Article
Biochemistry & Molecular Biology
Magdalena Laskowska, Agnieszka Karczmarska, Mateusz Schabikowski, Michal Adamek, Alexey Maximenko, Katarzyna Pawlik, Oliwia Kowalska, Zbigniew Olejniczak, Lukasz Laskowski
Summary: The effects of synthesis conditions on the size and structure of synthetic opals were investigated using the Stober process. The internal hierarchical structure of the resulting silica particles was confirmed, and the study showed no dependence on the concentration of reagents and the size of the particles. This research is significant for the synthesis and application of synthetic opals.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Analytical
Gurjaspreet Singh, Jashan Deep Kaur, Swati Pawan, Harshbir Kaur, Pooja Malik, Heena, Swati Devi, Mithun, Kamal Nain Singh
Summary: In this study, 3,5-dichloroaniline appended organosilanes were synthesized and characterized. Silica nanoparticles grafted with compound 4a showed selective recognition of Sn2+ ion. The practical applicability of probe 4a was also demonstrated in the analysis of drinking water.
MICROCHEMICAL JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Hiresh Moradi, Peyman Atashi, Omid Amelirad, Jae-Kyu Yang, Yoon-Young Chang, Telma Kamranifard
Summary: This study synthesized monodispersed silica nanoparticles directly from TEOS using the sol-gel process and the Stober method. By optimizing the process with a central composite design, the smallest particle size and lowest TEOS concentration were achieved. The results showed that the predicted optimization was consistent with experimental procedures and the model was significant at a 95% confidence level.
ADVANCES IN NANO RESEARCH
(2022)
Article
Chemistry, Physical
Ekaterina Yu. Stovpiaga, Daniil A. Eurov, Dmitry A. Kurdyukov, Nadezhda Glebova, Demid A. Kirilenko, Maria V. Tomkovich, Valery G. Golubev
Summary: The approach developed in this study aims to obtain submicron spherical particles of amorphous silica with interconnected micropores. By replacing a part of tetraethoxysilane (TEOS) with (3-methacryloyloxy) propyltrimethoxysilane (MPTMOS) in the reaction mixture, the particle growth mechanism changes and particles containing only micropores are formed. The synthesized microporous particles show higher adsorption capacity for transition-metal ions compared to particles with mesopores.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Environmental Sciences
Gurjaspreet Singh, Sanjay Sharma, Akshpreet Singh, Mohit, Anita Devi, Sofia Gupta, Pooja Malik, Sumesh Khurana, Sajeev Soni
Summary: The present study produces nanocomposites of silica-based organosilane as a fluorescent sensor for the selective detection of 2,4-D. The synthesized organosilane is grafted onto a silica surface and characterized using various spectroscopic techniques. The sensing system based on the synthesized materials shows good selectivity and sensitivity towards 2,4-D in real water samples with a recovery percentage of above 98%.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Medicinal
Jiayuan Wang, Wenqi Cao, Jianli Wang, Lingyu Zhu
Summary: This study proposes the use of colloidal particles stabilized Pickering emulsions for spherical crystallization, aiming to reduce or eliminate the use of surfactants due to their toxicity. The depletion attraction is utilized to enhance the stability of Pickering emulsions, resulting in high dispersed phase fraction and monodisperse spherical agglomerates.
JOURNAL OF PHARMACEUTICAL SCIENCES
(2022)
Article
Multidisciplinary Sciences
Mohammad Ghodrati, Mehdi Mousavi-Kamazani, Zohreh Bahrami
Summary: A superhydrophobic coating was synthesized for glass surfaces using spherical silica nanostructures modified with organosilane compounds. The central composite design (CCD) model of the response surface method was employed to optimize the conditions and achieve a high contact angle for the hydrophobic coating. Tetraethoxysilane (TEOS) was used as a precursor and poly(dimethylsiloxane) (PDMS) was used for surface modification of the silica nanostructure. Experimental tests confirmed the accuracy of the research, yielding a contact angle of 162 degrees. XRD, FT-IR, EDS, SEM, DLS, and AFM analyses were conducted to investigate the synthesis of the silica nanostructure. Chemical resistance tests showed that the coating exhibited good resistance in acidic and neutral environments, with contact angles of 127 degrees and 134 degrees, respectively.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Lyubov Bondarenko, Yaroslav Saveliev, Dmitry Chernyaev, Rose Baimuratova, Gulzhian Dzhardimalieva, Artur Dzeranov, Elena Kelbysheva, Kamila Kydralieva
Summary: This study investigates the efficiency of TEOS and APTES copolymer formulation in sol-gel syntheses. The response surface analysis shows that polymerization temperature and component ratio significantly affect zeta potential, while only component ratio affects product yield. By varying temperature, time, and component ratio, zeta potential ranging from +61.2 mV to -48.8 mV and a product yield of up to 4.7 g can be achieved. Surprisingly, the highest polymerization degree and surface charge are observed in an amino-deficient system.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Applied
Gurjaspreet Singh, Jashan Deep Kaur, Pawan, Priyanka, Mohit, Anita Devi, Sofia Gupta, Yamini Thakur, Kamal Nain Singh
Summary: A library of 2-Amino-4-chlorophenol-based organosilanes were designed and synthesized, and silica nanoparticles loaded with these organosilanes were successfully synthesized. It was found that these organosilanes exhibited selective binding to Cu2+ ions, and the binding could be detected through color and fluorescence changes. The mechanism of the binding and the interaction with a blue copper protein were investigated, providing insights for the design of more potent organosilane analogs.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Engineering, Chemical
Tsaone Gosiamemang, Jerry Y. Y. Heng
Summary: Sodium hydroxide (NaOH) plays an important role in the nucleation of silica nano-particles (SNPs), but little is known about the physicochemical properties and surface modification of the resulting SNPs. By treating SNPs with hydrochloric acid, the sodium ions can be removed and the thermal stability of SNPs can be significantly improved. The surface chemistry of SNPs can be easily modified with octyltrimethoxysilane and octadecyltrimethoxysilane, resulting in super-hydrophobicity and reduced moisture sorption.
