Article
Materials Science, Multidisciplinary
Y. O. Mezhuev, M. Motyakin, I. Yu Vorobev, I. Plyushchii, A. L. Luss, I. S. Ionova, A. L. Kovarskii, Yu Cai, M. Shtilman, A. M. Tsatsakis, C. Zaharia, Yu Korshak
Summary: The study demonstrates the possibility of using EPR spectroscopy to monitor the concentration of polyaniline and control the kinetics of aniline polymerization. The research also reveals a change in the reaction order and proposes a new approach to deriving the rate equation for oxidative polymerization of aniline.
Article
Electrochemistry
Grzegorz Stando, Pawel Stando, Mika Sahlman, Mari Lundstrom, Haitao Liu, Dawid Janas
Summary: In this study, nanocomposites consisting of different forms of polyaniline and carbon nanotubes were synthesized. The addition of emeraldine salt polyaniline significantly improved the electrical conductivity and supercapacitor capacity of the nanocomposites, while also enhancing their mechanical properties.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Multidisciplinary
Hossein Baniasadi, Jon Trifol, Anton Ranta, Jukka Seppala
Summary: The study aimed to synthesize renewable polyamide 614/organoclay nanocomposites with improved structural, mechanical, and thermal properties through in-situ polymerization. The results showed enhanced dispersion and exfoliation of clay in the matrix, leading to improved mechanical and thermal properties in the nanocomposites. This study supported the benefits of using in-situ polymerization for engineering applications.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Applied
Christian Leonardo Herrera, Joao Victor Santiago, Julio Cezar Pastre, Carlos Roque Duarte Correia
Summary: This study describes a method for the enantioselective Heck-Matsuda reaction of cyclic and acyclic olefins directly from anilines. The method demonstrates a broad substrate scope and high enantioselectivity and yield in the synthesis of Heck adducts.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Energy & Fuels
Yanrong Zhu, Jude O. Iroh, Ramakrishnan Rajagopolan, Aydin Aykanat, Richard Vaia
Summary: This study systematically varied the feed composition to synthesize polyaniline (PANi) and polyaniline-clay nanocomposites (PACN), and analyzed their thermal properties. The results showed that increasing the oxidant concentration decreased the thermal stability and melting point of PANi, while the reinforcement of PANi with clay increased its thermal stability and melting point. The optimal thermal stability and melting point of PANi were achieved by adding about 0.1 wt% of the oxidant.
Article
Biochemistry & Molecular Biology
Olga Morozova, Irina Vasil'eva, Galina Shumakovich, Elena Zaitseva, Alexander Yaropolov
Summary: This study provides a comparative analysis of enzymatic and chemical polymerization of aniline in a buffer solution. The enzymatic polymerization using a laccase-mediator system led to the synthesis of conducting polymeric products, while the chemical polymerization resulted in a non-conducting dark brown product.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Aihui Wang, Hongyan Li, Hao Feng, Huimin Qiu, Rimei Huang, Yiqin Wang, Shichen Ji, Hong Liang, Xing-Can Shen, Bang-Ping Jiang
Summary: The in situ biosynthesis of functional conjugated polymers at the tumor site has been achieved for the first time, utilizing the specific characteristics of the tumor microenvironment. This approach offers great potential for tumor theranostics.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Cedric Pattyn, Dario Sciacqua, Lukas Kwiedor, Andrea Jagodar, Thomas Strunskus, Franziska Traeger, Thomas Lecas, Eva Kovacevic, Johannes Berndt
Summary: Low pressure capacitively coupled radiofrequency plasmas operated in a mixture of aniline vapor and argon are used for the deposition of thin films on silicon substrates. The influence of the aniline vapor fraction in the gas mixture upon the plasma properties and the characteristics of the deposited thin film is analyzed. Experiments highlight that the use of a low aniline/argon ratio leads to the deposition of an amorphous film whereas high-aniline/argon ratios allow the synthesis of a plasma polymer similar to polyaniline.
