MOF-based Heterogeneous Catalysis: A Frontier in Sustainable Chemical Transformations
1048 6799
Table of Content
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Exploration of Molybdenum Oxide Compounds-A Reviewby
Jyoti Bhattacharjee
and
Subhasis Roy
Abstract
The evolution of nanomaterials has been critical in modifying materials at the nanoscale for specialized uses. Carbon nanotubes were initially viewed as promising for electronics, but their inability to discriminate between semiconducting and metallic phases led to the creation of quasi-two-dimensional (Q-2D) materials. Molybdenum nanoparticles are utilized as alloy additions in corrosive and high-vacuum environments. Their characteristics differ significantly from those of their bulk counterparts. This review anal [...] 3402 21441 |
Leaf Mediated Curcuma sp. Silver Nanoparticles as Catalyst - Evaluating Their Antioxidant, Cytotoxicity, Para-Nitrophenol Catalytic and Photocatalytic ActivityAbstract
Nanotechnology is a fast-rising market in catalytic research; however, the production of eco-friendly nanoparticles remains a significant challenge. In this study, silver nanoparticles (AgNPs) were synthesized from the agro-industrial waste of leaves of C. longa, C. aromatica, C. caesia, C. zedoaria, and C. amada at RT after 24 h, which was confirmed with UV-spectrophotometric evaluation between 320-520 nm. SEM revealed cubic and 30-50 nm AgNPs, while band-gap energy was presented as semi-conductors. Synthesized Ag [...] 1132 7399 |
Kinetic Model for the Hydrolysis of Olive Oil by Lipase in Absence of EmulsifierAbstract
Lipase-catalyzed hydrolysis of olive oil has been studied in the absence of emulsifier. A simple mathematical model to predict the hydrolysis rate is derived from a proposed kinetic mechanism of the reaction. The hydrolytic reaction obeys Michaelis-Menten kinetics with a simultaneous second-order enzyme deactivation. The model predictions closely agree with the experimental results. 1181 8280 |
Effective Photogeneration of Singlet Oxygen and High Photocatalytic and Antibacterial Activities of Porous Mn-Doped ZnO-ZrO2 Nanocompositesby
Sergey Evstropiev
,
Andrey Shelemanov
,
Igor Bagrov
,
Anna Karavaeva
,
Kseniya Portnova
and
Nikolay Nikonorov
Abstract
Disperse porous Mn-doped ZnO-ZrO2 nanocomposites were prepared using the facile polymer-salt method. The effect of Mn content on the crystal structure, composite morphologies, their ability to photogenate the singlet oxygen, luminescence properties, and bactericidal activities were studied. The crystal structure and morphology of these materials were investigated using XRD and SEM analysis. It was found that obtained nanocomposites consist of small (~9 nm) hexagonal ZnO and fine ZrO2 crystals and the embedding of M [...] 811 6352 |
Determination of Reflectance Spectra and Colorimetry of Titanium and Tungsten Oxides Obtained by Microwave-assisted Hydrothermal SynthesisAbstract
Sustainability has driven the use of heterogeneous photocatalysis as one of the primary methods for environmental decontamination, reduction, degradation, remediation, or transformation of polluting chemical residues and purification treatment of effluents and wastewater. TiO2 is the most commonly used semiconductor in heterogeneous photocatalysis. It acquires relevance, as it has favorable properties, such as non-toxicity, stability in a wide range of pH, economic viability, etc., which encourage its application a [...] 787 5198 |
llmenite and Biomass Composite Nanomaterials - A Reviewby
Charitha Thambiliyagodage
,
Madara Jayanetti
,
Geethma Ekanayake
,
Amavin Mendis
,
Heshan Liyanaarchchi
and
Supuni Wijayawardana
Abstract
Ilmenite is a mineral whose crystallinity can be altered by chemical treatment, producing TiO2 and iron and titanium-based metal nanocomposites, which are applicable mainly for photocatalysis. Porous and crystalline biomass-derived carbon materials include graphene oxide, reduced graphene oxide, graphitic carbon nitride, catalytically graphitized sucrose and chitosan, and activated carbon. Ilmenite-based metal oxides coupled with biomass-based carbon materials are effective in environmental remediation, especially [...] 1071 7642 |
A Remarkable Pt Doped CNT Catalyst as a Double Functional Material: Its Application for Hydrogen Production and SupercapacitorAbstract
In this study, by producing bifunctional material, hydrolysis, and supercapacitor applications were investigated. The carbon nanotube-supported Pt catalyst was prepared using the sodium borohydride (NaBH4) reduction. Surface characterization of the synthesized Pt/CNT catalyst was performed using scanning electron microscopy-energy dıstrıbutıon X-ray spectrometer (SEM-EDX), X-ray diffraction (XRD), and transmission electron microscopy (TEM). Hydrolysis experiments were performed after deciding on the appropriate ato [...] 1019 6629 |
