Catalysis Today最新文献

Efficient hydrodeoxygenation of used cooking oil using molybdenum phosphide on silica supports for sustainable green fuel production 利用二氧化硅支架上的磷化钼对废食用油进行高效加氢脱氧，实现可持续的绿色燃料生产

IF 5.2 2区化学

Catalysis Today Pub Date : 2025-06-16 DOI: 10.1016/j.cattod.2025.115419

Patricia Reñones, Paula Mármol, Diana García-Pérez, Silvia Morales-delaRosa, Jose M. Campos-Martin

{"title":"Efficient hydrodeoxygenation of used cooking oil using molybdenum phosphide on silica supports for sustainable green fuel production","authors":"Patricia Reñones, Paula Mármol, Diana García-Pérez, Silvia Morales-delaRosa, Jose M. Campos-Martin","doi":"10.1016/j.cattod.2025.115419","DOIUrl":"10.1016/j.cattod.2025.115419","url":null,"abstract":"<div><div>This study investigated the catalytic hydrotreatment of triglycerides using molybdenum phosphide (MoP) supported on different silica-based materials and evaluated their performance in hydrodeoxygenation (HDO) reactions. The catalysts were synthesized using the phosphite method and characterized using techniques such as X-ray diffraction (XRD), nitrogen adsorption‒desorption isotherms, temperature‒programmed desorption (NH<sub>3</sub>-TPD), transmission electron microscopy (TEM), and Raman spectroscopy. Catalytic activity tests were conducted using methyl laurate (ML) and glyceryl trioleate (GLY) as model compounds, as well as used cooking oil (UCO). This study examined the effect of different supports, including silica and silica-alumina with varying pellet morphologies (cylinder and trilobe), on the catalytic performance. The results showed that MoP supported on trilobe silica (MoP/SiO<sub>2</sub>-t) exhibited the highest conversion rates, selectivity for hydrocarbons, and long-term stability over 100 h. The catalyst demonstrated superior deoxygenation efficiency, effectively reducing oxygenated intermediates. Compared with glyceryl trioleate, used cooking oil resulted in greater conversion due to the presence of additional reactive compounds. These findings highlight MoP/SiO<sub>2</sub>-t as a viable catalyst for scaling up sustainable biofuel production.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115419"},"PeriodicalIF":5.2,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Current understanding of Oxidative Coupling of Methane (OCM) reaction over supported Mn-Na2WO4 catalysts 负载型Mn-Na2WO4催化剂上甲烷（OCM）氧化偶联反应的研究进展

IF 5.2 2区化学

Catalysis Today Pub Date : 2025-06-15 DOI: 10.1016/j.cattod.2025.115426

Sagar Sourav , Rebecca R. Fushimi , Israel E. Wachs

{"title":"Current understanding of Oxidative Coupling of Methane (OCM) reaction over supported Mn-Na2WO4 catalysts","authors":"Sagar Sourav , Rebecca R. Fushimi , Israel E. Wachs","doi":"10.1016/j.cattod.2025.115426","DOIUrl":"10.1016/j.cattod.2025.115426","url":null,"abstract":"<div><div>This perspective reviews the current understanding of the Oxidative Coupling of Methane (OCM) reaction over the supported Mn-Na<sub>2</sub>WO<sub>4</sub>/SiO<sub>2</sub> catalyst, with a focus on recent insights gained from state-of-the-art in-situ and operando spectroscopic characterization and chemical probe experiments under controlled environments. The supported Mn-Na<sub>2</sub>WO<sub>4</sub>/SiO<sub>2</sub> catalyst exhibits dynamic structural changes during the OCM reaction, involving multiple reactive lattice and adsorbed oxygen species, each associated with different oxide phases. These oxygen species play distinct roles in various steps of the OCM mechanism. The catalytic active sites for activation of CH<sub>4</sub> are associated with isolated surface Na-WO<sub>x</sub> sites on the SiO<sub>2</sub> support and the role of surface MnO<sub>x</sub> sites on SiO<sub>2</sub> is to oxidatively dehydrogenate C<sub>2</sub>H<sub>6</sub> to C<sub>2</sub>H<sub>4</sub>. This paper provides a detailed discussion of these roles and also introduces new experimental data from Temporal Analysis of Products (TAP) studies to clarify the ongoing debate in the literature regarding the contributions of lattice versus adsorbed oxygen species in OCM reaction product formation. Additionally, recommendations are offered for optimizing the performance of supported Mn-Na<sub>2</sub>WO<sub>4</sub>/SiO<sub>2</sub> catalysts to enhance CH<sub>4</sub> activation and C<sub>2</sub> product selectivity.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115426"},"PeriodicalIF":5.2,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrified and dynamically operated C1 chemistry: An emerging platform for power-to-X 电气化和动态操作的C1化学：power-to-X的新兴平台

