Synthesis of metal oxide–based nanocomposites for energy storage application

Yaqoob, Asim Ali; Ahmad, Akil; Ibrahim, Mohamad Nasir Mohd; Karri, Rama Rao; Rashid, Mohd; Ahmad, Zahoor

doi:10.1016/b978-0-12-824547-7.00028-x

Cited by 7 publications

(3 citation statements)

References 72 publications

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“…As in many other environmental and energy applications, titanium dioxide has been the photocatalyst more widely used for the conversion of CO 2 to fuel, mainly due to its photoactivity, high stability, low cost, and safety [ 3 , 4 ]. However, its application is limited because of its relative wide band gap (3–3.2 eV) and rapid recombination rate of photo-induced electron-hole pairs [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Reduction of CO2 with N-Doped TiO2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis

et al. 2022

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The objective of this work was to analyze the effect of carbon support on the activity and selectivity of N-doped TiO2 nanoparticles. Thus, N-doped TiO2 and two types of composites, N-doped TiO2/CNT and N-doped TiO2/rGO, were prepared by a new environmentally friendly one-pot method. CNT and rGO were used as supports, triethylamine and urea as N doping agents, and titanium (IV) tetraisopropoxide and ethanol as Ti precursor and hydrolysis agent, respectively. The as-prepared photocatalysts exhibited enhanced photocatalytic performance compared to TiO2 P25 commercial catalyst during the photoreduction of CO2 with water vapor. It was imputed to the synergistic effect of N doping (reduction of semiconductor band gap energy) and carbon support (enlarging e−-h+ recombination time). The activity and selectivity of catalysts varied depending on the investigated material. Thus, whereas N-doped TiO2 nanoparticles led to a gaseous mixture, where CH4 formed the majority compared to CO, N-doped TiO2/CNT and N-doped TiO2/rGO composites almost exclusively generated CO. Regarding the activity of the catalysts, the highest production rates of CO (8 µmol/gTiO2/h) and CH4 (4 µmol/gTiO2/h) were achieved with composite N1/TiO2/rGO and N1/TiO2 nanoparticles, respectively, where superscript represents the ratio mg N/g TiO2. These rates are four times and almost forty times higher than the CO and CH4 production rates observed with commercial TiO2 P25.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic Reduction of CO2 with N-Doped TiO2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis

et al. 2022

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“…Chemical and biological methods require the utilization of excess toxic reactants that must be removed for biological purposes [16]. On the other hand, physical methods are generally less complicated, yield highly puri ed nanoparticles without toxic reactants, and typically require inexpensive equipment and less technical expertise [17]. Several physical methods, including laser ablation, laser pyrolysis, and electro-spraying, have been employed for the synthesis of AgNPs [15].…”

Section: Introductionmentioning

confidence: 99%

A combined experimental and computational analysis of dexamethasone-conjugated silver nanoparticles for improved surface-enhanced Raman substrate detection.

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Birech

Juma

et al. 2023

Preprint

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Computations based on density functional theory (DFT) and experimental analysis on spectral vibrations have been performed on the dexamethasone molecule. The computer simulations have been analyzed using DFT-B3LYP functional at 6-311 + + G(d,p) basis. UV-Vis and Raman spectra have been recorded and reported. High-purity silver granules (99.99%) were immersed in 5 ml of distilled water in a 25 ml glass beaker. A Q-Switched Nd: YAG laser (1064 nm, max energy of 250 mJ, 8 ns) was focused on the silver sample target by a convex lens whose focal length was 30mm. The ablation time varied from 2 to 8 hours leading to the formation of yellow to dark brown AgNPs colloids. Raman spectroscopy, UV-Vis spectroscopy, and Scanning Electron Microscopy techniques were used for the sample characterization. At 8 hours, the synthesized AgNPs were most chemically stable and had spherical colloids with a diameter of 6.3 nm. Conjugating dexamethasone with AgNPs led to the enhancement of the Raman signals by a factor of 1.4. A position shift in the plasmon resonance peak attributed to the newly formed complex with unique optical characteristics was noted. The findings support the possibility of enhancing the functionality of dexamethasone by developing new-drug-like candidates after conjugation with AgNPs.

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“…The fast development of societies has induced increasing energy demand, making limited fossil fuels unable to meet the needs of development. Therefore, the utilization of sustainable and renewable energy is needed to improve energy utilization efficiency [ 1 , 2 ]. Thermal energy storage technology can store and release heat when the phase change procedure occurs [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Cadmium Sulfide—Reinforced Double-Shell Microencapsulated Phase Change Materials for Advanced Thermal Energy Storage

et al. 2022

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Phase change materials (PCMs) are widely used to improve energy utilization efficiency due to their high energy storage capacity. In this study, double-shell microencapsulated PCMs were constructed to resolve the liquid leakage issue and low thermal conductivity of organic PCMs, which also possess high thermal stability and multifunctionality. We used assembly to construct an inorganic–organic double shell for microencapsulate PCMs, which possessed the unprecedented synergetic properties of a cadmium sulfide (CdS) shell and melamine–formaldehyde polymeric shell. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images confirmed the well-designed double-shell structure of the microcapsules, and the CdS was successfully assembled as the second shell on the surface of the polymer shell. The differential scanning calorimeter (DSC) showed that the double-shell microcapsules had a high enthalpy of 114.58 J/g, which indicated almost no changes after experiencing 100 thermal cycles, indicating good thermal reliability. The microcapsules also showed good shape stability and antileakage performance, which displayed no shape change and leakage after heating at 60 °C for 30 min. In addition, the photothermal conversion efficiency of the double-shell microcapsules reached 91.3%. Thus, this study may promote the development of microencapsulated PCMs with multifunctionality, offering considerable application prospects in intelligent temperature management for smart textiles and wearable electronic devices in combination with their solar thermal energy conversion and storage performance.

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Synthesis of metal oxide–based nanocomposites for energy storage application

Cited by 7 publications

References 72 publications

Photocatalytic Reduction of CO2 with N-Doped TiO2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis

Photocatalytic Reduction of CO2 with N-Doped TiO2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis

A combined experimental and computational analysis of dexamethasone-conjugated silver nanoparticles for improved surface-enhanced Raman substrate detection.

Cadmium Sulfide—Reinforced Double-Shell Microencapsulated Phase Change Materials for Advanced Thermal Energy Storage

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