The Effect of SnO2 and Rh on Pt Nanowire Catalysts for Ethanol OxidationAbstract
In this study, we synthesized Pt-Rh nanowires (NWs) through chemical reduction of metallic precursors using formic acid at room temperature, excluding the use of surfactants, templates, or stabilizing agents. These NWs were supported on two substrates: carbon (Vulcan XC-72R) and carbon modified with tin oxide (SnO2) via the sol-gel method (10 wt.% SnO2). We explored the electroactivity of Pt/SnO2/C, Pt-Rh/C, Pt-Rh/SnO2(commercial)/C (commercial SnO2), and Pt-Rh/SnO2/C NWs toward electrochemical oxidation of ethanol [...] 1550 8015 |
Synthesis of NaA Zeolite: Conventional Route and Green RouteAbstract
The research describes a sustainable approach for the synthesis of zeolite NaA using kaolin as an alternative source of silica. The main objective of this research was to prepare NaA zeolite using metakaolin derived from kaolin from the state of Rio Grande do Norte, Brazil, as an alternative source of silica, reducing the production cost and evaluating its thermal stability. In addition, a study of the thermal stability of the zeolite and cost estimates for zeolite production were carried out. Traditional methods o [...] 1600 11130 |
Acknowledgement to Reviewers of Catalysis Research in 2023Abstract
The editors of Catalysis Research would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2023. We greatly appreciate the contribution of expert reviewers, which is crucial to the journal’s editorial process. We aim to recognize reviewer contributions through several mechanisms, of which the annual publication of reviewer names is one. Reviewers can download a certificate of recognition directly from our submission system. Additionally, reviewers can sign up to th [...] 709 4829 |
NaY Zeolite Synthesis from Vermiculite and Modification with SurfactantAbstract
This work focuses on preparing NaY zeolite using alternative sources of silica and modifying the zeolite with the surfactant cetyltrimethylammonium bromide. Two different hydrothermal synthesis routes were employed: the conventional method using sodium silicate as the silica source, and the other is a sustainable approach using vermiculite clay as the silica source. In traditional zeolite synthesis, sodium silicate is often used as the source of silica. However, . The vermiculite was subjected to an acid treatment, [...] 1629 9730 |
Synthesis of SAPO-34 Zeolite Membrane: Influence of Sources of SilicaAbstract
The research described the production and characterization of various materials, particularly alpha-alumina ceramic supports, zeolite SAPO-34, and zeolite membranes. Ceramic supports were manufactured through dry uniaxial compaction. Sintering of the supports was carried out at 1300°C for 2 h. SAPO-34 zeolites and zeolite membranes were synthesized through a hydrothermal process involving two steps: a first step at 38°C for 24 h and a second step at 200°C for 24 h. The research aimed to determine how different sili [...] 1356 10584 |
In Water High Yield and Selectivity of CH4 and H2 Production from CO2 Using UVC Light and a SiO2-surface-modified TiO2 Photocatalystsby
Oswaldo Núñez
,
Mohammad Fereidooni
,
Victor Márquez
,
Duangthip Sattayamuk
,
Piyasan Praserthdam
and
Supareak Praserthdam
Abstract
To improve CH4 and H2 formation from CO2 photoreduction using non-organic, non-laborious, and inexpensive photocatalysts, we have prepared two surface-silicate-modified TiO2 catalysts: P25-SiO2 and AmTiO2-SiO2 (amorphous TiO2) to be tested in water and using UV light. The last catalyst produces more CH4 and H2 in water than P25 (3:1 TiO2 anatase: rutile) under UV light irradiation of HCO3- and CO2; am-TiO2-SiO2 at pH = 7, produces 8 times more CH4 and H2 than P25 with selectivity at the reactor headspace of 30% and [...] 1560 8135 |
Nano Metal Oxide Frameworks (NOF): Development of New Heterogeneous Catalyst for the Synthesis of Furan Derivatives from GlucoseAbstract
A surface modification approach has prepared a nanostructured organic framework connecting two metal oxide NPs. The surface modifier attached two metal oxide NPs via molecular interaction to generate modular structures of fiber, rod, or sponge materials. Thus, obtained hybrid systems have been confirmed through FT-IR, TGA, PXRD, and SEM. Metal oxides such as Fe3O4 and MgO generated mixed materials via the surface modification approach. Thus, obtained materials have been successfully used to dehydrate biomass-derive [...] 1687 8317 |
