Preparation and Application of Mesoporous Nanotitania Photocatalysts Using Different Templates and pH Media

Abdel-Azim, Samira M.; Aboul-Gheit, Ahmed K.; Ahmed, Sahar M.; El-Desouki, Doaa S.; Abdel‐Mottaleb, M. S. A.

doi:10.1155/2014/687597

Cited by 20 publications

(17 citation statements)

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“…Isoterm tipe IV ini diidentikkan dengan bahan berkarakter mesoporos dengan bentuk hysteresis loops tipe H3 dengan sifat adsorpsi tidak terbatas pada P/Po tinggi. Bahan berkarakter mesoporos ditandai dengan terjadinya pelebaran kurva hysteresis karena mengalami kondensasi kapilar dalam sistem mesopori [20]. Kemungkinan lain bentuk kurva hysteresis seperti tipe H3 ini adanya agregasi partikel berbentuk lembaran pada bahan [19].…”

Section: Ujiadsorpsiunclassified

ANALISIS STRUKTUR DAN POROSITAS KOMPSOSIT Fe3O4-KARBON AKTIF DARI LIMBAH KERTAS SEBAGAI ADSORBEN MAGNETIK

Fisli

Safitri

Nurhasni

et al. 2018

jsmi

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ANALISIS STRUKTUR DAN POROSITAS KOMPOSIT Fe 3 O 4-KARBON AKTIF DARI LIMBAH KERTAS SEBAGAI ADSORBEN MAGNETIK. Komposit partikel magnet-karbon aktif dari limbah kertas telah berhasil dibuat. Karbon aktif dibuat dengan cara bahan kertas bekas dibakar dan selanjutnya direndam dalam asam kuat. Komposit Fe 3 O 4-karbon aktif dibuat dengan mencampurkan garam besi Fe 3+ /Fe 2+ (rasio mol 2 : 1) dengan suspensi karbon aktif dalam air. Larutan campuran garam besi-karbon aktif ditambahkan larutan NaOH tetes demi tetes pada kondisi suhu 70 o C. Analisis struktur, morfologi, ikatan kimia, sifat magnet dan porositas diselidiki dengan berbagai alat, berturut-turut menggunakan alat XRD, SEM, FTIR, VSM dan adsorpsi-desorpsi N 2 Quantasorb. Hasil karakterisasi menunjukkan bahwa nanopartikel Fe 3 O 4 telah berhasil tercangkok pada struktur karbon melalui interaksi gugus hidroksil. Bahan komposit mempunyai sifat magnetik berkelakuan superparamagnetik. Keberadaan nanopartikel Fe 3 O 4 pada struktur karbon membentuk sistem mesopori baru, dimana volume pori meningkat dari 0,07 cc/g menjadi 0,464 cc/g (meningkat 6 kali untuk karbon tanpa aktivasi dan meningkat dari 0,1053 cc/g menjadi 0,525 cc/g (meningkat 5 kali) untuk karbon aktivasi dengan sebaran ukuran pori rata-rata 17,5 nm. Hasil uji adsorpsi menunjukkan bahwa senyawa fenol dan metil jingga hanya mampu diserap 30% dalam larutan air, tetapi untuk senyawa metilen biru mampu diserap 96,3 % pada kondisi yang sama. Bahan komposit partikel magnet Fe 3 O 4 /karbon aktif limbah kertas dapat digunakan sebagai bahan alternatif menghilangkan zat warna metilena biru dalam limbah cair.

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Section: Ujiadsorpsiunclassified

ANALISIS STRUKTUR DAN POROSITAS KOMPSOSIT Fe3O4-KARBON AKTIF DARI LIMBAH KERTAS SEBAGAI ADSORBEN MAGNETIK

Fisli

Safitri

Nurhasni

et al. 2018

jsmi

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“…The precipitate was washed with water and acetone to remove the unreacted materials and organic impurities. The precursor was dried in an electric oven at 110 o C. The dried product was then crushed and calcined at 200 o C for 3 hrs [44].…”

Section: Preparation Of Nano Metal Oxidesmentioning

confidence: 99%

Physicomechanical Properties of Nano Polystyrene Nanocomposites

2017

Egypt. J. Chem.

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REPARAT ION of nano metal oxides (Fe2O3, ZnO and T iO2) and nano …… sphere polystyrene (PS) has been done in micellar solution. Nanocomposite films have been prepared by doping nano polystyrene with different ratios of nano metal oxide ranged from 0.25 up to 3 wt%. T hese nanocomposites were characterized using transmission electron microscopy (T EM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT IR).Thermo gravimetric analysis (T GA) and mechanical properties have also been investigated. By comparison with the values obtained for the PS, it was observed that the thermal stability is higher for the nanocompoistes and increases with increasing the nano metal oxides concentration in these samples. T he results indicate that the tensile strength, elongation at break and Young's modulus of all the nanocomposites enhanced with the addition of metal oxides nanoparticles compared with the pure PS.

