jiang, Zhongyi; Zhang, Lei; Shi, Jiafu; Yang, Dong

doi:10.1021/ie2015069

Cited by 18 publications

(30 citation statements)

References 41 publications

(73 reference statements)

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“…AlO-H stretching in the boehmite structure, respectively. [27][28][29] No obvious C-H bond stretches are observed. A minor absorption peak at 1164 cm -1 , as well as peaks at 1072, 868, and 772 cm -1 can be attributed to the deformation of interlayer AlO-H groups in boehmite.…”

Section: Infrared Spectroscopymentioning

confidence: 96%

“…A minor absorption peak at 1164 cm -1 , as well as peaks at 1072, 868, and 772 cm -1 can be attributed to the deformation of interlayer AlO-H groups in boehmite. [27][28][29] Octahedral Al-O stretching produces a peak at 608 cm -1 . 28,30 Overlapping peaks observed near 465 cm -1 correspond to skeletal modes of Al-O layers.…”

Section: Infrared Spectroscopymentioning

confidence: 99%

“…[27][28][29] Octahedral Al-O stretching produces a peak at 608 cm -1 . 28,30 Overlapping peaks observed near 465 cm -1 correspond to skeletal modes of Al-O layers. 28 NOTE: Figure 4 is included in this submission as a separate PowerPoint file.…”

Section: Infrared Spectroscopymentioning

confidence: 99%

“…28,30 Overlapping peaks observed near 465 cm -1 correspond to skeletal modes of Al-O layers. 28 NOTE: Figure 4 is included in this submission as a separate PowerPoint file. (Figure 4b).…”

Section: Infrared Spectroscopymentioning

confidence: 99%

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Epoxide-assisted alumina aerogels by rapid supercritical extraction

Juhl

Dunn

Carroll

et al. 2015

Journal of Non-Crystalline Solids

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Aerogels offer a potential alternative to noble metals that could reduce both the cost and environmental impact associated with catalytic converter production. The environmental impact of the production of aerogel catalysts could be further reduced by using a rapid supercritical extraction (RSCE) technique, which reduces the time and solvent waste associated with aerogel preparation. Alumina aerogels, which have shown activity in catalyzing exhaust processing reactions, were prepared using an epoxide-assisted gelation technique with RSCE processing in a contained mold in a hydraulic hot press. Samples were characterized by FTIR, XRD, SEM, EDX, nitrogen adsorption porosimetry and pycnometry. Solvent characterization by GC-MS headspace analysis shows that excess propylene oxide and chloropropanol products of an irreversible epoxide ring-opening reaction are present in the alumina gel following gelation, but can be removed via solvent exchange. Alumina aerogels with surface areas as high as 790 m 2 /g and bulk densities as low as 0.05 g/mL were prepared. Preliminary characterization of these aerogels, utilizing a catalytic test bed and a simulated emissions gas blend, demonstrates that they have moderate ability for removal of hydrocarbons, carbon monoxide and nitrogen oxide.

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Section: Infrared Spectroscopymentioning

confidence: 96%

Section: Infrared Spectroscopymentioning

confidence: 99%

Section: Infrared Spectroscopymentioning

confidence: 99%

“…28,30 Overlapping peaks observed near 465 cm -1 correspond to skeletal modes of Al-O layers. 28 NOTE: Figure 4 is included in this submission as a separate PowerPoint file. (Figure 4b).…”

Section: Infrared Spectroscopymentioning

confidence: 99%

See 2 more Smart Citations

Epoxide-assisted alumina aerogels by rapid supercritical extraction

Juhl

Dunn

Carroll

et al. 2015

Journal of Non-Crystalline Solids

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“…The sol−gel method, as one of the various synthesis methods, is the most promising technique because of its facile procedure and the highest purity materials, which can be achieved through this method. 24 Therefore, in this study, microcapsules of PA/(Al 2 O 3 ·xH 2 O) were synthesized via a sol−gel method and the thermal properties and morphologies of four different weight ratios of PA/aluminum isopropoxide (AIP) have been investigated. Finally, thermal cycling tests confirmed the applicability of the MEPCMs.…”

Section: - Introductionmentioning

confidence: 99%

Fabrication and Performances of Microencapsulated Palmitic Acid with Enhanced Thermal Properties

Latibari

Mehrali

et al. 2015

Energy Fuels

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This study focuses on the synthesis of microencapsulated phase change materials (MEPCMs), consisting of a palmitic acid (PA) core within an aluminum hydroxide oxide (Al 2 O 3 ·xH 2 O) shell, using a sol−gel method. Aluminum isopropoxide (AIP) was used as a precursor for the aluminum hydroxide oxide shell. The MEPCMs were synthesized using four different weight ratios of PA/AIP. The effects of the PA/AIP weight ratio on the encapsulation characteristics and thermal properties of the MEPCMs have been investigated. The microcapsules were spherically shaped with an average diameter of 1.689−3.730 μm. Encapsulated PA confirmed the outstanding phase-change performance with specific heat and thermal stability enhancement. The final results suggested that the weight ratio of PA/AIP has an important effect on the morphology, encapsulation efficiency, and durability of the MEPCMs. A higher weight ratio of AIP/PA led to a smaller diameter size with enhanced thermal conductivity, thermal effusivity, and thermal stability of the MEPCMs. The thermal conductivity of PA microcapsules was considerably increased because of the fabrication of a thermally conductive aluminum hydroxide oxide shell. It can be concluded that the prepared MEPCMs employ an excellent energy storage potential because of their ideal latent heat, high thermal conductivity, and thermal stability.

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High performance biopolymer blend nanocomposites derived from cashew gum/polyvinyl alcohol/boehmite for flexible electronic devices

Meera

Arun

Ramesan

2023

J of Applied Polymer Sci

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This work reports on a bio‐based polymer blend comprised of polyvinyl alcohol/cashew gum (PVA/CG) embedded with boehmite nanoparticles to tailor the structural, thermal, mechanical properties, and electrical response. The chemical bonding between boehmite and the PVA/CG blend was confirmed by FTIR. The XRD data showed that the nanocomposite films had distinct peaks of boehmite. The SEM images revealed uniformly dispersed morphology at 5 wt% boehmite. The elemental composition of blend nanocomposites was revealed by the EDX analysis. The thermal stability of the blend increases with increasing boehmite, whereas the glass transition temperature decreases. The highest AC conductivity was achieved for PVA/CG/7 wt% boehmite, which was 4.6 times greater than the pure blend. The frequency and temperature‐dependent dielectric constant, modulus and impedance of all films were examined in conjunction with different nanoparticle loadings. Tensile strength and hardness have improved with the addition of boehmite into the PVA/CG blend whereas the elongation at break slightly decreases. The PVA/CG blend had a tensile strength of 31.17 MPa, which increased to 44.66 MPa when 7 wt% boehmite was added. Therefore, eco‐friendly PVA/CG/boehmite films with good thermal stability, mechanical strength, dielectric constant, and conductivity could be a practical green substitute for flexible electronic, charge storage, and electrochemical devices.

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Sol–Gel Derived Boehmite as an Efficient and Robust Carrier for Enzyme Encapsulation

Cited by 18 publications

References 41 publications

Epoxide-assisted alumina aerogels by rapid supercritical extraction

Epoxide-assisted alumina aerogels by rapid supercritical extraction

Fabrication and Performances of Microencapsulated Palmitic Acid with Enhanced Thermal Properties

High performance biopolymer blend nanocomposites derived from cashew gum/polyvinyl alcohol/boehmite for flexible electronic devices

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