Article
Spectroscopy
Mohamed Ahmed Abdel Hamid, Samar H. Elagamy, Aya Gamal, Fotouh R. Mansour
Summary: A simple and eco-friendly microwave method was used to prepare highly fluorescent nitrogen and sulfur co-doped carbon quantum dots (NS-CQDs) for the determination of ascorbic acid (ASC) in pharmaceutical dosage forms. The NS-CQDs were prepared within one minute using citric acid and L-cysteine. The fluorescence of NS-CQDs was quenched by ferric ions but could be restored by the addition of ASC due to its reducing properties.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Kiran P. Shejale, Arun Jaiswal, Aditya Kumar, Sumit Saxena, Shobha Shukla
Summary: The high-quality nitrogen-doped carbon quantum dots (NCQDs) synthesized using domestic microwave-assisted pyrolysis method exhibit excellent physiochemical and optical properties, and when incorporated into the DSSC structure, they lead to improved performance with high photoconversion efficiency and photocurrent density.
Review
Biochemistry & Molecular Biology
Lindokuhle Precious Magagula, Clinton Michael Masemola, Muhammed As'ad Ballim, Zikhona Nobuntu Tetana, Nosipho Moloto, Ella Cebisa Linganiso
Summary: Population growth, economic development, and climate change have led to increased attention and efforts towards environmental management and sustainability. The agricultural sector contributes significantly to waste generation, which is often disposed of in landfills or burned, causing pollution. Policymakers and researchers are now focusing on finding ways to create value-added products from agricultural waste to address the climate change crisis. Recent studies have demonstrated the production of carbon and polymeric materials from agricultural waste, such as cellulose nanocrystals and carbon quantum dots. These materials have the potential to be effective and competitive in emerging markets. This review summarizes the synthesis methods, properties, and potential applications of cellulose nanocrystals and carbon quantum dots synthesized from biomass waste, as well as discussing the current challenges and benefits of utilizing biomass waste.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Patricia M. Olmos-Moya, Sergio Velazquez-Martinez, Carlos Pineda-Arellano, J. Rene Rangel-Mendez, Luis F. Chazaro-Ruiz
Summary: A one-step microwave assisted solvothermal synthesis method was used to convert orange peels waste into co-functionalized carbon quantum dots with photoluminescent properties, chemical stability, and potential for improving the performance of solar cells.
Review
Chemistry, Multidisciplinary
Jian Gan, Lizhen Chen, Zhijun Chen, Jilei Zhang, Wenji Yu, Caoxing Huang, Yan Wu, Kai Zhang
Summary: Carbon dots (CDs), a type of carbon-based fluorescent nanomaterial, have gained attention for their excellent properties. Lignocellulosic biomass, a renewable natural resource, has the potential to produce CDs. This review summarizes the recent advances in the synthesis processes, formation mechanisms, structural characteristics, optical properties, and applications of lignocellulosic biomass-based CDs. It also proposes future research directions to improve the synthesis technology and enhance the properties of CDs using lignocellulosic biomass as raw materials.
Article
Chemistry, Physical
Arnau Call, Mihaela Cibian, Kosei Yamauchi, Ken Sakai
Summary: A water-soluble cobalt porphyrin catalyst was reported for efficient photoreduction of CO2 in fully aqueous media, with CO produced as the main product and high selectivity towards H2.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Materials Science, Multidisciplinary
Amit Ahlawat, Pawan S. Rana, Pratima R. Solanki
Summary: This study reported the photocatalytic degradation of RhB using microwave synthesized carbon quantum dots, confirming its ability to efficiently degrade RhB under UV light irradiation.
Article
Agricultural Engineering
Zhihui Chen, Shuaibin Zhang, Bochao Yan, Qinjie Cai, Suping Zhang
Summary: This study prepared phosphoric acid-activated lignin-based solid acid catalysts (PLSA) through phosphoric acid activation, carbonation, and sulfonation. The PLSA efficiently converted cellulose residue into levulinic acid, and the reaction conditions were optimized to achieve a high yield.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Inorganic & Nuclear
Xiantao Jiang, Zhijin Luo, Baoqu Zhang, Peiyuan Li, Jun'an Xiao, Wei Su
Summary: A peaceful synthetic method was used to successfully produce phthalocyanine-based carbon quantum dots, which exhibited high stability, good water dispersion and rich spectrum characteristics. These carbon quantum dots showed synergistic photothermal effects and ROS generation capability, and demonstrated strong photoinactivation for bacteria. Therefore, this research provides a new approach for the application of photodynamic therapy/photothermal therapy and antibacterial treatment.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Review
Chemistry, Inorganic & Nuclear
Huaxin Liu, Xue Zhong, Qing Pan, Yi Zhang, Wentao Deng, Guoqiang Zou, Hongshuai Hou, Xiaobo Ji
Summary: Among the carbon nanomaterials family, fluorescent carbon dots have emerged as significant members with outstanding characteristics and extensive applications. Despite the development of many synthesis strategies, achieving controllable synthesis remains challenging.