IF 5.2 2区化学

Catalysis Today Pub Date : 2025-06-14 DOI: 10.1016/j.cattod.2025.115427

Jiachun Wu , Yuge Yao , Alexander Adogwa , Fanxing Li , Ming Yang , Yizhi Xiang

{"title":"Electrified and dynamically operated C1 chemistry: An emerging platform for power-to-X","authors":"Jiachun Wu , Yuge Yao , Alexander Adogwa , Fanxing Li , Ming Yang , Yizhi Xiang","doi":"10.1016/j.cattod.2025.115427","DOIUrl":"10.1016/j.cattod.2025.115427","url":null,"abstract":"<div><div>Catalytic conversion of one-carbon (C<sub>1</sub>) molecules, such as CH<sub>4</sub>, CO<sub>2</sub>, and CO, into fuels and value-added chemicals is a vitally important process in the chemical industry. The C<sub>1</sub> catalytic reactions, including methane steam reforming and CO/CO<sub>2</sub> hydrogenation for methanol synthesis or liquid fuel/chemicals production based on the Fischer-Tropsch technology, are foundational to the conventional chemical/energy industry. Additionally, these C<sub>1</sub>-related catalytic reactions have also been identified as important platforms for the power-to-X (PtX) processes. By utilizing CO<sub>2</sub>, biogas, or waste CH<sub>4</sub> as the carbon sources, C<sub>1</sub> catalytic reactions facilitate the creation of synthetic fuels and valuable chemicals, effectively recycling carbon and reducing reliance on fossil resources. However, conventional C<sub>1</sub> catalytic reactions are typically operated at a very large scale and under a steady state for centralized production. For the PtX application, electrified and/or dynamically operated C<sub>1</sub> catalytic processes for distributed synthesis must be developed in order to use intermittent renewable electricity to drive the reactions. This perspective summarizes recent advances and discusses the opportunities and challenges of the conversion of C<sub>1</sub> molecules through electrified and dynamically operated catalysis.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115427"},"PeriodicalIF":5.2,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Atomic-scale mechanisms of enhanced photocatalytic hydrogen evolution in Mg/Zr-doped Ta3N5 Mg/ zr掺杂Ta3N5中增强光催化析氢的原子尺度机制

IF 5.2 2区化学

Catalysis Today Pub Date : 2025-06-13 DOI: 10.1016/j.cattod.2025.115424

Chunyang Zhang , Guijun Chen , Wenjia Gu , Yitao Si , Maochang Liu

{"title":"Atomic-scale mechanisms of enhanced photocatalytic hydrogen evolution in Mg/Zr-doped Ta3N5","authors":"Chunyang Zhang , Guijun Chen , Wenjia Gu , Yitao Si , Maochang Liu","doi":"10.1016/j.cattod.2025.115424","DOIUrl":"10.1016/j.cattod.2025.115424","url":null,"abstract":"<div><div>Mg-Zr co-doping in Ta<sub>3</sub>N<sub>5</sub> suppresses intrinsic defects, significantly enhancing the photocatalytic hydrogen production performance <em>via</em> water splitting. However, the microscopic mechanisms linking Mg/Zr dopants to carrier separation, Pt co-catalyst dispersion, and surface reactions remain unclear. Here, using first-principles calculations, we elucidate the individual and synergistic roles of Mg and Zr in improving the photocatalytic performance of Ta<sub>3</sub>N<sub>5</sub> for hydrogen evolution from water splitting. Mg and Zr doping facilitates carrier separation, compensates for intrinsic defects through charge compensation, and increases carrier concentration. Critically, the coupling of Mg with oxygen impurities modulates the surface electronic structure, promoting Pt dispersion, while Zr coupling with oxygen impurities modifies Pt single-atom electronic states, reducing the hydrogen evolution reaction energy barrier. The synergy between Mg-Zr co-doping and oxygen impurities maximizes the hydrogen evolution rate. This work resolves the debate on the mechanisms of Mg/Zr doping in Ta<sub>3</sub>N<sub>5</sub>, providing theoretical insights and design principles for efficient and stable photocatalytic systems.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115424"},"PeriodicalIF":5.2,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coke assessment in spectroscopic and chromatographic studies of zeolite spent catalysts in ethylene oligomerisation 乙烯低聚反应中沸石废催化剂的光谱和色谱鉴定

