Bundled-firewood like AlOOH-CaCl 2 nanocomposite desiccant

Rajamani, Manju; Mishra, Varun Raje; Maliyekkal, Shihabudheen M.

doi:10.1016/j.cej.2017.04.084

Cited by 15 publications

(4 citation statements)

References 49 publications

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“…21-1276 and 74-0992). 18,19 After CaCl 2(s) was removed by washing the solid product with deionized (DI) water, pure rutile TiO 2(s) (P973) was isolated. P973 and other samples investigated are summarized in Table S1 in the Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

“…As shown by the X-ray diffraction (XRD) pattern in Figure S1b, the product was identified to be rutile TiO 2(s) embedded in a matrix of CaCl 2(s) (Joint Committee of Powder Diffraction Standard, JCPDS no. 21-1276 and 74-0992). , After CaCl 2(s) was removed by washing the solid product with deionized (DI) water, pure rutile TiO 2(s) (P973) was isolated. P973 and other samples investigated are summarized in Table S1 in the Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

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Vapor–Solid Reaction Growth of Rutile TiO₂ Nanorods and Nanowires for Li-Ion-Battery Electrodes

Lee

Chiu

2019

ACS Omega

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A new synthetic method to grow O-deficient rutile TiO2(s) nanorods (NRs) and nanowires (NWs) by a vapor–solid reaction growth method is developed. TiCl4(g) was employed to react with commercially supplied CaTiO3(s) (size 2–4 μm) at 973 K under atmospheric pressure to generate TiO2(s) NRs (diameters 80–120 nm, lengths 1–4 μm). The reaction employing TiCl4(g) and CaO(s) at 973 K also generated CaTiO3(s) (size 4–13 μm) as the intermediate which reacted further with TiCl4(g) to produce NWs (diameters 80–120 nm, lengths 4–15 μm). This is the first report of 1D rutile TiO2(s) nanostructure with such a high aspect ratio. Both of the NRs and the NWs, with compositions TiO1.81 and TiO1.65, respectively, were single crystals grown in the [001] direction. Their morphology was affected by the reaction temperature, the concentration of TiCl4(g), and the particle size of CaTiO3(s). The NRs and the NWs were investigated as anode materials for Li+-ion batteries. At constant current rates 1, 2, and 5 C (1 C = 170 mA g–1) for 100 cycles, the cycling (1.0–3.0 V) performance data of the NRs were 146, 123, and 104 mA h g–1, respectively. On the other hand, the cycling performance data of the NWs were 120, 80, and 52 mA h g–1, respectively. This is attributed to the high Li+ ion diffusion rate (DLi+) of the NRs (29.52 × 10–15 cm2 s–1), which exceeds that of the NWs (8.61 × 10–15 cm2 s–1). Although the [001] growth direction of the NR crystals would provide the fastest channels for the diffusion of Li+ ions and enhance the battery capacity, the extremely long channels in the NWs could hamper the diffusion of the Li+ ions. The O-deficiency in the structure would increase the conductivity of the electrode material and improve the stable cycling stability of the batteries also. The long-term cycling test at 2 C for the battery constructed from the NRs retained 121 mA h g–1 after 200 cycles and 99.2 mA h g–1 after 800 cycles. The device has an excellent long-term cycling stability with a loss of only 0.04% per cycle.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Vapor–Solid Reaction Growth of Rutile TiO₂ Nanorods and Nanowires for Li-Ion-Battery Electrodes

Lee

Chiu

2019

ACS Omega

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“…The peak intensity increased with increasing the amount of Al added to the samples. The peak attributed to the Al pillar at ∼74.6 eV was observed for all samples, indicating the existence of the AlOOH species. , The peak analysis of XPS spectra were shown in Figure S2. The Al 2p spectra were split into Al–Cl (75.1 eV) and Al–OH (74.2 eV), and each of these signifies the content of AlOCl and AlOOH, respectively.…”

Section: Introductionmentioning

confidence: 90%

“…The peak attributed to the Al pillar at ∼74.6 eV was observed for all samples, indicating the existence of the AlOOH species. 31,32 The peak analysis of XPS spectra were shown in wavelength range (300−500 cm −1 ) were observed, suggesting a uniform distribution of Al-containing nanoparticles between rGO sheets. 33 The extent of the GO reduction in the analyzed samples was determined using XPS (Figures 3c and S4) and Raman spectroscopy (Figures 3d and S3).…”

