Article
Engineering, Chemical
Karen M. Ceron, Daniela Arias-Madrid, Jaime Gallego, Oscar E. Medina, Lidia E. Chinchilla, Farid B. Cortes, Camilo A. Franco
Summary: In this study, supported tungsten oxide nanoparticles were synthesized and evaluated for their performance in wet in situ combustion of n-C-7 asphaltenes. The results showed that these nanoparticles improved the decomposition of asphaltenes by reducing the decomposition temperature. The synthesis parameters, such as temperature and impregnation dosage, played an important role in the adsorptive and catalytic activity of the materials. The catalyzed decomposition of asphaltenes resulted in an increase in light hydrocarbons and hydrogen content.
Article
Chemistry, Multidisciplinary
Noah U. Naef, Stefan Seeger
Summary: Chemical vapor phase deposition was used to create hydrophobic nanostructured surfaces on glass slides, with subsequent creation of hydrophilic channels by sputtering a metal catalyst on them. The resulting open-channel system showed superior catalytic performance compared to nanostructure-free reference systems, with the created nanostructures proving stable under reaction conditions and exhibiting improved catalysis compared to flat reference systems.
Review
Chemistry, Physical
Jonathan Quinson
Summary: Precious metal nanomaterials, including iridium-based nanomaterials, are widely used in various fields such as optics, catalysis, pollution management, sensing, and medicine. Despite the relatively small size and easy synthesis of iridium nanoparticles and clusters, there is still limited understanding of their formation mechanisms. This review provides an overview of synthetic strategies for iridium nanoparticles and discusses their applications. Supplementary material is also provided, including synthesis protocols, the historical role of iridium nanoparticles in nanoscience, and their applications in catalysis.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yang Li, Zhaojian Zeng, Yong Chen, Yuanming Zhang, Wenjing Wang, Xiaoming Xu, Mengyang Du, Zhaosheng Li, Zhigang Zou
Summary: In this study, a bimetallic oxide catalyst FeVO4 with durable photocatalytic CO2 reduction activity was reported. FeVO4 is an indirect band gap semiconductor with a larger specific surface area and more oxygen vacancies. By tuning the morphology and exposing basic active sites, the catalytic performance of FeVO4 nanowires for CO2 reduction can be greatly improved.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Chong Wang, Qing-Wen Zhu, Jian-Gang Yu, Xin Li, Hao Li, Li-Ying Sun, Ying-Feng Han
Summary: Here, we demonstrate that a naphthalenediimide skeleton can promote the hierarchical assembly of a metal N-heterocyclic carbene macrocycle into various supramolecular structures. The macrocycle displays solvent-dependent supramolecular isomerization, and two different polymorphs are obtained from DMF and MeCN solvents. Co-precipitation with cuprous bromide anion leads to the formation of a tertiary structure. By utilizing donor-acceptor interactions, two cocrystal complexes with different supramolecular systems are successfully created. Additionally, the solid-state structure of the corresponding radical macrocycle confirms the presence of an ordered linear array formed through noncovalent interactions with the NHC-Au(i) macrocycle.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Biochemistry & Molecular Biology
James M. Thode, Daniel P. Harris, Cheng Wan, Brian M. Leonard
Summary: Research on platinum group transition metal carbides has been limited due to a lack of reliable synthetic approaches. The simple co-precipitation of Pd and W or Mo precursors followed by annealing can lead to the formation of ternary carbide powders, with increased solubility of Pd in the systems. These new materials show enhanced activity for the methanol oxidation reaction compared to industrial Pd/C.
Review
Chemistry, Multidisciplinary
Nabanita Pal, Debabrata Chakraborty, Eun-Bum Cho, Jeong Gil Seo
Summary: Nanoscopic materials play a versatile role in various emerging research fields. Due to their controllable particle size, diverse forms and morphologies, high surface area, and involvement of transition and non-transition metals, nanomaterials have become one of the most important areas of advanced research. By introducing porosity, nanomaterials have shown more promise than their bulk counterparts in catalysis, biomedicine, drug delivery, and other areas. This review aims to compile a set of papers on new synthesis methods and versatile applications of porous nanomaterials to provide an overview of current state-of-the-art research, particularly in catalysis and sensor area.
Article
Chemistry, Multidisciplinary
Xueying Qiu, Yin Zhang, Yanfei Zhu, Chang Long, Lina Su, Shaoqin Liu, Zhiyong Tang
Summary: Asymmetric photocatalysis using heterogeneous nanomaterials has made significant progress, meeting the requirements of modern chemistry for environmental friendliness and sustainable energy. By utilizing specific types of nanomaterials, such as semiconductors and porous materials, easy separation, recovery, and multiple reuse can be achieved.
