Morphology control and photocatalytic characterization of yttrium-doped hedgehog-like CeO2

Xu, Bin; Zhang, Qitao; Yuán, Sàisài; Zhang, Ming; Ohno, Teruhisa

doi:10.1016/j.apcatb.2014.07.045

Cited by 40 publications

(18 citation statements)

References 38 publications

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“…The main fabrication methods are hydrothermal methods with surfactants and modifying agents. Our group has fabricated yttrium-doped ceria with hedgehog-like [43] and porous broom-like [44][45] hierarchical structures by using a template-free hydrothermal process.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and photocatalytic performance of yttrium-doped CeO2 with a hollow sphere structure

Zhang

Yuán

et al. 2017

Catalysis Today

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We report a facile and novel approach to prepare yttrium-doped CeO 2 with a hollow sphere hierarchical structure by a simple hydrothermal method with cerium nitrate hexahydrate and yttrium nitrate hexahydrate as original materials and polystyrene microsphere as a soft-template. Through systematic experiments, the effects of experimental parameters such as doping and morphology on photocatalytic characteristics of the ceria were examined in detail. The

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Section: Introductionmentioning

confidence: 99%

Synthesis and photocatalytic performance of yttrium-doped CeO2 with a hollow sphere structure

Zhang

Yuán

et al. 2017

Catalysis Today

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“…Various strategies are being developed to improve the photocatalytic properties of ceria-based materials: morphology control [172,173], doping by europium or yttrium [174,175], fabrication of heterojunctions [176], etc. Thus, in Ref.…”

Section: Photocatalysismentioning

confidence: 99%

Ag/CeO2 Composites for Catalytic Abatement of CO, Soot and VOCs

et al. 2018

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Nowadays catalytic technologies are widely used to purify indoor and outdoor air from harmful compounds. Recently, Ag-CeO 2 composites have found various applications in catalysis due to distinctive physical-chemical properties and relatively low costs as compared to those based on other noble metals. Currently, metal-support interaction is considered the key factor that determines high catalytic performance of silver-ceria composites. Despite thorough investigations, several questions remain debating. Among such issues, there are (1) morphology and size effects of both Ag and CeO 2 particles, including their defective structure, (2) chemical and charge state of silver, (3) charge transfer between silver and ceria, (4) role of oxygen vacancies, (5) reducibility of support and the catalyst on the basis thereof. In this review, we consider recent advances and trends on the role of silver-ceria interactions in catalytic performance of Ag/CeO 2 composites in low-temperature CO oxidation, soot oxidation, and volatile organic compounds (VOCs) abatement. Promising photoand electrocatalytic applications of Ag/CeO 2 composites are also discussed.Au [17][18][19][20][21][22][23], Ru [24,25], Rh [26][27][28][29], and Cu [30,31] were proposed. Metal oxide-based catalysts (Co 3 O 4 [32], MnO x [33], etc.) also attracted wide interest. However, a significant part of the developed catalysts has limited use under real conditions due to high costs of noble metals (the loading of palladium, platinum, gold is of 2-10 wt. %), relatively low stability to "hard" conditions of oxidation processes causing the loss of active component and reduction of the catalyst activity and selectivity. Therefore, the development of high-performance affordable and stable catalysts for low-temperature total oxidation of harmful compounds is still challenging. Efficiency and costs of such catalysts are connected with proper selection of the type of active component, support, and preparation method [34].Recently, supported silver catalysts have brought about wide interest due to their high activity in low-temperature oxidation processes. Different supports are studied (SiO 2 , CeO 2 , MnO x , TiO 2 , Al 2 O 3 , ZrO 2 , etc.) [35][36][37][38]. It is shown that an enhanced catalytic activity of Ag-based catalysts can be achieved by using reducible metal oxides as supports and by controlling the metal-support interaction to provide synergistic effect between active sites of the support and noble metal [39].Among the supports mentioned, CeO 2 brings about high interest, since it combines exceptional redox and acid-base properties with oxygen storage, which can be controlled by proper preparation methods and treatments. Moreover, these distinctive properties of ceria cause its wide applications as a support for catalysts. For this reason, highly active and relatively inexpensive Ag/CeO 2 composite is considered promising heterogeneous catalyst for total oxidation of harmful organic compounds, including formaldehyde [40], , soot [44][45][46][47][48][49]. The Ag...

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“…However, the CeO 2 is restricted to the absorption of a shorter wavelength of the light. Many researchers have been explored to extend the absorption wavelength of CeO 2 into the visible region by using semiconductor coupling, metal doping and so on [2,[5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A novel V-doped CeO₂loaded alkali-activated steel slag-based nanocomposite for photocatalytic degradation of malachite green

Kang

Zhang

Yang

et al. 2016

Integrated Ferroelectrics

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2016) A novel V-doped CeO 2 loaded alkali-activated steel slag-based nanocomposite for photocatalytic degradation of malachite green, Integrated Ferroelectrics, 170:1, 1-9, ABSTRACTIn the present study, V-doped CeO 2 loaded alkali-activated steel slag-based nanocomposite (V-CeO 2 -ASSN) as a novel catalyst for photocatalytic degradation of malachite green dye was firstly reported. X-ray diffraction (XRD) results demonstrated that there were mainly mineral phase of calcium silicate hydrate (CSH) and lawsonite, (CaAl 2 Si 2 O 7 (OH) 2 ·H 2 O) in the alkali-activated steel slagbased nanocomposites, and CeO 2 crystallite size is close to 20 nm dispersed on the surface of ASSN. The photocatalystic activity of vanadium doped CeO 2 loaded alkali-activated steel slag-based nanocomposite catalyst showed high degradation efficiency of malachite green (MG) dye under ultraviolet light irradiation, and the highest degradation rate can reach 100%. The photocatalytic degradation belongs to the first-order reaction kinetics.

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Morphology control and photocatalytic characterization of yttrium-doped hedgehog-like CeO2

Cited by 40 publications

References 38 publications

Synthesis and photocatalytic performance of yttrium-doped CeO2 with a hollow sphere structure

Synthesis and photocatalytic performance of yttrium-doped CeO2 with a hollow sphere structure

Ag/CeO2 Composites for Catalytic Abatement of CO, Soot and VOCs

A novel V-doped CeO₂loaded alkali-activated steel slag-based nanocomposite for photocatalytic degradation of malachite green

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Morphology control and photocatalytic characterization of yttrium-doped hedgehog-like CeO2

Cited by 40 publications

References 38 publications

Synthesis and photocatalytic performance of yttrium-doped CeO2 with a hollow sphere structure

Synthesis and photocatalytic performance of yttrium-doped CeO2 with a hollow sphere structure

Ag/CeO2 Composites for Catalytic Abatement of CO, Soot and VOCs

A novel V-doped CeO2loaded alkali-activated steel slag-based nanocomposite for photocatalytic degradation of malachite green

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Product

Resources

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A novel V-doped CeO₂loaded alkali-activated steel slag-based nanocomposite for photocatalytic degradation of malachite green