Controlled growth of zinc oxide microrods by hydrothermal process on porous ceramic supports for catalytic application

Danwittayakul, Supamas; Dutta, Joydeep

doi:10.1016/j.jallcom.2013.10.019

Cited by 23 publications

(5 citation statements)

References 47 publications

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“…[1][2][3][4][5][6][7] Comparatively few efforts have focusedo nt he synthesis of one-dimensional structures at the micron scale. [8][9][10] Recently,anew class of microstructures, silica rods, has emerged. [11,12] Being in ad ifferent size domain, these rods can provide completely differentp roperties and applications compared to the nanorods.…”

Section: Introductionmentioning

confidence: 99%

“…The last two decades have seen remarkable growth in the synthesis, assembly, and applications of finite‐sized one‐dimensional nanostructures (nanorods and nanowires) made of noble metals and semiconductors . Comparatively few efforts have focused on the synthesis of one‐dimensional structures at the micron scale . Recently, a new class of microstructures, silica rods, has emerged .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Finite‐Sized One‐Dimensional Silica Microstructures (Rods): Synthesis, Assembly, and Applications

Sharma

2017

ChemNanoMat

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Colloidal silica structures are very important for applications such as superhydrophobic, oleophobic, icephobic, and anti‐biofouling coatings, polymer–ceramic or metal–matrix composites, photon management, catalyst support, and drug delivery. In addition to various types of silica structures, a unique structure—silica rods—has been synthesized by employing the emulsion droplets made by adding water and citrate to polyvinylpyrrolidone pentanol solution. While significant progress has been made in modifying rod shape and chemistry, in rod assembly, and in rod applications, however, no review article has discussed the progress in this field. This Focus Review intends to highlight the developments in the synthesis, assembly, and application of these rods, and discuss the remaining challenges for precise control of size and shape, possible solutions, and potential applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Finite‐Sized One‐Dimensional Silica Microstructures (Rods): Synthesis, Assembly, and Applications

Sharma

2017

ChemNanoMat

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“…Porous ceramics that are robust in harsh environments are increasing in demand for a wide range of applications, such as thermal insulators, solid oxide fuel cells (SOFCs), catalysts, heat exchangers, high‐temperature transducers, and filter materials . Because of recent environmental regulations and global actions to mitigate climate change, attention has begun to target applications in the field of high‐temperature separation filters, which could benefit various applications, ranging from diesel engines to power plants to metal industry among others, some of which require temperature robustness up to 1700–2000 °C .…”

Section: Introductionmentioning

confidence: 99%

Design, Fabrication, and Characterization of Porous Yttria‐Stabilized Zirconia Ceramics for Hot Gas Filtration Applications

et al. 2018

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Hot gas filtration is a lucrative target for a number of high temperature industrial operations, but new materials must be developed to withstand intense high temperature conditions. Here, the authors put the emphasis on porous yttria-stabilized zirconia (YSZ) ceramics for hot gas filtration, owing to their high thermodynamic stability and toughness. The authors design and fabricate porous YSZ ceramics using a pore-forming inclusion technique, where a polymeric pore former is mixed and compacted with YSZ powder. After burning off, the polymer leaves behind a controlled amount of porosity before sintering commenced. The authors systematically investigate the sintering temperature, polymer particle size, and polymer-to-ceramic ratio to optimize the open porosity, pore size, gas permeability, and hardness of porous YSZ ceramics. The authors then evaluate the performance of porous YSZ ceramics under industrial conditions by cyclic heating/cooling testing and high temperature exposure testing. The authors show, for the first time, porous YSZ ceramics can perform in hot gas filtration applications at 1400 C for extended thermal cycling or at 1700 C for limited periods of time.

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“…Owing to their potential properties, porous ceramic materials have been of increasing interest for many advanced applications such as filter materials [1,2], catalyst carriers [3], heat exchangers [4], thermal insulators [5], and biomedical implants [6,7]. Recently, applications in various fields for separation filters have become important in reducing environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Permeability and mechanical integrity of porous biomorphic SiC ceramics for application as hot-gas filters

et al. 2016

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Biomorphic SiC is a biotemplated material fabricated by Si melt-infiltration of carbon preforms from wood pyrolysis. In this work, porous bioSiC ceramics from five different wood precursors, with porosities between 45 and 72% were studied for their feasibility in filtering applications. Gas permeability and mechanical stability were investigated as a function of the microstructure of the starting wood precursor. Air-permeation performance at room temperature was measured for a range of flow rates, and the permeability constants were assessed by fitting of Forchheimer's equation to the experimental data. Darcian permeabilities were achieved in the range 10 −11 -10 −12 m 2 , while inertial terms were in the range 10 −7 -10 −8 m, showing a correlation with the average pore size and orientation of the larger channels. Regarding the mechanical stability, maximum compressive strength values were reached in the range of 3-115 MPa. These results improve our understanding of the ways in which the microstructure influences permeability and mechanical robustness, enabling the device requirements to be tailored by selecting the wood precursor. It was also shown that these materials are promising for hot-gas filtering applications.

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Controlled growth of zinc oxide microrods by hydrothermal process on porous ceramic supports for catalytic application

Cited by 23 publications

References 47 publications

Finite‐Sized One‐Dimensional Silica Microstructures (Rods): Synthesis, Assembly, and Applications

Finite‐Sized One‐Dimensional Silica Microstructures (Rods): Synthesis, Assembly, and Applications

Design, Fabrication, and Characterization of Porous Yttria‐Stabilized Zirconia Ceramics for Hot Gas Filtration Applications

Permeability and mechanical integrity of porous biomorphic SiC ceramics for application as hot-gas filters

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