ADVANCED MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Narek Sisakyan, Gayane Chilingaryan, Aram Manukyan, Alexander S. Mukasyan
Summary: Supercapacitors are energy storage devices that have the advantage of rapid energy storage and release compared to traditional batteries. Combustion synthesis is a powerful method for creating various nanostructured materials, including those commonly used for supercapacitor electrodes. The flexibility of solution combustion synthesis allows for tuning the properties of the materials, and the resulting nanostructured materials with large specific surface area enhance the performance of supercapacitor electrodes.
Article
Nanoscience & Nanotechnology
Yilin Zhao, Haotian Li, Yaoqiang Wang, Yawen Wang, Zhicheng Huang, Haijia Su, Juewen Liu
Summary: Nanoceria exhibits enhanced oxidase-like catalytic activity at low pH, leading to shape changes and the potential for synthesizing nanorods and nanoflowers.
ACS APPLIED NANO MATERIALS
(2021)
Article
Thermodynamics
Yuli Betancur, Diana Lopez, Jie Feng, Zhen-Yi Du, Wen-Ying Li
Summary: By adding K2CO3 catalyst under different atmospheres, the combustion properties of coal/biomass char blends can be improved. Blends containing high rank anthracite coal and low rank lignite coal exhibit different reactivity and activation energy under different atmospheres.
Article
Engineering, Environmental
Yuanshuang Zheng, Maya Marinova, Pascal Granger
Summary: The kinetics of the catalytic CH4/O-2 reaction on Pd/LaxMnO3 catalysts with different compositions (x = 0.7, 1.0, and 1.3) was studied. It was found that on Pd/La1.3MnO3 with a La-rich surface, a single site reaction mechanism was preferred, while on Pd-La0.7MnO3 with a Mn-rich surface, a dual-site reaction mechanism involving both Pd and surface reactive oxygen species was observed. High surface Pd/Mn ratio and high concentration of Pd-n(+) (n > 2) were identified as good indicators for the efficacy of Pd/LaxMnO3 catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Weijuan Yang, Xing Zhang, Xiaoyu Zhu, Lu Xu, Pengsheng Shi, Junhu Zhou
Summary: Experiments on premixed combustion of n-decane in micro-combustors revealed three combustion modes: homogeneous combustion (HMC), heterogeneous combustion (HTC), and coupled combustion (CC). Coupled combustion showed a wider combustion zone with more uniform temperature distribution, which is significant for applications like thermo-photovoltaic systems.
Article
Chemistry, Physical
Esteban Landaeta, Nir I. Kadosh, Zachary D. Schultz
Summary: Plasmonic dendritic electrodes of silver and cuprous oxide (Ag/Cu2O) are used to investigate the selective photoelectroreduction mechanism of CO2 to acetate. The mechanism is supported by the basic microenvironment, the semiconductor properties of Cu2O, and the accumulation of hot electrons from the localized surface plasmon resonance of Ag nanostructure.
Review
Chemistry, Physical
Jinzhe Liang, Yiyao Ge, Zhen He, Qinbai Yun, Guigao Liu, Shiyao Lu, Li Zhai, Biao Huang, Hua Zhang
Summary: Metal-containing nanomaterials have attracted increasing attention due to their unique physicochemical properties and promising applications. The phase of these nanomaterials, especially the amorphous phase and amorphous/crystalline heterophase, significantly influences their performance in catalysis and energy storage. This review provides an overview of the recent progress in wet-chemical synthesis and applications of amorphous and amorphous/crystalline heterophase metal-containing nanomaterials. Different categories of metal-containing nanomaterials, including metals, metal alloys, and metal compounds, are highlighted, along with their synthetic routes and promising applications. Current challenges and personal perspectives in this emerging research field are also discussed.
Article
Chemistry, Multidisciplinary
Amilton Barbosa Botelho Junior, Erika Freitas Pinheiro, Denise Crocce Roman Espinosa, Jorge Alberto Soares Tenorio, Marcela dos Passos Galluzz Baltazar
Summary: This study mainly focuses on the kinetics models and thermodynamics of lanthanum and cerium adsorption under industrially operating conditions, evaluating different functional groups of chelating resins. The results could be applied in industrial settings, with the pseudo-second order reaction providing better fitting for some resins.
