Optical and superhydrophilic properties of nanoporous silica-silica nanocomposite thin film

Aghaei, Reza; Eshaghi, Akbar

doi:10.1016/j.jallcom.2016.12.327

Cited by 52 publications

(21 citation statements)

References 25 publications

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“…5 that, distinct peaks of Si 2s and Si 2p are observed in SATEOS1 and SATEOS6 where microencapsulation with SiO 2 shell is occurred. The similar Si 2s peak at 155.1 eV has been reported by the previous researchers 54 . The presence of Si peaks in SATEOS1 ( Fig.…”

supporting

confidence: 90%

Microencapsulation of stearic acid with SiO2 shell as phase change material for potential energy storage

Ishak

Mandal

Lee

et al. 2020

Sci Rep

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Stearic acid (SA) is being used as phase change material (PCM) in energy storage applications. In the present study, the microencapsulation of SA with SiO2 shell was carried out by sol–gel method. Different amounts of SA (5, 10, 15, 20, 30 and 50 g) were taken against 10 ml of tetraethyl orthosilicate (TEOS) for encapsulation. The synthesized microencapsulated PCM (MEPCM) were characterized by Fourier transform infrared spectroscope (FT-IR), X-Ray diffraction (XRD), X-Ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The characterization results showed that SA was successfully encapsulated by SiO2. Thermogravimetric analysis (TGA) exhibited better thermal stability of the MEPCM than SA. The enthalpy values of MEPCM were found to be unchanged even after 30 heating–cooling cycles by differential scanning calorimetry (DSC). The latent heats of melting and solidification of 50 g SA containing MEPCM were found to be highest i.e. 182.53 J/g and 160.12 J/g, respectively among all microencapsulated samples. The encapsulation efficiency values were calculated using thermal data and the efficiency was found to be highest i.e. 86.68% in the same sample.

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supporting

confidence: 90%

Microencapsulation of stearic acid with SiO2 shell as phase change material for potential energy storage

Ishak

Mandal

Lee

et al. 2020

Sci Rep

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“…The inset displays a photograph of the separation process in the product from the photocatalyst reaction related to carbon on the surface originates from the surface adventitious carbon. While the presence of Si 2p and Si 2s centered on 103 and 133.08 eV associate with the binding energy of Si 4+ and O 2in silica [37], identified due to the thin coating of TiO 2 on the SiO 2 layer. Meanwhile, the elements of Fe, Ni, Cu, and Zn corresponding to the magnetic core NPs are also detected at 709, 886, 975, and 1021 eV regularly, for which both layers of TiO 2 and SiO 2 are still in the very thin coating.…”

Section: Discussion Of Experimental Resultsmentioning

confidence: 89%

Surface modification of magnetic TiO2 core-shell with doped cerium for enhancement of photocatalytic performance

Fachruddin

Susanto

Chen

et al. 2020

EEJET

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Структура ядро-оболонка легованого Ce TiO 2 @SiO 2 @(Ni-Cu-Zn) фериту, зазначеного як CTSF у виглядi композитних наночастинок (НЧ), була синтезована з використанням модифiкованого зольгель методу. Фiзико-хiмiчнi властивостi отриманих продуктiв були повнiстю охарактеризованi за допомогою рентгенiвської дифракцiї (РД), методу Брунауера-Еммета-Теллера (БЕТ), рентгенiвської фотоелектронної спектроскопiї (РФЕС) i надпровiдного квантового iнтерференцiйного пристрою (СКВIД). Тим часом оцiнювання фотокаталiтичної активностi каталiзатора проводили методом спектроскопiї у видимiй та ультрафiолетовiй областях (УФ-вид). Результати дослiдження показують, що анатазна фаза, пов'язана зi структурою TiO 2 , була побудована на зовнiшнiй оболонцi композитних НЧ. Однак другу фазу, пов'язану зi структурою Ce, було нелегко виявити на рентгенограмi, що пiдтвердило включення легованого Ce в кристалiчну структуру TiO 2. Мезопориста структура легованих Ce шарiв TiO 2 була продемонстрована за допомогою iзотерми типу IV i петлi гiстерезису типу H3. Був сформований однорiдний розмiр пор при питомiй площi поверхнi до 111,916 м 2 /г i 0,241 см 3 /г об'єму пор. Стехiометрiя хiмiчного складу, утвореного з меншою кiлькiстю дефектiв на поверхнi шарiв TiO 2 , продемонстрована кривою симетрiї пiкiв Ti 2p 3/2 та Ti 2p 1/2 РФЕС-спектрiв. Тим часом окислювально-вiдновна пара, що вiдповiдає Ce 3+ /Ce 4+ , була включена в тонке покриття TiO 2. Крiм того, каталiтичнi магнiтнi НЧ також можуть бути вiдокремленi з використанням зовнiшнього магнiтного поля вiд реакцiйної системи. Характеристики продукту, пов'язанi з ефективнiстю розкладання, досягли 50 % у водному розчинi метиленового синього (МС) Ключовi слова: магнiтний фотокаталiзатор, фотодеградацiя, легований церiєм TiO 2 , поверхнева модифiкацiя, фотокаталiтичнi характеристики UDC 621

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“…As a result, the XPS data show the presence of the atoms mentioned in the structure of the synthesized catalyst. [69] The net amount of palladium doped into the structure of the catalyst was determined by ICP-OES analysis. According to the result, 0.6 wt% Pd (0.0564 mmol g −1 ) was measured in the structure of Magnetite@MCM-41@NHC@Pd.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Magnetite@MCM‐41 nanoparticles as support material for Pd‐N‐heterocyclic carbene complex: A magnetically separable catalyst for Suzuki–Miyaura reaction

Akkoç

Buğday

Altın

et al. 2021

Applied Organom Chemis

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The Magnetite@MCM‐41@NHC@Pd catalyst was obtained with Pd metal bound to the NHC ligand anchored to the surface of Fe3O4@MCM‐41. It was characterized by Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), energy disperse X‐ray analysis (EDX), thermogravimetric analysis (TGA), differential thermal analysis (DTA), and scanning electron microscopy (SEM). The amount of Pd in the Magnetite@MCM‐41@NHC@Pd was measure by inductively coupled plasma–optical emission spectroscopy (ICP‐OES) analysis. The catalytic activity of Magnetite@MCM‐41@NHC@Pd heterogeneous catalyst done on Suzuki–Miyaura reactions of aryl halides with different substituted arylboronic acid derivatives. All coupling reactions afforded excellent yields and up to 408404 Turnover Frequency (TOF) h−1 in the presence of 2 mg of Magnetite@MCM‐41@NHC@Pd catalyst (0.0564 mmol g−1, 0.01127 mmol% Pd) at room temperature in 2‐propanol/H2O (1:2). Moreover, Magnetite@MCM‐41@NHC@Pd catalyst was recover by applying the magnet and reused for another reaction. The catalyst showed excellent structural and chemical stability and reused ten times without a substantial loss in its catalytic performance.

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Optical and superhydrophilic properties of nanoporous silica-silica nanocomposite thin film

Cited by 52 publications

References 25 publications

Microencapsulation of stearic acid with SiO2 shell as phase change material for potential energy storage

Microencapsulation of stearic acid with SiO2 shell as phase change material for potential energy storage

Surface modification of magnetic TiO2 core-shell with doped cerium for enhancement of photocatalytic performance

Magnetite@MCM‐41 nanoparticles as support material for Pd‐N‐heterocyclic carbene complex: A magnetically separable catalyst for Suzuki–Miyaura reaction

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