Article
Green & Sustainable Science & Technology
Fahad M. Alminderej, Abuzar E. A. E. Albadri, Yassine El-Ghoul, Wael A. El-Sayed, Alaa M. Younis, Sayed M. Saleh
Summary: This study investigates the utilization of dried date palm residues for dye removal by synthesizing carbon nanofibers (CNFs) through a green synthesis route. The characteristics of CNFs are studied using various instruments such as FTIR, BET, and SEM. The adsorption capacity of dyes onto CNFs improves with an increasing adsorbent dose and achieves equilibrium in around 60 hours. Kinetic models and isotherm models are introduced to study the adsorption process and equilibrium isotherms, with Langmuir isotherm model providing the best fit.
Article
Materials Science, Multidisciplinary
Amr A. Nada, Benjamin O. Orimolade, Heba H. El-Maghrabi, Babatunde A. Koiki, Matthieu Rivallin, Maged F. Bekheet, Roman Viter, Daina Damberga, Geoffroy Lesage, Igor Iatsunskyi, Emerson Coy, Marc Cretin, Omotayo A. Arotiba, Mikhael Bechelany
Summary: This study investigated the use of palladium loaded zinc oxide/carbon nanofibers as a novel photoanode for photoelectrocatalytic degradation of paracetamol. The results showed that the composite electrode exhibited higher photoelectrochemical activity and achieved efficient removal of paracetamol with significant mineralization. The Pd-ZnO/C composite has great potential for the photoelectrocatalytic removal of organic micropollutants.
APPLIED MATERIALS TODAY
(2021)
Article
Materials Science, Ceramics
Jing Wen, Heju Wang, Yang Li, Xiaogang Zheng
Summary: Developing highly recyclable photocatalysts is crucial for the industrial application of solar-light driven wastewater treatment. S,N,P-codoped carbon (SNP-C) nanofibers are modified with MoS2 (MoS2/SNP-C) for enhancing the adsorption and photocatalytic efficiency. The in-situ plasma induced sulfurization plays a significant role in generating vacant sites of RhB adsorption and facilitating the rapid transfer of charge carriers.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Toshiki Shimizu, K. Kanishka H. De Silva, Masanori Hara, Masamichi Yoshimura
Summary: We introduced a facile and economical method to fabricate graphene aerogels with controllable structural properties by incorporating carbon nanotubes and carbon nanofibers, and demonstrated their application in organic dye adsorption. The presence of oxygen functionalities gives an overall negative charge to the graphene aerogels, which exhibited a high adsorption capacity for cationic dyes and a relatively low adsorption capacity towards anionic dyes. The porosity of graphene aerogels, chemical and physical interaction of functional groups, overall charge on graphene aerogels and the dye molecules, and the size of the dye molecules are the main criteria that affect the selective dye adsorption.
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Thuan Van Tran, Duyen Thi Cam Nguyen, Ponnusamy Senthil Kumar, Azam Taufik Mohd Din, Amjad Saleh Qazaq, Dai-Viet N. Vo
Summary: In this study, green Mn3O4 nanoparticles synthesized using natural compounds extracted from Costus woodsonii flowers were characterized and their adsorption performance for malachite green dye was investigated. The results showed that the green Mn3O4 nanoparticles exhibited excellent adsorption capacity and stability.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Dilsad Dolunay Eslek Koyuncu, Mujgan Okur
Summary: In this study, paddy waste ash was used to produce carbon-silica hybrid and silica aerogels, with improved pore structure and dye removal performance. The adsorption experiments showed that the dye removal efficiency correlated with the zeta potential curve of the samples, indicating the importance of surface charge.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Liyuan Zhang, Hange Zhang, Kairui Liu, Jing Hou, Bolortuya Badamdorj, Nadezda V. Tarakina, Mengran Wang, Qiyu Wang, Xiaohan Wang, Markus Antonietti
Summary: Single-atom catalysts, which combine the advantages of homogeneous and heterogeneous catalysis, are widely used in various catalysis applications. The development of new support materials is crucial for achieving superior catalytic performance. In this research, carbon nanofibers synthesized from the reaction between P2O5 and NMP are reported. These carbon nanofibers have -P(sic)N- units, which serve as anchoring sites for single-atom catalysts. The Pt atoms anchored on the carbon nanofibers exhibit high activity for hydrosilylation. This research not only provides a new chemical strategy for synthesizing doped carbon nanofibers, but also presents a potential superior support material in catalysis.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Shuang Zong, Juan Du, Aibing Chen, Xueqing Gao, Xinying Liu, Linda L. Jewell
Summary: This study demonstrates a green and straightforward silica-assisted strategy to construct hierarchically porous carbon nanofibers (HPCF) with tunable morphologies. The optimized HPCF material exhibits high specific surface area and gravimetric capacitance, as well as ultra-long cycling stability in a supercapacitor. Furthermore, it shows great potential for practical applications, as evidenced by effortlessly lighting up light-emitting diodes.