IF 5.2 2区化学

Catalysis Today Pub Date : 2025-06-12 DOI: 10.1016/j.cattod.2025.115423

Oliwia Rogala , Karolina A. Tarach , Małgorzata Smoliło-Utrata , Joaquín Martínez-Triguero , Fernando Rey , Agata Olszewska , Kinga Góra-Marek

{"title":"Coke assessment in spectroscopic and chromatographic studies of zeolite spent catalysts in ethylene oligomerisation","authors":"Oliwia Rogala , Karolina A. Tarach , Małgorzata Smoliło-Utrata , Joaquín Martínez-Triguero , Fernando Rey , Agata Olszewska , Kinga Góra-Marek","doi":"10.1016/j.cattod.2025.115423","DOIUrl":"10.1016/j.cattod.2025.115423","url":null,"abstract":"<div><div>Over time, all catalysts lose their efficiency and selectivity for the reaction. The primary cause for zeolite deactivation in hydrocarbon reactions is the formation of coke deposits. The coke nature and location interdependence with the catalysts' structural, textural, and acidic characteristics were studied. For that, an ethylene oligomerisation as a model reaction was applied, with ethylene being a crucial intermediate in numerous sustainable processes. The parent ZSM-5 zeolite and its hierarchised analogues of different porous and acidic characteristics were chosen for study. Thermogravimetric and chromatographic analysis of coke deposited on spent catalysts (after 16 h of ethylene oligomerisation), alongside advanced FT-IR and UV–vis spectroscopic studies of temperature-programmed oxidation (TPO) of coke coupled with mass spectrometry, were conducted. As the lower V<sub>micro</sub> value corresponded to a reduced coke content, it is concluded that coke was predominantly formed in micropores, and the introduction of mesoporosity restricted its formation. In addition, spectroscopic investigations revealed that the high concentration of acid centres in micropores for parent and mildly modified samples favoured the formation of complex aromatic compounds. GC-MS analysis confirmed the presence of the aliphatic long-chain hydrocarbons, alkyl-substituted benzenes, naphthalenes, phenanthrenes, and pyrenic species. While naphthalenes were formed over microporous and mildly modified samples, only minor content was found for severely treated catalysts. Also, the aliphatic long-chain hydrocarbons and monoaromatics required lower temperatures for oxidation than polyaromatic species. These findings highlight that strong acid sites are responsible for forming polyaromatic compounds such as phenanthrene or pyrene-like species.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115423"},"PeriodicalIF":5.2,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Copper-decorated Biochar derived from sludge as eco-friendly nano-catalyst for efficient p-nitrophenol reduction 污泥中铜修饰生物炭作为高效还原对硝基苯酚的环保纳米催化剂

IF 5.2 2区化学

Catalysis Today Pub Date : 2025-06-11 DOI: 10.1016/j.cattod.2025.115421

Majda Ben Ali , Abdellah Benzaouak , Laura Valentino , Ali Moussadik , Mouatamid El Hazzat , Lokmane Abdelouahed , Adnane El Hamidi , Leonarda Francesca Liotta

{"title":"Copper-decorated Biochar derived from sludge as eco-friendly nano-catalyst for efficient p-nitrophenol reduction","authors":"Majda Ben Ali , Abdellah Benzaouak , Laura Valentino , Ali Moussadik , Mouatamid El Hazzat , Lokmane Abdelouahed , Adnane El Hamidi , Leonarda Francesca Liotta","doi":"10.1016/j.cattod.2025.115421","DOIUrl":"10.1016/j.cattod.2025.115421","url":null,"abstract":"<div><div>In the present study, Biochar produced from municipal sludge was used as support for copper nanoparticles (Cu NPs) to develop an efficient catalyst for environmental remediation and resource recovery. The catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with NaBH<sub>4</sub> was chosen as a benchmark reaction to evaluate the performance of the catalyst. This reaction is significant as it converts a toxic pollutant into a valuable intermediate with applications in pharmaceuticals and fine chemicals. Biochar-supported copper catalysts (Cu/Biochar) were synthesized with different Cu loadings (1, 2.5, 5, 7 and 10 wt%). Among these, 5.5 %Cu/Biochar showed good catalytic activity, achieving a 97 % reduction of 4-NP to 4-AP in eight minutes, with an apparent rate constant (K<sub>app</sub>) of 0.0045 s<sup>−1</sup>, using only 4 mg of catalyst. The catalyst demonstrated excellent stability and reusability for five consecutive cycles. Comprehensive characterization of the 5.5 %Cu/Biochar catalyst was performed using XRD, SEM-EDX, TEM, FTIR, TGA, and pH at the point of zero charge (pHₚzc). The results confirm that Biochar serves as an effective, low-cost, and sustainable support, enhancing the catalytic performance and stability of Cu NPs.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115421"},"PeriodicalIF":5.2,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rh/Al2O3 and Pd/Al2O3 three-way catalysts show different thermal deactivation behaviors under real engine-aging conditions Rh/Al2O3和Pd/Al2O3三元催化剂在发动机实际老化条件下表现出不同的热失活行为