COORDINATION CHEMISTRY REVIEWS
(2024)
Article
Chemistry, Physical
Ruiting Guo, Lin Li, Baowei Wang, Yinger Xiang, Guoqiang Zou, Yirong Zhu, Hongshuai Hou, Xiaobo Ji
Summary: Carbon dots are a new class of carbon materials with ultrasmall size and unique physicochemical properties, showing great potential in various fields and particularly in the development of next-generation batteries. Studies have demonstrated the advantages of using carbon dots in electrode materials, separator, and electrolyte of advanced batteries, highlighting their importance in guiding the design of future high-performance batteries.
ENERGY STORAGE MATERIALS
(2021)
Review
Environmental Sciences
Chanchal Das, Mika Sillanpaa, Shabi Abbas Zaidi, Moonis Ali Khan, Goutam Biswas
Summary: Urbanization and population growth have led to a significant increase in solid waste generation, projected to reach 3.40 billion tons by 2050. Carbon-based quantum dots (Cb-QDs) derived from solid wastes have attracted research interest due to their wide range of applications. This review focuses on the conversion of solid wastes into useful materials for pollution reduction, specifically investigating sustainable synthesis routes of carbon quantum dots (CQDs), graphene quantum dots (GQDs), and graphene oxide quantum dots (GOQDs). The applications of these quantum dots in various fields are also discussed, along with the challenges in implementing existing synthesis methods and future research directions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Malgorzata Skorupska, Anna Ilnicka, Jerzy P. Lukaszewicz
Summary: Gelatine and chitosan were used as natural precursors for nitrogen-doping of the graphene foam structure to create active sites. The nitrogen-doped materials showed favorable electrochemical properties in the oxygen reduction reaction and could potentially replace platinum-based electrode materials in metal-air batteries or fuel cells.
Article
Chemistry, Analytical
Rong Liao, Si Dai, Biao Liu, Wenfang Deng, Yueming Tan, Qingji Xie
Summary: A novel strategy for photocurrent polarity switchable sensing is reported in this study by regulating electrostatic interactions between two semiconductor photoactive materials. The method achieves low detection limits and a wide linear detection range in the detection of HAase activity, providing a new and effective approach for photocurrent polarity switching and HAase activity detection.
ANALYTICAL CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Shuo Li, Lin Li, Hanyu Tu, Hao Zhang, Debbie S. Silvester, Craig E. Banks, Guoqiang Zou, Hongshuai Hou, Xiaobo Ji
Summary: The advancement in materials chemistry has significantly changed human lifestyle. Carbon dots, with their fascinating physicochemical properties, have been regarded as a groundbreaking carbon-based nanomaterial. However, the field of carbon dot-based materials chemistry remains incomplete due to their wide structural diversity, requiring further exploration. The review proposes novel viewpoints in this field and offers promising prospects for future developments.
Article
Environmental Sciences
Rafael R. Solis, Daily Rodriguez-Padron, Maria Angeles Martin-Lara, Monica Calero, Rafael Luque, Mario J. Munoz-Batista
Summary: An environmentally friendly solvent-free approach using spent coffee as a biomass sacrificial template was used to prepare TiO2 modified with CeOx. The use of coffee as a template allowed for the preparation of a nanostructured heterojunction without the need for a solvent. The incorporation of ceria in the structure significantly improved the photocatalytic benzaldehyde production.
Article
Environmental Sciences
Muhammad Usman Akram, Naseem Abbas, Muhammad Farman, Suryyia Manzoor, Muhammad Imran Khan, Sameh M. Osman, Rafael Luque, Abdallah Shanableh
Summary: A therapeutic system is designed to release drugs at specific target tissues without damaging healthy cells, by using chitosan-based polymeric nanoparticles containing N-isopropyl acrylamide and 2-(di -isopropyl amino) ethyl methacrylate.