JOURNAL OF POWER SOURCES
(2022)
Review
Materials Science, Composites
Ayesha Gul, Nader Ghaffari Khaligh, Nurdiana Nordin, Azman Ma'amor, Nurhidayatullaili Muhd Julkapli
Summary: This review presents the synthesis, functionalization, and applications of carbon nanofibers (CNF) in environmental, industrial, and biomedical fields. The article highlights the importance for readers to understand the production, latest trends, and fabrication techniques of CNF to obtain efficient, cost-effective, eco-friendly, and multi-potential applications of CNF-based nanocomposites (CNFN).
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Zhe Wang, Zhuo Li, Liying Liu, Peizhi Cao, Shupeng Li, Gang Kevin Li
Summary: Post-combustion carbon capture is an efficient way to mitigate CO2 emissions. However, traditional physical adsorbents face challenges in the presence of moisture. In this study, we synthesized polypyrrole adsorbent using Fenton's reagent and demonstrated its high adsorption capacity for CO2 in moist conditions. This green and facilely synthesized adsorbent has great potential for capturing carbon in high humidity flue gases.
Article
Environmental Sciences
Ngoan Thi Thao Nguyen, Luan Minh Nguyen, Thuy Thi Thanh Nguyen, Ngoc Hoi Nguyen, Dai Hai Nguyen, Duyen Thi Cam Nguyen, Thuan Van Tran
Summary: The occurrence of textile dyeing wastewater discharged into the environment has harmful effects on living organisms and human health. Green nanoparticles synthesized from floral waste extract show high efficiency in the photocatalytic degradation of harmful dyes. The green ZFOZx nanocomposites exhibit excellent recyclability and stability.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Polymer Science
Amani Saleh Almuslem, Nisrin Alnaim, Sobhy S. Ibrahim, Mostafa A. Ibrahim
Summary: This paper presents the development of innovative nanocellulose thin films composed of cellulose nanocrystals, polyacrylic acid, and active carbon for removing azo dyes from wastewater. The thin films were optimized in terms of composition and processing parameters, and their adsorption capacity was evaluated using thermodynamic isotherms and adsorption kinetics. The results show that the nanocellulose thin films exhibit high dye removal efficiency and adsorption capacity, making them suitable for water treatment systems.
Article
Engineering, Chemical
Bianca Swanckaert, Eva Loccufier, Jozefien Geltmeyer, Korneel Rabaey, Klaartje De Buysser, Luiza Bonin, Karen De Clerck
Summary: Electrochemical treatments in wastewater management have high potential, but the performance of ion-exchange membranes (IEMs) often limits their effectiveness. Sulfonated silica-based nanofiber cation-exchange membranes (CEMs) offer a solution to these limitations, thanks to their chemical resistance and self-cleaning properties. These nanofiber CEMs can be produced without the need for additional material and have excellent performance in lab-scale electrochemical tests, exhibiting resistance to strong acids and self-cleaning properties.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mengjie Zhang, Yang Lu, Zhenjie Yue, Mengmeng Tang, Xiaoke Luo, Chen Chen, Tao Peng, Xianming Liu, Yongsong Luo
Summary: In this study, pomegranate-like TiN@MXene microspheres with both adsorption capacity and catalytic effect on LiPSs conversion were prepared by combining two-dimensional layered material MXene and TiN. The interconnected MXene skeleton solves the stacking problem and ensures the uniform distribution of sulfur. The TiN@MXene cathode exhibits high initial discharge capacity, excellent rate performance, and long lifespan through the adsorption and transformation of LiPSs.