IF 5.2 2区化学

Catalysis Today Pub Date : 2025-06-11 DOI: 10.1016/j.cattod.2025.115422

Tomoya Muta , Rion Ohta , Masayuki Tsushida , Keisuke Awaya , Junya Ohyama , Rikuo Koinuma , Takeshi Miki , Masato Machida

{"title":"Rh/Al2O3 and Pd/Al2O3 three-way catalysts show different thermal deactivation behaviors under real engine-aging conditions","authors":"Tomoya Muta , Rion Ohta , Masayuki Tsushida , Keisuke Awaya , Junya Ohyama , Rikuo Koinuma , Takeshi Miki , Masato Machida","doi":"10.1016/j.cattod.2025.115422","DOIUrl":"10.1016/j.cattod.2025.115422","url":null,"abstract":"<div><div>Full-scale honeycomb three-way catalysts (TWCs) coated with Rh/Al<sub>2</sub>O<sub>3</sub> and Pd/Al<sub>2</sub>O<sub>3</sub> were engine-aged under different gas atmosphere and temperature conditions to systematically investigate their thermal deactivation behaviors. The average metal particle size was determined by electron microscope analysis (<em>d</em><sub>EM</sub>) and CO chemisorption (<em>d</em><sub>CO</sub>). For Pd/Al<sub>2</sub>O<sub>3</sub>, <em>d</em><sub>EM</sub> and <em>d</em><sub>CO</sub> were similar, suggesting the deactivation was simply associated with Pd sintering. The average Pd particle size increased significantly with aging temperature, from under 10 to over 100 nm. The effect of gas atmosphere on particle size was practically negligible. Contrastingly, for Rh/Al<sub>2</sub>O<sub>3</sub> the Rh particle size remained approximately one order of magnitude smaller than Pd, and the temperature dependence was not as noticeable because of a lower sintering rate. Interestingly, <em>d</em><sub>CO</sub> and <em>d</em><sub>EM</sub> differed substantially depending on the gas atmosphere. Such discrepancy was rationalized by the incorporation of Rh<sup>3</sup><sup>+</sup> into the Al<sub>2</sub>O<sub>3</sub> surface structure. Most likely, depending on the atmosphere, a strong anchoring effect at the Rh-Al<sub>2</sub>O<sub>3</sub> interface led to preserving highly dispersed metallic Rh nanoparticles on the Al<sub>2</sub>O<sub>3</sub> surface. The TWC deactivation behavior was remarkably different depending on the platinum group metal, Pd or Rh.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115422"},"PeriodicalIF":5.2,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of nano alumina on the poly (vinyl alcohol)/rice husk ash nanocomposite films – properties and application 纳米氧化铝对聚乙烯醇/稻壳灰纳米复合膜性能及应用的影响

