Efficient Heterogeneous Catalytic Hydrogenation of Acetone to Isopropanol on Semihollow and Porous Palladium Nanocatalyst

Balouch, Aamna; Umar, Akrajas Ali; Shah, A.; Salleh, Muhamad Mat; Oyama, Munetaka

doi:10.1021/am403087m

Cited by 60 publications

(46 citation statements)

References 44 publications

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“…10 In addition, these methods realize the formation of (001) faceted anatase TiO 2 in the solution that may limit their usage in particular applications, such as solar cells, optoelectronic devices and heterogeneous catalysis. [20][21][22][23][24][25][26] In this paper, we describe the synthesis of a Zn-doped TiO 2 nanowall (ZnTNW) with a highly porous (001) face directly on the substrate surface via a liquid-phase deposition (LPD) method using a new uoride scavenger, ZnNO 3 , instead of the boric acid, normally used in the LPD process. 11 Although pristine anatase TiO 2 has shown excellent performance in existing applications, metal doping has been discovered to further improve its performance.…”

Section: Introductionmentioning

confidence: 99%

Porous (001)-faceted Zn-doped anatase TiO₂nanowalls and their heterogeneous photocatalytic characterization

et al. 2014

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The synthesis of a poriferous and high energy (001) faceted anatase Zn-doped TiO 2 nanowall (ZnTNW), vertically grown on an indium tin oxide substrate, is presented. The ZnTNW was prepared using a modified liquid phase deposition method using zinc nitrate (Zn(NO 3 ) 2 $xH 2 O) as a fluoride scavenger in the presence of hexamethylenetetramine. In a typical procedure, the ZnTNW nanowall with length and thickness of approximately 2 mm and 60 nm, respectively, can be obtained from the reaction during a 5 h growth process. X-ray diffraction analysis shows that the nanowall has an anatase structure with a dominant high energy (001) basal plane. Meanwhile, the X-ray energy dispersive analysis confirms the presence of Zn in the TiO 2 nanowall. High resolution transmission electron microscopy analysis results reveal, surprisingly, that the ZnTNW is single crystalline in nature although it has a highly porous (surface and bulk) structure. Photocatalytic properties of the ZnTNW were examined in the degradation of methylene blue. It was found that the ZnTNW exhibits excellent photocatalytic efficiency with kinetic reaction rate, turnover number and turnover frequency as high as 0.004 min À1 , 760 and 11 min À1 , respectively. The photocatalytic performance of the ZnTW was found to be higher for about 10% and 50% than the pristine TiO 2 nanowalls and (001) faceted poriferous TiO 2 microtablet, which reflected the effective effect of the Zn doping. The ZnTNW may find potentially use in photocatalytic heterogeneous applications.

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Section: Introductionmentioning

confidence: 99%

Porous (001)-faceted Zn-doped anatase TiO₂nanowalls and their heterogeneous photocatalytic characterization

et al. 2014

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“…And in the presence of the surfactant (HMT) here via an effective adhesion of its active amine functional onto the TiO 2 nanocrystallite, presumably on (001) plane, the nanorice of anatase TiO 2 that is bounded by this plane is realized. Such feature has also been found in the one-dimensional crystal growth in the case of ZnO [26,27] and platelet [28,29], brick-shape [30], nanofibrous [31,32] and multipods [33] nanocrystal in the case of Au, Pt and Pd. Therefore, in order to obtain the extent role of HMT in the formation of (001)-faceted TiO 2 nanorice, we examined the nanocrystal growth properties under a different HMT concentration.…”

Section: Tio 2 Nanorice Characterizationmentioning

confidence: 75%

Porous (001)-faceted anatase TiO₂nanorice thin film for efficient dye-sensitized solar cell

