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Ditemukan 12339 dokumen yang sesuai dengan query
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Ramsden, Jeremy J.
"Applied nanotechnology takes an integrated approach to the scientific, commercial and social aspects of nanotechnology, exploring :
- The relationship between nanotechnology and innovation
- The changing economics and business models required to commercialize innovations in nanotechnology
- Product design case studies
- Applications in various sectors, including information technology, composite materials, energy, and agriculture
- The role of government in promoting nanotechnology
- The potential future of molecular self-assembly in industrial production
In this 2e, new chapters have been added on energy applications and the role of nanotechnology in sustainability. The section on the safety of nanoproducts has also been updated, and material on funding and commercialization has been updated and expanded, with new case studies illustrating the experience of new startups in a challenging economic environment.
"
Waltham, MA: Elsevier, 2014
e20426798
eBooks  Universitas Indonesia Library
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New York: CRC Press, 2008
620.5 FUN
Buku Teks SO  Universitas Indonesia Library
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Ramsden, Jeremy J.
Jakarta: Erlangga, 2011
620.5 RAM at (1)
Buku Teks SO  Universitas Indonesia Library
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Ghiska Ramahdita
"ABSTRAK
Berbagai penelitian mengenai teknologi nano terus difokuskan pada nanopartikel semikonduktor seng oksida (ZnO) dengan berbagai potensi strategis yang dimilikinya. Dalam penelitian ini telah dilakukan sintesis nanopartikel ZnO dengan teknik presipitasi yang dikombinasikan dengan perlakuan pra-hidrotermal dengan variasi waktu tahan 0, 24, 48 dan 72 jam yang secara khusus ditujukan untuk menginvestigasi pengaruh perlakuan tersebut terhadap ukuran nanopartikel, kristalinitas dan energi celah pita nanopartikel yang dihasilkan. Hasil penelitian menunjukkan bahwa meningkatnya waktu perlakuan pra-hidrotermal dari 0 hingga 72 jam mampu meningkatkan ukuran nanopartikel ZnO dari 3.47 menjadi 13.85 nm, serta menurunkan energi celah pita dari 3.099 menjadi 3.076 eV.

ABSTRACT
Many research on nanotechnology has been focused on zinc oxide (ZnO) semiconductor nanoparticles which has strategic potentials. In the current research the synthesis of ZnO nanoparticles has been performed, using a precipitation technique assisted by a pre-hydrothermal treatment with various holding time of 0, 24, 48 and72 hours. This route was specifically aimed at investigating the effect of this treatment on the nanocrystallite size, crystallinity and band gap energy of the resulting nanoparticles. The result of investigation showed that an increasing of pre-hydrothermal treatment duration from 0 to 72 hours has increased the crystallite size of ZnO nanoparticles from 3.47 to 13.85 nm, and decreased the band gap energy from 3.099 to 3.076 eV."
Depok: Fakultas Teknik Universitas Indonesia, 2011
S691
UI - Skripsi Open  Universitas Indonesia Library
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Harsono
"Titania nanotube dengan dopan karbon (C-TiNT) telah berhasil disentesis dan diuji untuk degradasi fenol. Sintesis dilakukan dengan dua tahap yaitu pembentukan titania nanotube dengan metode hydrothermal dan pemberian dopan karbon pada fotokatalis TiO2 nanotube. Pemberian dopan karbon dilakukan dengan dua metode post treatment yaitu kalsinasi dan hydrothermal. Selain itu, juga dilakukan variasi jenis sumber dopan karbon yaitu glukosa dan 1-propanol. Karakterisasi dilakukan dengan menggunakan analisis SEM-EDS, XRD, dan DRS.
Hasil SEM menunjukkan hasil morfologi nanotube telah terbentuk dan terdapat dopan karbon didalamnya. Analisis XRD menunjukkan pada semua katalis terbentuk kristal anatase 100% dengan ukuran kristal 7 - 10 nm. Karakterisasi DRS menunjukkan bahwa katalis nanotube dengan dopan karbon memberikan respon yang baik pada panjang gelombang cahaya tampak dengan nilai band gap 3,0 eV hingga 3,20 eV. Hasil pengujian terhadap fenol menunjukkan katalis C-TiNT mampu mendegradasi fenol dengan kinerja 60% hingga 80%. Nilai ini jauh lebih baik dibandingkan dengan TiO2 nanopartikel yang hanya mampu mendegradasi fenol dengan kinerja sebesar 33%.