SEPARATION SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Diego Armando Santos Alves, Amilton Barbosa Botelho Junior, Denise Crocce Romano Espinosa, Jorge Alberto Soares Tenorio, Marcela dos Passos Galluzzi Baltazar
Summary: This study aimed to investigate the use of biomass from a polluted area for the adsorption of Zn and Cu in wastewater treatment. The results showed that the biomass demonstrated high efficiency in adsorbing the metallic ions, making it a technically feasible option for industrial wastewater treatment.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Chemical
Carlos Gonzalo Alvarez Rosario, Amzy Tania Vallenas-Arevalo, Santiago Justo Arevalo, Denise Crocce Romano Espinosa, Jorge Alberto Soares Tenorio
Summary: Artisanal and small-scale mining are informal activities that help generate family income, but also lead to environmental and health impacts. This study explores the potential of a native strain to biodegrade cyanide under alkaline conditions, providing an alternative technology.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Miguel Antonio Soplin Pastor, Amilton Barbosa Botelho Junior, Jorge Alberto Soares Tenorio, Denise Crocce Romano Espinosa, Marcela dos Passos Galluzzi Baltazar
Summary: This study explores different approaches to remove organic matter in alumina production due to the decreased quality of bauxite resources. Advanced oxidative processes (AOPs) are considered as a potential solution, as they are commonly used in wastewater treatment and hydrometallurgy processes to degrade organic pollutants. The project focuses on ozonation of Bayer liquor for organic matter removal. The results show that under optimized conditions, a 19% removal of total organic carbon (TOC) can be achieved with a kinetic rate of 0.0157 h(-1) -21.9 mg/L O-3, 0.05 mol/L H2O2 at 80 degrees C. Furthermore, the study demonstrates the feasibility of applying AOP in an extremely alkaline condition.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Lidiane Maria Andrade, Amilton Barbosa Botelho Junior, Carlos Gonzalo Alvarez Rosario, Hugo Hashimoto, Cristiano Jose Andrade, Jorge Alberto Soares Tenorio
Summary: As modern electronics become more advanced, printed circuit boards are becoming smaller and more complex, resulting in an increase in copper concentrations in smartphones. Establishing standardized recycling processes to improve metal recovery is challenging. Biohydrometallurgy is a clean and cost-effective process for extracting critical metals from low-grade sources and waste electronic equipment.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2023)
Review
Engineering, Chemical
Juliana Mendes de Oliveira, Iara Alves Anes, Jorge Luis Coleti, Denise Crocce Romano Espinosa, Marcelo Siqueira de Carvalho, Jorge Alberto Soares Tenorio
Summary: Niobium (Nb) and Tantalum (Ta) are used to enhance mechanical resistance and produce lighter alloys. Nb production reached 78,000 tons globally in 2020. Recycling of these metals from tin slag contributes to the circular economy. Industrial challenges exist in extracting Nb2O5 and Ta2O5 from primary sources or tin slag, but various dissolution processes have been implemented.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Ana Eluiza Esther da Cunha Domingos, Amilton Barbosa Botelho Junior, Heitor Augusto Duarte, Jorge Alberto Soares Tenorio, Denise Crocce Romano Espinosa, Marcela dos Passos Galluzzi Baltazar
Summary: The study aimed to extract titanium (Ti) and vanadium (V) from the non-magnetic fraction of a Fe-Ti-V deposit in Brazil. Leaching experiments using HCl solution were conducted to evaluate the effect of various factors. The highest extraction rates of Ti (88.1%) and V (82.0%) were achieved using 30%HCl, a solid-liquid ratio of 1/6, and a NaHF2 dosage of 10% w/w at 85 degrees C. Kinetic modeling revealed diffusion control as the main mechanism for V leaching and solid product diffusion control for Ti leaching. The hydrometallurgical route proposed in this study is simple and allows for the production of high-purity products.
Review
Materials Science, Multidisciplinary
Dilshan Sandaruwan Premathilake, Amilton Barbosa Botelho Junior, Jorge Alberto Soares Tenorio, Denise Crocce Romano Espinosa, Mentore Vaccari
Summary: In order to achieve global CO2 net zero, transport vehicles need to be adapted to an electrification system for electric vehicles. Furthermore, with the increasing consumption of electric devices and batteries, it is crucial to recycle spent batteries to achieve a circular economy. This review thoroughly examines recent literature on Lithium-ion Battery (LIB) recycling and proposes a decentralized line for pretreating different types of LIBs, identifying and discussing various treatment possibilities and segments to include in a common line.
