The growth mode of ZnO on HZSM-5 substrates by atomic layer deposition and its catalytic property in the synthesis of aromatics from methanol

Wang, Fei; Xiao, Weiyin; Gao, Lijing; Xiao, Guomin

doi:10.1039/c5cy01651g

Cited by 28 publications

(14 citation statements)

References 56 publications

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“…The epitaxial growth of the silicalite-1 shell is along the outside surface of the Z5 crystal. 15 , 34 STEM and EDS mapping analysis on the core–shell-structured Zn/Z5@S1 zeolite are given in Fig. 2c–h .…”

Section: Resultsmentioning

confidence: 99%

One-pass selective conversion of syngas to para-xylene

et al. 2017

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Section: Resultsmentioning

confidence: 99%

One-pass selective conversion of syngas to para-xylene

et al. 2017

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“…The XPS photo line of a pure ZnO sample as a reference is also reported, showing a binding energy (BE) of 1020.8 eV. [29] Zn species in both samples expressed higher BE than that of pure ZnO. Owing to the strong interaction between zinc and protonic acid sites a high binding energy is observed.…”

Section: Resultsmentioning

confidence: 91%

“…To study the nature of Zn species impregnated on microporous and mesoporous ZSM‐5 samples, XPS spectra of the Zn(2p 3/2 ) region were recorded (Figure 4). The XPS photo line of a pure ZnO sample as a reference is also reported, showing a binding energy (BE) of 1020.8 eV [29] . Zn species in both samples expressed higher BE than that of pure ZnO.…”

Section: Resultsmentioning

confidence: 92%

Mesostructured Zn/ZSM‐5 Zeolite as Catalyst for Furan Deoxygenation,

2022

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The furan conversion into aromatics over zinc promoted ZSM‐5 zeolites was studied in a continuous‐flow fixed‐bed reactor. Two series of microporous and mesoporous catalysts were prepared at different zinc loadings of 2 and 5 wt.%. It was intended to optimize the overall aromatics production and control coke accumulation over novel synthesized mesoporous ZSM‐5 catalyst, in a continuous flow reactor. The catalysts were characterized using X‐ray diffraction (XRD), nitrogen adsorption/desorption, ammonia temperature programmed desorption (TPD) and X‐ray photoelectron spectroscopy (XPS). The zinc loaded mesoporous materials exhibit an XRD pattern that matches with the ZSM‐5 XRD reference pattern. No extra peaks were observed in the XRD results indicating the high dispersion of zinc species. The initial furan conversion rate was higher over the microporous catalysts, and increased upon increasing metal loading, however contrary to the mesoporous samples, the microporous ones deactivated rapidly over 2 hours of time on‐stream. The results indicated that around 40 % of carbon in the fed furan, was recovered in aromatics when the new mesostructured zeolite catalyst was used, whereas this could be further increased to 50 % by the addition of zinc in the catalyst, benzene being the major product.

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“…The last heterojunctions that we will examine are the piezotronic principles in piezoelectric semiconductor/solution and piezoelectric semiconductor/insulator/solution systems ( Figure a). These interfaces are studied for use in a wide range of applications, including energy storage (e.g., batteries and capacitors), energy conversion (e.g., photo‐electrochemical cells), and materials synthesis (e.g., electrochemical deposition) . Analyzing the semiconductor/insulator/solution interface is similar to the case of the semiconductor/insulator/semiconductor heterojunction except that the expression for charge density will no longer depend on material band gaps and the density of immobile, ionized donor atoms as is the case within semiconductors.…”

Section: Two‐junction Piezotronic Systems: Piezoelectric Semiconductomentioning

confidence: 99%

Computation of Electronic Energy Band Diagrams for Piezotronic Semiconductor and Electrochemical Systems

German

Starr

Wang

2018

Adv Elect Materials

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Electronic energy band diagrams provide useful and illustrative information on how material stacking might affect electronic properties and charge transport throughout a multijunction device. However, schematic diagrams, which are often used in many publications, lack quantified changes in potential across junction interfaces. This is especially true as the energetics become increasingly unintuitive when incorporating the effects of dielectric layers and applying ferroelectric and piezoelectric charges, such as the case of piezotronics. In the paper, a quantitative band diagram computation of a series of complex heterojunctions often seen in piezotronic systems is provided. The computation is conducted by using fundamental semiconductor and electrochemical equations, idealizing metals, insulators, and ferroelectrics, and treating ferro‐ and piezoelectric dipoles as surface charges at their respective interfaces. A Mathematica code is used to produce potential profiles and energy band diagrams of sections of semiconductor‐based electrochemical electrodes. It is illustrated that the ferro‐ and piezoelectric properties have a profound effect on solid–solid heterojunctions and solid–electrolyte interfaces, offering a guideline for piezotronic system design and development.

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The growth mode of ZnO on HZSM-5 substrates by atomic layer deposition and its catalytic property in the synthesis of aromatics from methanol

Abstract: The resulting ZnO film on zeolites could effectively prevent exposing the HZSM-5 framework to steam during the reaction and regeneraton processes.

Cited by 28 publications

References 56 publications

One-pass selective conversion of syngas to para-xylene

One-pass selective conversion of syngas to para-xylene

Mesostructured Zn/ZSM‐5 Zeolite as Catalyst for Furan Deoxygenation,

Computation of Electronic Energy Band Diagrams for Piezotronic Semiconductor and Electrochemical Systems

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