Article
Nanoscience & Nanotechnology
Govind Kumar Sharma, Nirmala Rachel James
Summary: High-performance green electromagnetic interference (EMI) shielding materials are in great demand for portable electronic devices and high speed digital communication devices. This study demonstrates a simple method to fabricate thin and lightweight N-doped carbon nanofibers (CNFs) containing LSCO nanoparticles (NPs) for EMI shielding applications. The CNFs incorporated with 25 wt % LSCO NPs showed high electrical conductivity and EMI shielding effectiveness in X band, K-u-band, and K-band. The flexible PDMS composites of LSCO-CNFs exhibited high EMI shielding effectiveness with enhanced mechanical properties and hydrophobicity.
ACS APPLIED NANO MATERIALS
(2023)
Article
Thermodynamics
Bruna Michele Arruda de Brito Buriti, Maria Eduarda Barsosa, Josue da Silva Buriti, Juliana de Melo Cartaxo, Heber Sivini Ferreira, Gelmires de Araujo Neves
Summary: This study aimed to synthesize and characterize organically modified palygorskite clay using cationic and nonionic surfactants for potential usage in oil-based drilling fluids. The results showed that the organophilization process was effective, and the modified clay displayed good rheological properties and thermal stability at high temperatures, making it suitable as an additive in oil-based drilling fluids.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Ceramics
Emanuel P. Nascimento, Rondinele N. Araujo, Hellen C. T. Firmino, Valmor R. Mastelaro, Francisco J. A. Loureiro, Gelmires A. Neves, Eliton S. Medeiros, Romualdo R. Menezes
Summary: This study utilizes the Solution Blow Spinning method to fabricate Al-SnO2/F-SnO2 hybrid fibers and applies them to room-temperature ethanol sensing. The results show that the composite material exhibits high sensitivity, short response/recovery times, and good selectivity and stability. The sensing response of the composite material is 9 times higher than pure SnO2 fibers, indicating its great potential.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
Fernando C. M. Freire Filho, Josiane A. Santos, Alex O. Sanches, Eliton S. Medeiros, Jose A. Malmonge, Michael J. Silva
Summary: The effects of multiwall carbon nanotubes (MWCNTs) on the electrical, dielectric, and piezoelectric properties of the ferroelectric ceramic/castor-oil polyurethane (PUR) composite films were investigated. The addition of MWCNTs significantly enhanced the electrical and piezoelectric properties of the composite films by acting as conductive bridges between the lead zirconate titanate (PZT) particles. The dispersion of MWCNT nanoparticles also improved the poling effectiveness and increased the d(33) coefficient of the three-phase piezoelectric composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Construction & Building Technology
Danbia Lisboa da Costa, Fabiana Pereira Costa, Jucielle Veras Fernandes, Haroldo Cavalcanti Pinto, Juliana de Melo Cartaxo, Gelmires de Araujo Neves, Romualdo Rodrigues Menezes, Alisson Mendes Rodrigues
Summary: This study investigates the effect of a-Al2O3 content, temperature, and curing conditions on the mechanical properties of metakaolin-based geopolymers containing a-Al2O3. The results show that temperature and curing time play a crucial role in the flexural strength (sf), with temperature being a significant factor in all experimental conditions. Inserting a pre-curing step at room temperature for 24 hours favored an increase in sf values. Regardless of the % a-Al2O3, the sf for samples with pre-curing did not vary significantly with the curing time.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Joao Fernandes Duarte Neto, Jucielle Veras Fernandes, Alisson Mendes Rodrigues, Romualdo Rodrigues Menezes, Gelmires de Araujo Neves
Summary: Two types of controlled-release fertilizers with lower urea release rates compared to standard fertilizers were developed using carnauba wax and bentonite as raw materials.