Article
Chemistry, Multidisciplinary
Ya Ma, Yuhe Liao, Zhicheng Jiang, Qingyong Sun, Xingjie Guo, Wenhua Zhang, Changwei Hu, Rafael Luque, Bi Shi, Bert F. F. Sels
Summary: Controlling the self-assembly behaviors of soluble lignin oligomers is crucial for the construction of uniformly spherical lignin nanoparticles (LNPs) and their specific applications. Different H2O-organic solvent systems were used to solvolyze lignin in wood chips and obtain lignin oligomers with diverse structural features. The self-assembly behaviors of the lignin oligomers were greatly influenced by their structural features and the choice of organic solvents present.
Review
Chemistry, Multidisciplinary
Zhiwei Jiang, Yongjian Zeng, Di Hu, Ruichao Guo, Kai Yan, Rafael Luque
Summary: The synthesis of fuels and chemicals from platform molecules derived from lignocellulosic biomass is a promising strategy for renewable feedstock utilization. This review provides an overview of various transformations of 5-hydroxymethylfurfural (HMF) to produce fuels and chemicals, highlighting reaction mechanisms, recent progress, and challenges. It also summarizes and compares different catalysts and discusses the synthesis of value-added chemicals and fuels that can replace petrochemical products, reducing CO2 emissions.
Review
Chemistry, Multidisciplinary
Arthur Abinader Vasconcelos, Thomas Len, Alex de Nazare de Oliveira, Ana Alice Farias da Costa, Allan Rodrigo da Silva Souza, Carlos Emmerson Ferreira da Costa, Rafael Luque, Geraldo Narciso da Rocha Filho, Renata Coelho Rodrigues Noronha, Luis Adriano Santos do Nascimento
Summary: This review provides a comprehensive summary of distributed zeolite technology, including synthesis methods, structure formation, and applications in catalysis and bioprocesses. Zeolites, composed of Al, Si, and O, are versatile materials with various structures and properties. The specific synthesis parameters control the formation of unique chemical bonds and acid sites that contribute to zeolite's specificity and nanoreactor behavior. The use of natural sources as precursors reduces potential environmental pollution. Besides catalysis, zeolites also serve as a support material in bioprocesses. This review aims to explain the chemical nature, synthesis methods, precursors, and applications of zeolites in both chemical and biological processes.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Mechanical
Paulo Roberto Campos Flexa Ribeiro Filho, Matheus Rocha do Nascimento, Silvia Shelly Otaviano da Silva, Francisco Murilo Tavares de Luna, Enrique Rodriguez-Castellon, Celio Loureiro Cavalcante Jr
Summary: This study synthesized bio-based lubricants from the fatty acids of castor oil through esterification, epoxidation, and oxirane ring opening reactions. The sample obtained through the oxirane ring opening with water showed the best frictional performance and a lower friction coefficient compared to the commercial mineral oil.
Article
Chemistry, Physical
Janejira Ratthiwal, Noelia Lazaro, Antonio Pineda, Roberto Esposito, Zeid A. ALOthman, Prasert Reubroycharoen, Rafael Luque
Summary: In this study, the continuous-flow hydrogenation of furfural with 2-propanol was carried out using transition metal-based catalysts. C-MIL-101(Fe) and C-MIL-125(Ti) were successfully synthesized and compared for their performance in the hydrogenation of furfural. The calcined C-MIL-125(Ti) catalyst exhibited better furfural conversion and selectivity.
CATALYSIS COMMUNICATIONS
(2023)
Article
Environmental Sciences
Luis Angel Zambrano-Intriago, Erlinjka Valentina Daza-Lopez, Alex Fernandez-Andrade, Rafael Luque, Celia G. Amorim, Alberto N. Araujo, Joan Manuel Rodriguez-Diaz, Maria C. B. S. M. Montenegro
Summary: The aim of this study was to investigate the potential of the hybrid material MIL-53(Al)@RH for the adsorption of glyphosate in aqueous solution. The results showed that a maximum adsorption capacity of 296.95 mg g(-1) was achieved in 30 min with a ratio of 0.04 g MIL-53(Al)@RH/50 mL of solution at pH(0) 4. The adsorption kinetics and equilibrium were appropriately described by Avrami and pseudo-second order models, and Langmuir and Sips models respectively. Hydrogen bonds, pi*-pi interactions, and complexation between the metal centers of MIL-53(Al) and the anionic groups of glyphosate were postulated as the adsorption mechanisms.