2016

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Anatase TiO2 structures with nanorice-like morphology and high exposure of (001) facet has been successfully synthesized on an ITO surface using ammonium Hexafluoro Titanate and Hexamethylenetetramine as precursor and capping agent, respectively, under a microwave-assisted liquid-phase deposition method. These anatase TiO2 nanoparticles were prepared within five minutes of reaction time by utilizing an inverter microwave system at a normal atmospheric pressure. The morphology and the size (approximately from 6 to 70 nm) of these nanostructures can be controlled. Homogenous, porous, 5.64 ± 0.002 μm thick layer of spongy-nanorice with facets (101) and (001) was grown on ITO substrate and used as a photo-anode in a dye-sensitized solar cell (DSSC). This solar cell device has emerged out with 4.05 ± 0.10% power conversion efficiency (PCE) and 72% of incident photon-to-current efficiency (IPCE) under AM1.5 G illumination.

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“…28 To achieve maximum catalytic efficiency in terms of yield of IPA many factors (microwave radiation power, effect of NaBH 4 , effect of time, and catalyst dose) were optimized. They produced the results as shown in Figures 5 and 6.…”

Section: Resultsmentioning

confidence: 99%

Selective Heterogeneous Catalytic Hydrogenation of Ketone (C═O) to Alcohol (OH) by Magnetite Nanoparticles Following Langmuir–Hinshelwood Kinetic Approach

Shah

Balouch

Rajar

et al. 2015

ACS Appl. Mater. Interfaces

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Magnetite nanoparticles were successfully synthesized and effectively employed as heterogeneous catalyst for hydrogenation of ketone moiety to alcohol moiety by NaBH4 under the microwave radiation process. The improvement was achieved in percent recovery of isopropyl alcohol by varying and optimizing reaction time, power of microwave radiations and amount of catalyst. The catalytic study revealed that acetone would be converted into isopropyl alcohol (IPA) with 99.5% yield in short period of reaction time, using 10 μg of magnetite NPs (Fe3O4). It was observed that the catalytic hydrogenation reaction, followed second-order of reaction and the Langmuir-Hinshelwood kinetic mechanism, which elucidated that both reactants get adsorb onto the surface of silica coated magnetite nanocatalyst to react. Consequently, the rate-determining step was the surface reaction of acetone and sodium borohydride. The current study revealed an environment friendly conversion of acetone to IPA on the basis of its fast, efficient, and highly economical method of utilization of microwave irradiation process and easy catalyst recovery.

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Efficient Heterogeneous Catalytic Hydrogenation of Acetone to Isopropanol on Semihollow and Porous Palladium Nanocatalyst

Cited by 60 publications

References 44 publications

Porous (001)-faceted Zn-doped anatase TiO₂nanowalls and their heterogeneous photocatalytic characterization

Porous (001)-faceted Zn-doped anatase TiO₂nanowalls and their heterogeneous photocatalytic characterization

Porous (001)-faceted anatase TiO₂nanorice thin film for efficient dye-sensitized solar cell

Selective Heterogeneous Catalytic Hydrogenation of Ketone (C═O) to Alcohol (OH) by Magnetite Nanoparticles Following Langmuir–Hinshelwood Kinetic Approach

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Efficient Heterogeneous Catalytic Hydrogenation of Acetone to Isopropanol on Semihollow and Porous Palladium Nanocatalyst

Cited by 60 publications

References 44 publications

Porous (001)-faceted Zn-doped anatase TiO2nanowalls and their heterogeneous photocatalytic characterization

Porous (001)-faceted Zn-doped anatase TiO2nanowalls and their heterogeneous photocatalytic characterization

Porous (001)-faceted anatase TiO2nanorice thin film for efficient dye-sensitized solar cell

Selective Heterogeneous Catalytic Hydrogenation of Ketone (C═O) to Alcohol (OH) by Magnetite Nanoparticles Following Langmuir–Hinshelwood Kinetic Approach

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Porous (001)-faceted Zn-doped anatase TiO₂nanowalls and their heterogeneous photocatalytic characterization

Porous (001)-faceted Zn-doped anatase TiO₂nanowalls and their heterogeneous photocatalytic characterization

Porous (001)-faceted anatase TiO₂nanorice thin film for efficient dye-sensitized solar cell