PLASMA PROCESSES AND POLYMERS
(2022)
Article
Chemistry, Multidisciplinary
Shatrudhan Palsaniya, Harshal B. Nemade, Ashok Kumar Dasmahapatra
Summary: The study presents the fabrication of symmetric tandem supercapacitors using PANI-RGO-ZnO nanocomposite, showing excellent electrochemical performance and capacitance retention over 5000 cycles. The device exhibited significant specific energy and power capabilities, with a steady voltage of around 6.0 V, demonstrating its potential for various applications.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Nanoscience & Nanotechnology
Hui Liu, You Tao, Huijuan Sun, Tian-Xiong Wang, Zhisheng Peng, Jiyou Jin, Zhongpu Wang, Kang Peng, Haonan Wei, Yong Jun Li, Bao-Hang Han, Lianfeng Sun
Summary: In this study, polyaniline was successfully synthesized on flexible substrates and demonstrated excellent conductivity and reversible redox properties. This has promising applications in supercapacitors and ascorbic acid sensors.
Article
Chemistry, Multidisciplinary
Tapas Kumar Dutta, Abhijit Patra
Summary: This study demonstrates the enhancement of electrical conductivity of COFs through post-synthetic modification with conducting polymers, resulting in composite materials with high conductivity and specific capacitance. The fabricated supercapacitor showed high energy and power densities, and the composite material successfully powered a green LED for 1 min after being charged for 10 s.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
J. Payandehpeyman, M. Mazaheri
Summary: A theoretical model describing the effective elastic modulus of exfoliated polymer-clay nanocomposites (PCNs) was developed, considering the geometric and mechanical properties of the clay layer, interphase layer, and matrix. The predictions from the model were compared with experimental data and showed reasonable agreement, indicating the model's effectiveness in analyzing the mechanical properties of PCNs.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Iqra Abdul Rashid, Ameer Hamza, Siraj Asim, Khadija Zubair, H. M. Fayzan Shakir, Ayesha Afzal, Zakariya Zubair
Summary: The chemical oxidative method was used to synthesize polyaniline (PANI) with APS as an oxidant and formic acid as a dopant. The precipitation of nickel ferrites (NiFe) was achieved using a co-precipitation method. The composites exhibited improved conductivity and magnetic permeability for high electromagnetic interference (EMI) shielding. Various tests were conducted on seven different composites to evaluate their morphology, DC conductivity, EMI shielding, etc. SEM analysis showed uniform dispersion of PANI and NiFe particles in NBR rubber, while DC conductivity increased from 10(-7) S/cm to 286 S/cm. XRD and particle size analysis confirmed the successful fabrication of PANI and NiFe, as well as their respective particle sizes. DSC analysis indicated a decrease in melting point due to the addition of PANI and NiFe in NBR rubber. The composite material achieved an EMI shielding of approximately 52 dB, whereas pure rubber provided only 1-2 dB.
Article
Polymer Science
Shivani Kalotra, Rajeev Mehta
Summary: The synthesis, characterization, and adsorption studies of polyaniline (PANI) and polyaniline/montmorillonite clay (PANI/MMT) nanocomposites have been conducted. The PANI/MMT nanocomposites, fabricated using in situ polymerization method, showed complete removal of Acid Green 25 (AG25) dye, with the adsorption data fitting a pseudo-second-order kinetic model. Due to its efficient and rapid dye removal, PANI/MMT nanocomposites are promising adsorbents for continuous adsorption systems.
Article
Energy & Fuels
Yanrong Zhu, Sandeep Kottarath, Jude O. Iroh, Richard A. Vaia
Summary: This study demonstrates the control of the structure of polyaniline-montmorillonite clay nanocomposites by varying the concentration of the oxidant. Various characterization techniques were used to investigate the structure of the nanocomposites, and electrochemical impedance spectroscopy analysis showed that the nanocomposite coating with highly intercalated clay exhibited enhanced durability.