Review
Materials Science, Multidisciplinary
David da Silva Vasconcelos, Jorge Alberto Soares Tenorio, Amilton Barbosa Botelho Junior, Denise Crocce Romano Espinosa
Summary: The exponential growth of electric and hybrid vehicles in the last five years has led to a potential waste problem with the end-of-life of their batteries. Li-ion batteries for vehicles are made from natural resources such as Li, Fe, Al, Cu, Co, Mn, and P. Among them, LiFePO4 cathode materials have demonstrated advantages in various aspects. The recycling of these batteries can be accomplished through pyrometallurgy or hydrometallurgy, with the latter being more advantageous due to its low energy consumption and CO2 emissions.
Review
Engineering, Chemical
Amilton Barbosa Botelho Junior, Jorge Alberto Soares Tenorio, Denise Crocce Romano Espinosa
Summary: The increasing demand for critical metals for net-zero technologies has led to the need for improved extraction and recycling processes. Membrane separation techniques have been evaluated for hydrometallurgical processes and have shown promising results. This study provides a literature review on the application of membrane techniques in industrial processes for obtaining critical metals, with a particular focus on lithium, cobalt, and rare earth elements.
Article
Green & Sustainable Science & Technology
Elena Kalinin Toss, Gustavo Coelho Feijoo, Amilton Barbosa Botelho, Denise Crocce Romano Espinosa, Marcela dos Passos Galluzzi Baltazar, Jorge Alberto Soares Tenorio
Summary: The goal of this study was to investigate the adsorption of Cd(II) and Ni(II) ions using biomass from polluted sites. Results showed that biomass could be used to adsorb these ions and pretreatments enhanced the activation of functional groups in the biomass. Under the conditions of pH 7.0 and metal ion concentration of 1.0 g/L, the removal efficiency of Cd(II) reached 55% with autoclaved biomass, while activated carbon achieved only 13%. This highlights the importance of low-cost adsorbents and suggests the potential for industrial activities to utilize contaminated sites for wastewater treatment.
JOURNAL OF SUSTAINABLE METALLURGY
(2023)
Article
Engineering, Chemical
Iara Alves Anes, Franco Garjulli, Marcelo Siqueira de Carvalho, Jorge Alberto Soares Tenorio, Denise Crocce Romano Espinosa, Jorge Luis Coleti
Summary: The aim of this study is to extract Nb from tin slag while leaving Ta solid. Leaching using a combined solution of HCl-NH4F was performed, and 100% of Nb and 5% of Ta were recovered from the leaching liquor within 4 hours at 85 degrees Celsius, using an L:S ratio of 20:1, NH4F: slag ratio of 0.12 g, and HCl concentration of 9.79 mol/L.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Review
Environmental Sciences
A. B. Botelho, M. D. C. R. da Silva, P. S. S. Camargo, D. D. Munchen, M. P. Cenci, D. A. Bertuol, H. M. Veit, J. A. S. Tenorio, D. C. R. Espinosa
Summary: The coronavirus pandemic has had a significant impact on society, including the generation of electronic waste. Behavior changes have led to increased consumption of electronic equipment and are expected to affect electronic waste generation in the years to come. This review article examines the differences between developed and emerging countries regarding electronic waste management and analyzes the effects of the pandemic. It suggests that emerging countries should focus on waste management policies to achieve recycling targets and emphasize circular economy and sustainable development goals.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Tiago Fernandes de Oliveira, Jorge Alberto Soares Tenorio, Denise Crocce Romano Espinosa
Summary: This paper focuses on the processing technologies for the exploitation and purification of Nb and Ta from primary and secondary ore sources. Fusion and leaching processes, along with solvent extraction and ion exchange technology, are commonly used in hydrometallurgical strategies to obtain mixed Nb and Ta products or separated compounds with a desired industrial purity. The use of organic or different mineral acids instead of fluoride-based acids allows the use of tertiary amines as organic extractants, providing an innovative and environmentally friendly strategy for separation and purification of Nb and Ta. Ion exchange technology also offers a way to obtain highly pure Nb and Ta compounds from low-grade sources. The paper provides an overview of recent literature on these hydrometallurgical processes and strategies.
MINERALS ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Lucio Rosso Neto, Carlos Henrique Borgert, Jose Roberto de Oliveira, Felipe Fardin Grillo, Gabriel Valerio Pereira Manfredi, Jorge Luis Coleti, Denise Crocce Romano Espinosa, Jorge Alberto Soares Tenorio, David Batista Gesuino, Tiago Elias Allievi Frizon, Eduardo Junca
Summary: This study investigates the potential of lime sludge as a fluxing material in pelletization and proposes an alternative route for waste utilization.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