Impact of Pt-Ni Nanoparticle Architecture on Electrocatalytic Oxidation Reaction in Fuel Cellsby
Nicolas A. Ishiki
,
Maria L. Della-Costa
,
Beatriz Keller
,
Kleper O. Rocha
,
Francielle Bortoloti
and
Antonio C. D. Ângelo
Abstract
This paper investigates how the aggregation of bimetallic nanoparticles (NPs) influences the electronic condition of the surface adsorption site and, hence, the performance of materials during the electrooxidation of fuels in an alkaline medium. First, we synthesized Pt-Ni NPs in three configurations: ordered intermetallic, ordinary alloy, and core-shell. The NPs contained Pt and Ni close to a 1:1 Pt/Ni atomic ratio. They had similar particle sizes, which allowed us to evaluate their performance without the influen [...] 1348 7602 |
Enzymes in Poly(Butylene-Succinate) Industry: An Overview on Synthesis Routes and Post-Processing Strategiesby
Daria Armani
and
Antonella Petri
Abstract
This paper will present some sectors in which enzymes can replace traditional catalysts in poly(butylene-succinate) industry, emphasizing the green chemistry aspects associated with these newer strategies. 1405 12410 |
Tungstophosphate Intercalated ZnAl Layered Double Hydroxide for Adsorptive and Visible Light Driven Photocatalytic Decolourisation of Organic DyesAbstract
Tungstophosphate (PW12O403-) intercalated ZnAl-Layered double hydroxide (ZnAl-PW12) was successfully synthesized through the rehydration of calcined LDH. Chemical analyses and characterizations by powder XRD, FT-IR, and Diffuse reflectance UV-Vis spectra confirmed the intercalation of PW12O403- ions equivalent to ~80% of the residual positive charge in the brucite layer. The efficiency of ZnAl-PW12 for decolourisation of four structurally different cationic/anionic dyes through simultaneous adsorption and photocata [...] 1163 7912 |
Perovskite Oxide Thermoelectric Module - A Way Forwardby
Abanti Nag
Abstract
In the era of renewable and sustainable energy, perovskite materials remain pioneers as energy harvesting materials, be it thermoelectric waste heat harvesting or photovoltaic solar cell application. Oxide perovskite material is an emerging thermoelectric material in solving energy shortage issues through waste heat recovery. The chemical and structural stabilities, oxidation resistance, and cost-effective and straightforward manufacturing process are a few advantages of the oxide-based thermoelectric materials. Th [...] 1693 9881 |
Nb2O5: Percentage Effect of T/H Phase and Evaluation of Catalytic Activity, a Preliminary Studyby
Michel Z. Fidelis
,
Elaine Trojan de Paula
,
Eduardo Abreu
,
Maria E.K. Fuziki
,
Onelia A. A. dos Santos
,
Rodrigo Brackmann
and
Giane G. Lenzi
Abstract
Due to its similar characteristics to titanium, niobium has become an attractive alternative in photocatalytic processes. Research indicates that titania has an optimal percentage of phases resulting in a commercial catalyst, P25, that contains more than 70% anatase with a minor amount of rutile and a small amount of amorphous phase. On the other hand, for Nb2O5, percentage optimization was little explored in the literature, which consists of studying the phases obtained via heat treatment individually and in diffe [...] 1289 7458 |
Enhancing Kerosene Selectivity of Fischer-Tropsch Synthesis by Periodical Pore Drainage Via Hydrogenolysisby
Carsten Unglaub
and
Andreas Jess
Abstract
Accumulation of wax inside the catalyst pores during transient cobalt-catalyzed Fischer-Tropsch synthesis (FTS) leads to unfavorable product distribution and low activity by imposing internal mass transfer limitations. The condensation of paraffin severely changes the apparent product stream that actually leaves the reactor before the catalyst pores are filled completely and the steady state is reached. Thus, the product distribution of the transient FTS is less complex than expected in comparison to the steady-sta [...] 1599 12620 |
Research and Application of Modified ZSM-5 for the Process of Alkylation of Oil Distillate FractionsAbstract
In the oil distillate fraction alkylation process, a modified Zr zeolite ZSM-5 was obtained and studied. The modification was executed using a method that impregnated ZSM-5 with a 5% solution of ZrOCl2∙6H2O. X-ray diffraction studies were conducted on zeolite ZSM-5, zirconyl chloride modifier ZrOCl2∙6H2O, and modified zeolite ZSM-5-ZrO2, which was calcined at temperatures of 200, 400, and 550°C. The results revealed that the phase composition of modified ZSM-5-ZrO2 zeolite samples varied depending on the calcinatio [...] 933 7132 |