Article
Chemistry, Analytical
Sanjeev Kumar, Anshul Kumar Sharma, Manreet Kaur Sohal, Davinder Pal Sharma, A. K. Debnath, D. K. Aswal, Aman Mahajan
Summary: By anchoring F16CuPc molecules onto rGO sheets, a room-temperature chemiresistive sensor capable of efficiently detecting chlorine gas has been developed, with a significant improvement in gas sensing characteristics confirmed through electrochemical impedance spectroscopy.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Ahmed M. Khalil, Laurent Michely, Remy Pires, Stephane Bastide, Khouloud Jlassi, Souad Ammar, Mohamed Jaziri, Mohamed M. Chehimi
Summary: This study focuses on valorizing agrowaste into biochar to serve as a support for bimetallic nanocatalysts, which have shown to be efficient in environmental remediation. The one-pot method devised in this work provides unique CuNi-decorated biochar and broadens the horizons of biochar-supported nanocatalysts.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Applied
Mostafa H. Sliem, Karthik Kannan, Muni Raj Maurya, Khouloud Jlassi, Kishor Kumar Sadasivuni, Bijandra Kumar, Aboubakr M. Abdullah
Summary: In this study, a three-dimensional MxOy/MAX hybrid material was fabricated by a hydrothermal method and showed excellent catalytic performance in the electrochemical reduction of CO2, with high efficiency and stability.
TOPICS IN CATALYSIS
(2022)
Article
Chemistry, Inorganic & Nuclear
Javad B. M. Parambath, Mahreen Arooj, Maria Omastova, Mohamed M. Chehimi, Sanghyun Kim, Changseok Han, Ahmed A. Mohamed
Summary: In this study, graphene oxide was decorated with gold-aryl nanoparticles by reducing aryldiazonium tetrachloroaurate(III) salt with sodium borohydride at room temperature. The resulting gold-aryl/graphene oxide nanocomposite exhibited a rough and wrinkled surface. X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller measurements confirmed the successful anchoring of gold nanoparticles on graphene oxide and a decrease in surface area of the nanocomposite.
JOURNAL OF CLUSTER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Redouane Achagar, Abdelhakim Elmakssoudi, Abderrahmane Thoume, Mohamed Dakir, Abdelaziz Elamrani, Yassine Zouheir, Mohamed Zahouily, Zouhair Ait-Touchente, Jamal Jamaleddine, Mohamed M. Chehimi
Summary: A facile and novel synthesis method was reported for the first time to synthesize thirteen 2-amino-3-cyanopyridine derivatives using a one-pot multicomponent reactions. The nanostructured diphosphate Na2CaP2O7 was used as an efficient and reusable catalyst, resulting in short reaction time and high yields. Additionally, five new pyrido[2,3-d]pyrimidine derivatives were synthesized and characterized. The synthesized compounds showed antibacterial activity against both Gram-positive and Gram-negative strains.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Applied
Atieh Aghajani, Marie-Pierre Santoni, Peyman Mirzaei, Ahmed A. Mohamed, Mohamed M. Chehimi, Mohamed Jouini
Summary: Alcohol oxidation is an important reaction in the food industry and pharmaceuticals. This study focuses on the use of gold nanoparticles as catalysts for alcohol oxidation. By modifying the nanoparticles with specific diazonium salts, the electrocatalytic performance of the nanoparticles in the oxidation of ethanol was enhanced. The results show that single-salt arylation leads to better catalytic performance compared to double-salt arylation, which is attributed to the hinderance of ethanol access caused by the hydrophobic effect of the diazonium salts.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Ahmed M. Khalil, Radhia Msaadi, Wafa Sassi, Imen Ghanmi, Remy Pires, Laurent Michely, Youssef Snoussi, Alexandre Chevillot-Biraud, Stephanie Lau-Truong, Mohamed M. Chehimi
Summary: This study focuses on the modification of biochar derived from agricultural wastes through phosphoric acid treatment and arylation organic reaction. The results reveal that the arylation process has minimal impact on the morphology of the biochar, and the degree of arylation is highest at a specific concentration. Additionally, this study presents the first report on the diazonium modification of agrowaste-derived biochar and its potential applications.