IF 5.2 2区化学

Catalysis Today Pub Date : 2025-06-11 DOI: 10.1016/j.cattod.2025.115420

Sukanta Daw, Abhishek Das, Sudip Kumar Das

{"title":"Effect of nano alumina on the poly (vinyl alcohol)/rice husk ash nanocomposite films – properties and application","authors":"Sukanta Daw, Abhishek Das, Sudip Kumar Das","doi":"10.1016/j.cattod.2025.115420","DOIUrl":"10.1016/j.cattod.2025.115420","url":null,"abstract":"<div><div>Poly (vinyl alcohol) (PVA)/Rice husk ash (RHA)/nano alumina (NAL) composites were synthesized with 5, 10, 15, 20, and 25 wt% of RHA and 2 wt% of NAL by sol-gel process. Glutaraldehyde (GLA) and sodium dodecyl sulfate (SDS) were used as crosslinking agents and surfactants, respectively. RHA and NAL's effects on the composite's thermal, mechanical, and chemical properties were observed. UV–vis spectral study, Fourier transform infrared (FTIR) analysis, X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the composites. UV–vis study estimates the UV barrier protection of the composite. FTIR spectra exhibit the physical and chemical bonding inside the PVA and its composite. XRD analysis estimates the crystalline and amorphous phases present in the film. SEM images show excellent compatibility between PVA, RHA, and NAL to ensure the influence of GLA and SDS on the composite. Degree of swelling (DS) solubility (S) and percentage of elongation at break (E%) were diminished by 72.71 %, 75.84 %, and 96.87 %, respectively, whereas tensile strength (TS) and Young's modulus (YM) were enhanced by 32.84 % and 1352.07 %, correspondingly, for the PVA/RHA/NAL composite relative to pure PVA. Water vapour transmission rate (WVTR) and moisture content (MC) were diminished by 46.82 % and 36.54 %, respectively, for the PVA/RHA/NAL composite compared to virgin PVA film. Thermogravimetric analysis (TGA) also established the higher thermal stability of PVA/RHA/NAL composite compared to PVA/RHA composite and virgin PVA film. The biodegradability of the PVA/RHA composite was increased significantly and attained 38 % in 120 days. The shelf-life of Guava has improved with the composite film for food preservation, and this biodegradable nanocomposite is used in food packaging.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115420"},"PeriodicalIF":5.2,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zero-valent iron nanoparticles synthesized by ultrasound for the adsorption of malachite green dye 超声合成零价铁纳米颗粒吸附孔雀石绿染料

IF 5.2 2区化学

Catalysis Today Pub Date : 2025-06-09 DOI: 10.1016/j.cattod.2025.115417

Laura Estefanía Lavado Romero , Indry Milena Saavedra Gaona , Carlos Arturo Parra Vargas , Daniel Llamosa Pérez , Jahaziel Amaya

{"title":"Zero-valent iron nanoparticles synthesized by ultrasound for the adsorption of malachite green dye","authors":"Laura Estefanía Lavado Romero , Indry Milena Saavedra Gaona , Carlos Arturo Parra Vargas , Daniel Llamosa Pérez , Jahaziel Amaya","doi":"10.1016/j.cattod.2025.115417","DOIUrl":"10.1016/j.cattod.2025.115417","url":null,"abstract":"<div><div>This study presents the synthesis of ultrasound (US) assisted zero-valent iron nanoparticles (nZVI) and their application in the adsorption of the dye malachite green (MG). The nZVI were characterized by X-ray diffraction (XRD), N<sub>2</sub> adsorption-desorption, Vibrating Sample Magnetometry (VSM), Fourier-transform Infrared Spectroscopy (FTIR), Raman spectroscopy, Scanning Electron Microscopy (SEM) and High-Resolution Transmission Electron (HR-TEM), Energy-dispersive X-ray Spectroscopy (EDX), and X-ray Photoelectron Spectroscopy (XPS), to determine their crystalline structure, magnetic properties, chemical composition and morphology. The effectiveness of nZVI in the adsorption of MG was evaluated under laboratory conditions using ultraviolet-visible spectroscopy (UV-Vis), which showed a maximum capacity of 97 % to reduce the dye concentration. The influence of the nZVI concentration and reaction time on the adsorption efficiency was investigated. The results indicate a rapid decolorization of MG in the presence of nZVI, highlighting the potential of this methodology for the environmental remediation of dye-contaminated wastewater. This approach offers significant advantages in terms of sustainability and efficiency, opening new perspectives in the application of nanotechnology for the remediation of contaminated water.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115417"},"PeriodicalIF":5.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144262931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel insight into the influence of supports on the performance of α-MnO2 catalysts for ozone-assisted VOC oxidation: A comparative study of inert and semiconductor supports, impact of operational parameters, and stability assessments 载体对臭氧辅助VOC氧化α-MnO2催化剂性能影响的新见解：惰性和半导体载体的比较研究，操作参数的影响，以及稳定性评估

IF 5.2 2区化学

Catalysis Today Pub Date : 2025-06-06 DOI: 10.1016/j.cattod.2025.115418

Farid Jafarihaghighi, Amir Payan, Jafar Soltan

引用次数: 0