Article
Materials Science, Paper & Wood
Jessica S. Chagas, Julia N. S. Almeida, Anderson C. L. Pereira, Natalia F. I. Silva, Rafael A. Raimundo, Eliton S. Medeiros, Bruno A. S. G. Lima, Luciana S. Galvao, Amelia S. F. Santos, F. I. Silva
Summary: Cellulose-based materials have been extensively studied for their abundance, renewability, and low abrasiveness and density. This study investigates the effect of ultrasonic treatment on the yield and properties of cellulose nanocrystals (CNCs) from microcrystalline cellulose (MCC). The results show that ultrasonic power and hydrolysis time can both affect the production and quality of CNCs. The study suggests that there is an optimal hydrolysis time for each set of variables to achieve high CNC yield without compromising the structural and morphological properties.
Article
Materials Science, Ceramics
V. C. Silva, R. M. C. Farias, R. F. Bonan, J. M. Cartaxo, E. S. Medeiros, L. R. F. Figueiredo, G. A. Neves, R. R. Menezes
Summary: Biphasic calcium phosphate (BCP) cotton-wool-like nanofibrous scaffolds were prepared using air-heated solution blow spinning (A-HSBS), which demonstrated promising potential for tissue engineering. Characterization techniques including thermogravimetric analysis, X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy were employed. Results showed the formation of intertwined nanometric fibers, and the presence of BCP and CaO. In vitro experiments using simulated body fluid (SBF) and phosphate-buffered saline (PBS) solutions revealed a more homogeneous apatite layer on the surface of BCP/CaCO3 compared to BCP nanofibers. The degradation rates of BCP and BCP/CaCO3 scaffolds in PBS medium were found to be 21% (pH 8.3) and 14% (pH 7.8) after 14 days of immersion, respectively.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
A. A. A. Seixas, L. R. F. Figueiredo, A. S. F. Santos, E. S. Medeiros
Summary: In this study, the influence of glycerol prepolymers as chain extenders in post-consumer recycled PET was investigated. The addition of glycerol prepolymers reduced the viscosity and molecular weight of the recycled PET, and increased the number of carboxylic end groups. However, these additives had an opposite effect to the desired one, decreasing the molecular weight of the recycled PET.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Josenildo I. Santos Filho, Vanderlane C. Silva, Paulysendra F. Silva, Juliana M. Cartaxo, Alisson M. Rodrigues, Romualdo R. Menezes, Gelmires A. Neves
Summary: Perlite waste materials show potential in removing dyes from contaminated water, with reduction in particle size significantly affecting the removal of one dye while not impacting the removal of another.
Article
Green & Sustainable Science & Technology
Thainara de Lima Arruda, Fabiana Pereira da Costa, Rebeca Cavalcante Diniz, Alisson Mendes Rodrigues, Romualdo Rodrigues Menezes, Gelmires de Araujo Neves
Summary: This study aims to assess the durability of eco-friendly mortars with mineral waste as alternative raw materials. The results showed that partially replacing Portland cement with calcined scheelite tailing is feasible without compromising the mechanical performance and durability of the mortars. However, the use of non-calcined scheelite tailing is not recommended due to its detrimental effects on the mechanical properties of the mortars.
Article
Materials Science, Multidisciplinary
Raquel Santos Leite, Lucas Leite Severo, Danubia Lisboa da Costa, Rosiane Maria da Costa Farias, Lisiane Navarro de Lima Santana, Romualdo Rodrigues Menezes, Gelmires de Araujo Neves
Summary: A factorial design was used to evaluate the effects of processing variables on the morphology and microstructural characteristics of TiO2 fibers produced by solution blow spinning. The combination of polymer and solvent influences the crystalline phases and diameter of the TiO2 fibers.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