Article
Chemistry, Applied
Youssef Snoussi, Mohamed El Garah, Ahmed M. Khalil, Souad Ammar, Mohamed M. Chehimi
Summary: This study presents a versatile method to elaborate Ag/Cu nanoparticles on aryl-sulfonated sugarcane bagasse pulp-derived biochar through a phytochemical process. The deposition of metals alters the surface properties of biochar, resulting in a more graphitized nanocomposite. The catalytic performance of the composite catalyst shows significant potential in the oxidative degradation.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Lahcen Boubkr, Arvind K. Bhakta, Youssef Snoussi, Cora Moreira Da Silva, Laurent Michely, Mohamed Jouini, Souad Ammar, Mohamed M. Chehimi
Summary: The aim of this study is to convert waste from the brewing industry into functional biocarbon for environmental catalysis. A cost-effective and environmentally friendly method was developed to produce biochar with Ag-Cu nanocrystals through the impregnation of brewer's spent grain with copper and silver solutions followed by pyrolysis. The resulting catalyst showed high activity in removing dye pollutants.
Article
Biochemistry & Molecular Biology
Yasmine Chakroun, Youssef Snoussi, Mohamed M. Chehimi, Manef Abderrabba, Jean-Michel Savoie, Souheib Oueslati
Summary: Essential oils with antifungal activity and mycotoxin reduction ability are being considered as bioactive alternatives and environmentally friendly treatment against Fusarium species in cereals. However, their practical use is limited by high volatility, UV sensitivity, and fast oxidation. Encapsulation techniques can provide protection to the essential oils and control their release into the environment.
Review
Chemistry, Physical
Marlena Geca, Ahmed M. Khalil, Mengqi Tang, Arvind K. Bhakta, Youssef Snoussi, Piotr Nowicki, Malgorzata Wisniewska, Mohamed M. Chehimi
Summary: In recent years, biochar has gained recognition as a valuable biosourced material for tackling global challenges in various fields. This review focuses on the surface treatment of biochar using silane and other coupling agents, and summarizes the recent progress in this area. The correlation between the nature and extent of functionalization and the end applications of surface-engineered biochar is also discussed.
Article
Chemistry, Multidisciplinary
Ali Saad, Khouloud Jlassi, Manef Abderrabba, Mohamed M. Chehimi
Summary: A novel sorbent based on clickable mesoporous silica was successfully prepared, which exhibited high adsorption efficiency and fast removal rate for organic dyes, indicating significant potential for environmental applications.
CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Arvind K. Bhakta, Youssef Snoussi, Mohamed El Garah, Souad Ammar, Mohamed M. Chehimi
Summary: This study focuses on the valorization of brewer's spent grains (BSG) by converting them into biochar through different mechanical processes. The study demonstrates the impact of mechanical treatments on the morphology, crystallinity, and thermchemical properties of the resulting biochar. It opens up possibilities for the synthesis of biochar with controlled characteristics.
C-JOURNAL OF CARBON RESEARCH
(2022)
Article
Chemistry, Physical
Jessim Omiri, Youssef Snoussi, Arvind K. Bhakta, Stephanie Truong, Souad Ammar, Ahmed M. Khalil, Mohamed Jouini, Mohamed M. Chehimi
Summary: The immobilization of nanocatalysts on biochar is a simple, versatile, and efficient method that has attracted significant interest. This study proposes a direct approach to obtain bimetallic copper/nickel nanoparticles loaded on olive stone biochar. The use of citric acid in the process is found to play a significant role in the formation and catalytic performance of the nanoparticles.
COLLOIDS AND INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Radhia Msaadi, Wafa Sassi, Jean-Yves Hihn, Salah Ammar, Mohamed M. Chehimi
Summary: Pomegranate peel balls were evaluated as bioadsorbents for the removal of methylene blue dye from aqueous solutions. The adsorption followed pseudo-second order kinetics and the maximum adsorption capacity varied with temperature, with physical adsorption being the primary mechanism. The waste generated by pomegranate peel could be considered for future water filtration and environmental protection in countries where pomegranates are available.
EMERGENT MATERIALS
(2022)