Section: ■ Introductionmentioning

confidence: 96%

Super-Expansion of Assembled Reduced Graphene Oxide Interlayers by Segregation of Al Nanoparticle Pillars for High-Capacity Na-Ion Battery Anodes

Pyo

Eom

Kim

et al. 2020

ACS Appl. Mater. Interfaces

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The applicability of Na-ion batteries is contingent on breakthroughs in alternative electrode materials that have high capacities and which are economically viable. Unfortunately, conventional graphite anodes for Li-ion battery systems do not allow Na-ion accommodation into their interlayer space owing to the large ionic radius and low stabilizing energy of Na in graphite. Here, we suggest a promising strategy for significantly increasing Na capacity by expanding the axial slab space of graphite. We successfully synthesized reconstructed graphite materials via self-assembly of negative graphite oxide (GO) flakes and Al cation (positive) pillars and by subsequent chemical reaction of the obtained Al-GO materials. Al pillars, atomically distributed in graphite interlayers, can extend the slab space by up to ∼7 Å, which is a 2-fold interlayer distance of pristine graphite. An exceptionally high capacity of 780 mAh/g is demonstrated for reconstructed graphite anodes with Al pillars, compared with rGO materials (210 mAh/g). We investigated the electrochemical reaction mechanism and structural changes associated with discharge and charge to emphasize the benefit of using reconstructed graphite as anodes in Na-ion batteries. Our strategy of modifying the interlayer distance by introducing metallic pillars between the layers can help address the low capacity of carbonaceous anodes.

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Recent Advances in Desiccant Materials for Energy‐Efficient and Sustainable Heat Transfer Systems

Senthilkumar,

Sundarrajan,

Ramasubramanian

et al. 2024

Energy Tech

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The expanding prevalence of heating, ventilation, and air conditioning (HVAC) systems, currently reliant on fossil fuel‐derived energy, necessitates energy‐saving measures to address climate change concerns. Implementing desiccants with high water vapor affinity reduces latent heat input, impacting the heat exchanger's functionality based on system and desiccant characteristics. This review analyzes the materials in solid desiccants, binders, and substrates, emphasizing advancements for enhanced heat transfer efficiency. Some notable materials explored include metal–organic frameworks, activated carbon, silica gel, polymers, and zeolite. In system level, the article discusses about the dual‐channel heat exchanger which emerges as a solution to drawbacks in existing dehumidification systems, offering higher performance and lower latent heat load in modern solid desiccant‐coated heat exchangers. Despite the environmental impact of material usage, future research should focus on sustainable materials, such as those derived from biomass or recycled sources, to maintain efficiency while minimizing waste in HVAC systems.

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Bundled-firewood like AlOOH-CaCl 2 nanocomposite desiccant

Cited by 15 publications

References 49 publications

Vapor–Solid Reaction Growth of Rutile TiO₂ Nanorods and Nanowires for Li-Ion-Battery Electrodes

Vapor–Solid Reaction Growth of Rutile TiO₂ Nanorods and Nanowires for Li-Ion-Battery Electrodes

Super-Expansion of Assembled Reduced Graphene Oxide Interlayers by Segregation of Al Nanoparticle Pillars for High-Capacity Na-Ion Battery Anodes

Recent Advances in Desiccant Materials for Energy‐Efficient and Sustainable Heat Transfer Systems

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Bundled-firewood like AlOOH-CaCl 2 nanocomposite desiccant

Cited by 15 publications

References 49 publications

Vapor–Solid Reaction Growth of Rutile TiO2 Nanorods and Nanowires for Li-Ion-Battery Electrodes

Vapor–Solid Reaction Growth of Rutile TiO2 Nanorods and Nanowires for Li-Ion-Battery Electrodes

Super-Expansion of Assembled Reduced Graphene Oxide Interlayers by Segregation of Al Nanoparticle Pillars for High-Capacity Na-Ion Battery Anodes

Recent Advances in Desiccant Materials for Energy‐Efficient and Sustainable Heat Transfer Systems

Contact Info

Product

Resources

About

Vapor–Solid Reaction Growth of Rutile TiO₂ Nanorods and Nanowires for Li-Ion-Battery Electrodes

Vapor–Solid Reaction Growth of Rutile TiO₂ Nanorods and Nanowires for Li-Ion-Battery Electrodes