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“…Among the methodologies of synthesis, the methods of sol-gel and homogeneous precipitation best favor the control of morphology [58,72,73]. The term sol-gel involves several synthetic methodologies based on hydrolytic processes [19,20,59,74].…”

Section: Synthesis Of Mesoporous Tiomentioning

confidence: 99%

“…Nanometric structures of mesoporous TiO 2 were produced using the sol-gel methodology, under acidic (pH 3 to 4) and alkaline (pH 7 to 9) media, using cetyl trimethyl ammonium bromide (CTAB), sodium dodecyl benzenesulphonate (DBS) and nonylphenol ethoxylate as surfactants (NPE) [72]. The effect of the surfactant and pH on morphology, particle size, surface area, and pore size distribution was studied being the synthesized oxides evaluated considering the degradation of naphthalene.…”

Section: Synthesis Of Mesoporous Tiomentioning

confidence: 99%

“…In 1990, scientists from Mobil Oil Corporation[83], reported obtaining of mesoporous silicate molecular sieves, denoted by M41s, synthesized using a supramolecule-templating process, giving rise to a new and fascinating research field. Subsequently, efforts have been concentrated in studies related to synthesis and applications of mesoporous materials[9,72,[84][85][86][87][88][89][90][91].…”

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Applications of Mesoporous Ordered Semiconductor Materials — Case Study of TiO2

Machado¹,

Borges²,

Silva³

et al. 2015

Solar Radiation Applications

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Additional information is available at the end of the chapter http://dx.doi.org/10.5772/59602 . Introduction . . Titanium dioxide TiOTiO is a promisinμ material λor technoloμical applications λor its versatility [ -], abundance, low toxicity, μood chemical stability, photosensitivity and photostability [ -]. In nature, it is λound mainly in the mineral ilmenite [ ], that can be processed industrially by two diλλerent routes [ ] The λirst, involves the reaction oλ the concentrate oλ ilmenite with hot sulphuric acid, resultinμ in the λormation oλ sulphates oλ titanium, Fe II and Fe III , beinμ these last eliminated by centriλuμation, aλter coolinμ. The λinal solution is then puriλied and hydrolyzed to produce pure TiO [ ]. The other usual way oλ obtaininμ consists in combininμ the ore with coke and μaseous chlorine under heatinμ, resultinμ in CO and a sponμy material rich in TiCl . The reaction product is subjected to successive λractional distillation, with the λormation oλ TiCl and TiCl , due to stability oλ titanium in other deμrees oλ oxidation. The diλλerent precursors oλ titanium are hydrolyzed, λorminμ titanium dioxide [ ]. In, [ ], obtained, λor the λirst time, success in decomposition oλ water under irradiation with liμht and without application oλ any electric potential. They reported that, in trials where they employed n-type TiO as anode and Platinum as cathode, when TiO electrode illuminated under short-circuit conditions, hydroμen evolved λrom the Platinum electrode, while oxyμen evolved λrom the anode. Since then, studies aimed at discoverinμ and explorinμ diλλerent possibilities oλ technoloμical application λor TiO have been μiven μreat importance [ -].© 2015 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and eproduction in any medium, provided the original work is properly cited.As technoloμical applications λor TiO can be cited its use in ultraviolet radiation absorbinμ λilters [ , ], in chemical sensors λor μases [ -], as a bactericide [ ], in biomaterials λor bone implants [ ], in environmental photocatalysis [ , , , ], in the photocatalytic hydroμen evolution [ , -], in dye-sensitized solar cells [ , -], amonμ other.The photocatalytic eλλiciency oλ TiO depends on its structural and morpholoμical characteristics, which are related to the method oλ synthesis used in the preparation oλ nanoparticles [ , , , ]. To be photoactive, λavorinμ the photocatalysis process, besides beinμ mainly consistinμ oλ anatase crystalline phase, the TiO must possess hiμh speciλic surλace area, μood porosity, with hiμh sized pores [ , , ]. In this context, the search λor TiO particles that have diλλerentiated λeatures, with catalytic properties potentiated, constitutes a λield oλ intense activity [ , , -]. . Porosity and porous materialsThe porosity, related to the presence oλ cavities, channels or interstices is oλ μreat importance since it is related t...

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Preparation and Application of Mesoporous Nanotitania Photocatalysts Using Different Templates and pH Media

Cited by 20 publications

References 43 publications

ANALISIS STRUKTUR DAN POROSITAS KOMPSOSIT Fe3O4-KARBON AKTIF DARI LIMBAH KERTAS SEBAGAI ADSORBEN MAGNETIK

ANALISIS STRUKTUR DAN POROSITAS KOMPSOSIT Fe3O4-KARBON AKTIF DARI LIMBAH KERTAS SEBAGAI ADSORBEN MAGNETIK

Physicomechanical Properties of Nano Polystyrene Nanocomposites

Applications of Mesoporous Ordered Semiconductor Materials — Case Study of TiO2

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