Article
Environmental Sciences
Awais Ahmad, Faisal Ali, Zeid A. ALOthman, Rafael Luque
Summary: The utilization of folic acid as a stabilizing and capping agent allows for the synthesis of bimetallic nanomaterials. In this study, UV light assisted ZnO-Ag nanobars were prepared using folic acid as a stabilizing agent and were found to have a hexagonal structure with a crystallite size of 5.6 nm. These nanobars exhibited efficient catalytic activity, achieving up to 93% reduction of 4-nitrophenol and 90% reduction of Cr+6 in the presence of ascorbic acid.
Review
Chemistry, Applied
Alex de Nazare de Oliveira, Roberto da Silva Cardoso, Irlon Maciel Ferreira, Lineia Soares da Silva, Ana Alice Farias da Costa, Luiza Helena de Oliveira Pires, Geraldo Narciso da Rocha Filho, Rafael Luque, Renata Coelho Rodrigues Noronha, Luis Adriano Santos do Nascimento
Summary: The demand for green and economically viable processes has boosted the research and development of Ordered Mesoporous Silicas (OMSs) using low-cost starting reagents. However, high production costs and environmental contamination remain as obstacles to the production of high quality OMSs. Waste utilization can help reduce costs and environmental impacts by reusing materials that have no other applications.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Multidisciplinary Sciences
Elena Montejano-Nares, Francisco Ivars-Barcelo, Sameh M. Osman, Rafael Luque
Summary: Thermodynamic studies are crucial for understanding and improving the production of gamma-valerolactone from bio-derived methyl levulinate. The use of certain catalysts can greatly increase the selectivity of the reaction.
Article
Engineering, Environmental
Daniela Gier Della Rocca, Bruna Hedel, Enrique Rodriguez-Castellon, Regina F. P. M. Moreiraa
Summary: The use of ceramic membranes for microfiltration has increased due to their high performance and physical-chemical properties. However, their production is expensive. Geopolymeric membranes (GPMs) have been developed as a cheaper alternative by incorporating industrial waste. In this study, GPMs were synthesized by incorporating magnetic mining waste (MMW) and were used successfully to remove trimethoprim antibiotic from an aqueous solution.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Daniele Polidoro, Daniel Ballesteros-Plata, Alvise Perosa, Enrique Rodriguez-Castellon, Daily Rodriguez-Padron, Maurizio Selva
Summary: A series of catalysts based on non-noble metal nanoparticles supported on chitin-derived N-doped carbons were prepared through a one-step protocol in the presence of EDTA as a ligand. The synthesized materials were tested in the catalytic oxidation of alcohols to aldehydes and ketones, and Mo-N/C materials exhibited the best performance.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Otoniel Anacleto Estrela Filho, Bryan Fernando Rivadeneira-Mendoza, Kevin Jhon Fernandez-Andrade, Luis Angel Zambrano-Intriago, Fausthon Fred da Silva, Rafael Luque, Fabiola D. S. Curbelo, Joan Manuel Rodriguez-Diaz
Summary: The considerable amount of produced water discharged by the oil industry can cause environmental imbalance due to its harmful components. This study investigated the adsorption capacity of Zinc Imidazolate Framework-8 (ZIF-8) for crude oil removal from synthetic produced water. ZIF-8 exhibited high crystallinity and thermal stability, and its adsorption process was found to be spontaneous and exothermic.
ENVIRONMENTAL RESEARCH
(2024)
Article
Environmental Sciences
Jennifer Maria Navia Mendoza, Bryan Fernando Rivadeneira Mendoza, Jaime Cevallos Mendoza, Alina M. Balu, Rafael Luque, Luis Angel Zambrano Intriago, Joan Manuel Rodriguez-Diaz
Summary: In this study, a hybrid material MIL-53(Al)@HC was synthesized and demonstrated to have excellent adsorption capability for Ibuprofen sodium salt and Metsulfuron-methyl in a binary system. The hybrid material showed in situ crystal growth capability and could remove >98% of the target substances at extreme conditions. The adsorption kinetics and equilibrium were well described by the pseudo-second order model and the Sips and Freundlich models.
ENVIRONMENTAL RESEARCH
(2024)