A variety of carbon doped on titania nanotube (C-TiNT) have already syntesied well as investigeted for phenol degradation. Synthesis has been conducted in two steps. First step was synthesis of titania nanotube by using hydrothermal method. Second step was incorporated carbon doped to the photocatalyst TiO2 nanotube. Carbon doped was also given by using two methods of post treatment. They are calcination and hydrothermal methods. In addition, we also examined two carbon sources of dopan. They are glucose and 1-Propanol. The prepared samples were characterized with SEM-EDS, XRD, and DRS.
The SEM result showed that nanotube morphology was already exist and contained with carbon. XRD analysis showed existence of anatase crystalline phase reached 100%, and size of crystal was around 7-10nm. DRS result showed good response to visible light range (λ > 400nm) which has band gap value at 3,0 eV-3,20 eV. The results of phenol degradation showed those photocatalyst have performance in range 60% - 80%.This result is much better compared to TiO2 nanoparticle which only degradated 33% of phenol.
"
Depok: Fakultas Teknik Universitas Indonesia, 2013
S44409
UI - Skripsi Membership  Universitas Indonesia Library
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"This book presents the fabrication of optoelectronic nanodevices. The structures considered are nanowires, nanorods, hybrid semiconductor nanostructures, wide bandgap nanostructures for visible light emitters and graphene. The device applications of these structures are broadly explained. The book deals also with the characterization of semiconductor nanostructures. "
Berlin: Springer, 2012
e20406047
eBooks  Universitas Indonesia Library
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Lintannisa Rahmatia
"Sintesis dan Aplikasi Nanokomposit Berbasis Selulosa Corn Cob - TiO2/ZnO sebagai Katalis pada Konversi Glukosa Menjadi 5-Hidroksimetilfurfural dan Asam Levuinat Selulosa dapat diisolasi dari limbah corn cob tongkol jagung yang akan digunakan untuk sintesis nanokomposit berbasis selulosa yang dimodifikasi dengan nanopartikel anorganik TiO2/ZnO sehingga memiliki sifat unggul yang berasal dari gabungan sifat keduanya. Metode yang digunakan untuk isolasi selulosa adalah perlakuan alkali dan hidrolisis asam. Hasil isolasi dan sintesis tersebut dikarakterisasi dengan menggunakan instrumen FTIR, XRD, TEM dan SEM. Rendemen selulosa hasil isolasi diperoleh sebesar 57,51. TiO2 dan ZnO hasil sintesis berukuran nano dengan struktur masing-masing berupa anatase dan heksagonal wurtzite. Nanokomposit selulosa ndash; TiO2/ZnO dapat diaplikasikan sebagai katalis pada konversi glukosa menjadi 5-Hidroksimetilfurfural dan produk sampingnya yaitu asam levulinat dengan uji kuantitatif nya menggunakan HPLC. Kondisi optimum pembentukan 5-Hidroksimetilfurfural dari konversi glukosa adalah pada suhu 180oC selama 210 menit, dengan komposisi glukosa sebanyak 30 mg dan katalis 15 mg. Laju reaksi konversi glukosa menjadi 5-hidroksimetilfurfural mengikuti reaksi orde 1 dengan energi aktivasi yang diperoleh dengan perhitungan Arhenius adalah sebesar 37,61 kJ/mol untuk reaksi penguraian glukosa menjadi produk, 29,28 kJ/mol untuk reaksi pembentukan HMF dan 22,12 kJ/mol untuk reaksi pembentukan LA,

Synthesis and Application Nanocomposite Based Corn Cob Cellulose TiO2 ZnO as Catalyst in Glucose Conversion to 5 Hydroxymethylefurfural and Levulinic Acid Cellulose can be isolated from corn cob waste to be used for the synthesis of cellulose based nanocomposites modified with inorganic TiO2 ZnO nanoparticles so as to have superior properties derived from their combined properties. The methods used for cellulosic isolation are alkaline treatment and acid hydrolysis. The isolation and synthesis results were characterized using FTIR, XRD, TEM and SEM instruments. The yield of isolated cellulose was obtained at 57,51. TiO2 and ZnO of nano sized synthesis with their respective structures in the form of anatase and hexagonal wurtzite. Nanocomposite cellulose TiO2 ZnO can be applied as a catalyst on conversion of glucose to 5 Hydroxymethylfurfural and its byproducts of levulinic acid with its quantitative test using HPLC. The optimum conditions of 5 Hydroxymethylfurfural formation of glucose conversion were at 180 C for 210 min, with a glucose composition of 30 mg and a catalyst of 15 mg. The rate of glucose conversion reaction to 5 hydroxymethylfurfural follows the reaction of order 1 with the activation energy obtained by Arhenius calculation is 37.61 kJ mol for the decomposition reaction of glucose into product, 29.28 kJ mol for HMF forming reaction and 22.12 kJ mol for LA forming reaction."
