Author
Metta Chareonpanich
Other affiliations: Tohoku University, PTT Public Company Limited
Bio: Metta Chareonpanich is an academic researcher from Kasetsart University. The author has contributed to research in topics: Catalysis & Adsorption. The author has an hindex of 29, co-authored 99 publications receiving 2293 citations. Previous affiliations of Metta Chareonpanich include Tohoku University & PTT Public Company Limited.
Topics: Catalysis, Adsorption, Mesoporous silica, Sodium silicate, Chemistry
Papers published on a yearly basis
Papers
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TL;DR: In this article, the structure-activity relationship of amorphous (a-), tetragonal (t-), monoclinic (m-) ZrO 2 phase supported copper catalysts for methanol synthesis from CO 2 hydrogenation were investigated with X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), N 2 O chemisorption, H 2 -temperature programmed reduction (H 2 -TPR), Xray absorption spectroscopy (XAS), H 2 and CO 2 temperature-programmed des
256 citations
TL;DR: A novel asymmetrical supercapacitor of battery-type MnCo2O4 nanofibers//N-doped reduced graphene oxide aerogel (N-rGOAE) was fabricated in this work and leads to the awareness of the uncertain charge storage mechanism of the spinel-type oxide materials.
Abstract: The working potential of symmetric supercapacitors is not so wide because one type of material used for the supercapacitor electrodes prefers either positive or negative charge to both charges. To address this problem, a novel asymmetrical supercapacitor (ASC) of battery-type MnCo2O4 nanofibers (NFs)//N-doped reduced graphene oxide aerogel (N-rGOAE) was fabricated in this work. The MnCo2O4 NFs at the positive electrode store the negative charges, i.e., solvated OH–, while the N-rGOAE at the negative electrode stores the positive charges, i.e., solvated K+. An as-fabricated aqueous-based MnCo2O4//N-rGOAE ASC device can provide a wide operating potential of 1.8 V and high energy density and power density at 54 W h kg–1 and 9851 W kg–1, respectively, with 85.2% capacity retention over 3000 cycles. To understand the charge storage reaction mechanism of the MnCo2O4, the synchrotron-based X-ray absorption spectroscopy (XAS) technique was also used to determine the oxidation states of Co and Mn at the MnCo2O4 el...
181 citations
TL;DR: In this paper, the authors investigated factors affecting the yield of ZSM-5 zeolite synthesized from fly ash, i.e., the SiO 2 /Al 2 O 3 mole ratio, the presence of tetrapropyl ammonium bromide (TPABr), the holding temperature and time, and the initial pressure were investigated.
146 citations
TL;DR: In this paper, the effect of silica content on the physicochemical properties of the resulting catalysts as well as their catalytic activity in CO 2 hydrogenation was investigated in a CuO-ZnO+ZrO 2 -SiO 2 catalytic system.
144 citations
TL;DR: In this article, the influence of catalyst compositions on the physicochemical properties of the catalysts as well as their catalytic performance was investigated by means of N2-sorption, X-ray diffraction (XRD), inductively coupled plasma optical emission spectrometry (ICP-OES), scanning electron microscopy (SEM), H2-temperature programmed reduction (H2-TPR), H 2 and CO2 temperature-programmed desorption (H 2- and CO 2-TPD).
127 citations
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TL;DR: In this article, the utilization of fly ash in construction, as a low-cost adsorbent for the removal of organic compounds, flue gas and metals, light weight aggregate, mine back fill, road sub-base, and zeolite synthesis is discussed.
2,117 citations
TL;DR: In this paper, the authors present a review of coal fly ash at the global level, focusing on its current and potential applications, including use in the soil amelioration, construction industry, ceramic industry, catalysis, depth separation, zeolite synthesis, etc.
1,167 citations
TL;DR: In this article, the authors classify different types of sol-gel precursors and how these can influence a solgel process, from self-assembly and ordering in the initial solution, to phase separation during the gelation process and finally to crystallographic transformations at high temperature.
Abstract: From its initial use to describe hydrolysis and condensation processes, the term ‘sol–gel’ is now used for a diverse range of chemistries. In fact, it is perhaps better defined more broadly as covering the synthesis of solid materials such as metal oxides from solution-state precursors. These can include metal alkoxides that crosslink to form metal–oxane gels, but also metal ion–chelate complexes or organic polymer gels containing metal species. What is important across all of these examples is how the choice of precursor can have a significant impact on the structure and composition of the solid product. In this review, we will attempt to classify different types of sol–gel precursor and how these can influence a sol–gel process, from self-assembly and ordering in the initial solution, to phase separation during the gelation process and finally to crystallographic transformations at high temperature.
932 citations
TL;DR: In an attempt to give an order of magnitude regarding CO2 valorization, the most important aspects of CO2 capture and green routes to produce H2 are summarized and economical aspects of the production of methanol and DME are critically assessed.
Abstract: The recent advances in the development of heterogeneous catalysts and processes for the direct hydrogenation of CO2 to formate/formic acid, methanol, and dimethyl ether are thoroughly reviewed, with special emphasis on thermodynamics and catalyst design considerations. After introducing the main motivation for the development of such processes, we first summarize the most important aspects of CO2 capture and green routes to produce H2. Once the scene in terms of feedstocks is introduced, we carefully summarize the state of the art in the development of heterogeneous catalysts for these important hydrogenation reactions. Finally, in an attempt to give an order of magnitude regarding CO2 valorization, we critically assess economical aspects of the production of methanol and DME and outline future research and development directions.
927 citations
TL;DR: In this paper, a review gives an overview of fundamental aspects and recent research advances of heterogeneous photocatalytic CO2 conversion systems in the last 3 years, and the catalysts are categorized as one-step excitation semiconductor systems, one-stage excitation photosensitized semiconductor system, and two-step hybrid systems such as semiconductor heterojunction and Z-scheme systems.
Abstract: As a promising approach to achieving two objectives with one strategy, photocatalytic CO2 conversion for C1/C2 “solar fuels” production can provide a package solution to the current global warming and growing energy demand by using inexhaustible solar energy and increasing atmospheric CO2. Although numerous efforts have been made to enhance the CO2 conversion efficiency through developing photocatalysts and CO2 reduction systems in recent years, some challenges still remain in improving the activity and selectivity of the CO2 photoreduction reactions. This review gives an overview of fundamental aspects and recent research advances of heterogeneous photocatalytic CO2 conversion systems in the last 3 years, and the catalysts are categorized as one-step excitation semiconductor systems, one-step excitation photosensitized semiconductor systems, and two-step excitation hybrid systems such as semiconductor heterojunction and Z-scheme systems. Also, some suggestions are given for further confirming that the ca...
927 citations