Depok: Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2018
T49887
UI - Tesis Membership  Universitas Indonesia Library
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Dickerson, James H., editor
"This book provides a comprehensive overview of contemporary basic research, emerging technology, and commercial and industrial applications associated with the electrophoretic deposition of nanomaterials. This presentation of the subject includes an historical survey, the underlying theory of electrophoresis, dielectrophoresis, and the colloidal deposition of materials. This is followed by an assessment of the experimental equipment and procedures for electrophoretic and dielectrophoretic aggregation, manipulation, and deposition of nanoparticles, nanotubes, and other nanomaterials. Additional chapters explore the specific science and technology of electrophoretic film formation, using widely studied and application-driven nanomaterials, such as carbon nanotubes, luminescent nanocrystals, and nano-ceramics. The concluding chapters explore industrial applications and procedures associated with electrophoretic deposition of nanomaterials.
"
New York: Springer, 2012
e20405851
eBooks  Universitas Indonesia Library
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Muhammad Fariz Mulyantono
"ABSTRAK
Isu pemanasan global semakin hari semakin menjadi perbincangan karena efeknya yang sangat merugikan bagi manusia, salah satu penyebab pemanasan global adalah kadar CO2 yang saangat tinggi dilingkungan. Jalur fotokatalitik untuk mengkonversi karbon dioksida CO2 merupakan cara untuk mengurangi krisis energi dan isu emisi CO2. Katalis yang paling banyak digunakan untuk reaksi fotokatalitik adalah titanium dioksida TiO2 karena ketersediaannya, stabilitas kimia, biaya rendah dan tahan terhadap korosi. Meskipun fotokatalis TiO2mempunyai kelemahan karena celah pita lebar hanya dapat diaktifkan pada iradiasi sinar ultraviolet dan tingkat rekombinasi elektron yang tinggi, tetapi tetap merupakan prekursor untuk pengembangan bahan responsif cahaya tampak untuk reduksi HCOO-. Ada peningkatan signifikan dalam konversi HCOO- dengan menggunakan katalis TiO2yang diintergrasi dengan Au karena adanya efek resonansi Plasmon permukaan. Dalam studi ini, konversi HCOO- dilakukan dengan reactor yang sudah berisi NaHCO3- dan Gliserol dengan katalis TiO2, nanokomposit Au-TiO2, dan Au@TiO2 coreshell yang dilakukan dengan variasi watu penerangan 4, 8, 12, dan 24 jam dengan rate 1mg katalis/mL yang hasil akhirnya akan diukur dengan High Pressure Liquid Chromatography HPLC untuk mengetahui produk hasill konversi HCOO-.

ABSTRACT
The issue of global warming is becoming a conversation nowadays, because the effect is very detrimental to humans, one the causes is the high content of CO2 in the environment. To reduce the energy crisis and the issue of CO2 emissions, photocatalytic pathaway was carried out. The most widely used catalyst for this pathway reactions is titanium dioxide TiO2 . Although TiO2 photocatalysts have weaknesses due to band gap can only be activated on ultraviolet light irradiation and high electron recombination rates, it is still remain a precursor for the development of visible light responsive materials for HCOO reduction. There was a significant increase in HCOO conversion by using TiO2 catalysts that were integrated with Au due to the surface Plasmon resonance effect. In this study, HCOO conversion was performed with reactors containing NaHCO3 and Glycerol with TiO2 catalyst, Au TiO2, and Au TiO2 coreshell nanocomposites performed with variations of 4, 8, 12, and 24 hours lighting, with 1mg catalyst mL which the result will be measured with High Pressure Liquid Chromatography HPLC to know the HCOO conversion product."
2018
S-Pdf
UI - Skripsi Membership  Universitas Indonesia Library
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"This book about first-principles-based multiscale, multiparadigm molecular mechanics and dynamics methods for describing complex chemical processes, dynamic QM/MM : a hybrid approach to simulating gas–liquid interactions, multiscale modelling in computational heterogeneous catalysis, real-world predictions from Ab initio molecular dynamics simulations, nanoscale wetting under electric field from molecular simulations, molecular simulations of retention in chromatographic systems : use of biased Monte Carlo techniques to access multiple time and length scales, thermodynamic properties for applications in chemical industry via classical force fields, multiscale approaches and perspectives to modeling aqueous electrolytes and polyelectrolytes, and coarse-grained modeling for macromolecular chemistry."
Berlin: Springer, 2012
e20405940
eBooks  Universitas Indonesia Library
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