Article
Chemistry, Physical
Menglu Li, Nianmin Hong, Jian Jiang, Wenxin Fu
Summary: This study investigated the preparation mechanism of monodispersed hollow silica nanoparticles (HSNs) using a template strategy. It was found that only positively charged polystyrene (PS) templates could induce the deposition of hydrolyzed silicon source and promote the growth of SiO2 shells through the condensation of silanol groups. This research provides detailed insights into the formation process and mechanism of HSNs.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Analytical
Xia Zhang, Jia Gao, Xinyue Wang, Sa Wang, Bo Jiang, Wei Wang, Hui Wang
Summary: In this study, a conventional bright-field imaging technique combined with a series of refractive index standard solutions was used to determine the local refractive index of single particles. The refractive index was found to be independent of particle size, surface roughness, and chemical composition. Additionally, the refractive index of homemade core-shell nanoparticles was accurately tuned by adjusting the ratio of core-to-shell geometry. This simple and effective strategy has extensive applications and potentials in the exploration, design, and optimization of composite photonic crystals, as well as in the fields of reflective displays, optical identification, and encryption.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
He Dong, Yandong Han, Wensheng Yang
Summary: By using tetrabutylammonium hydroxide as a co-catalyst of ammonia in a modified Sto center dot ber method, fractal-like shaped silica particles were successfully prepared. The strong alkalinity of TBAOH promoted the hydrolysis/condensation of TEOS and suppressed electrostatic repulsion among the silica particles, leading to growth following the aggregation-only model.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Spectroscopy
Gurjaspreet Singh, Mohit, Pawan, Sanjay Sharma, Anita Devi, Swati Devi, Richa Yadav, Rakesh Sehgal, Brij Mohan
Summary: Metal ions play important roles in biochemical, industrial, and environmental processes, and there is an urgent need to design and develop new rapid sensing materials with advanced techniques. In this study, a sensor was designed and developed using a facile amalgamation of a pyrene-based organosilane (5) through a click silylation approach to selectively detect Cu2+ ions. Physicochemical and keen methods were employed to characterize the resulting hybrid nanoparticles (H-NPs), which showed strong affinity for Cu2+ ions. Moreover, the identification restrictions of 5 and H-NP towards Cu2+ ions were found to be much lower than the WHO guidelines for drinking water. Additionally, organosilane (5) exhibited good antibacterial and antioxidant activity as evaluated through a molecular docking study with Escherichia coli (IJZQ), showing reasonable docking score and binding energy of -8.40 kcal mol-1.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Inorganic & Nuclear
Pavlo Sivolapov, Oleksiy Myronyuk, Denys Baklan
Summary: Stober synthesis is the most commonly used technique to control the size of SiO2 nanoparticles. In this paper, a series of Stober syntheses in media with different thermodynamic parameters were carried out, and the obtained nanoparticles were characterized using electron microscopy. The results showed that the variation of solvent in Stober synthesis is an effective tool for controlling the particle size of silica. The addition of nonpolar liquids resulted in smaller particles, while an increase in the dispersion and polar parameters of the solvent led to an increase in the size of the resulting SiO2 nanoparticles.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Larissa Brentano Capeletti, Cristiane dos Santos, Zenis Novais da Rocha, Mateus Borba Cardosoc, Joao Henrique Zimnoch dos Santos
SENSORS AND ACTUATORS B-CHEMICAL
(2019)
Article
Chemistry, Applied
Diego Ivan Petkowicz, Marcelo Luis Mignoni, Joao Henrique Z. dos Santos
MICROPOROUS AND MESOPOROUS MATERIALS
(2019)
Article
Chemistry, Physical
Ivo Cacelli, Filippo Lipparini, Leandro Greff da Silveira, Matheus Jacobs, Paolo Roberto Livotto, Giacomo Prampolini
JOURNAL OF CHEMICAL PHYSICS
(2019)
Article
Engineering, Chemical
William Leonardo da Silva, Barbara Caroline Leal, Ana Luiza Ziulkoski, Piet W. N. M. van Leeuwen, Joao Henrique Zimnoch dos Santos, Henri Stephan Schrekker
SEPARATION AND PURIFICATION TECHNOLOGY
(2019)
Article
Polymer Science
Giovani Pavoski, Daniel Luiz Stamm Baldisserotto, Thuany Maraschin, Luiz Fernando Wentz Brum, Cristiane dos Santos, Joao Henrique Zimnoch dos Santos, Adriano Brandelli, Griselda Barrera Galland
EUROPEAN POLYMER JOURNAL
(2019)
Article
Chemistry, Physical
Marcius A. Ullmann, Joao H. Z. dos Santos
JOURNAL OF CATALYSIS
(2019)
Article
Chemistry, Physical
Arthur A. Bernardes, Guilherme L. Scheffler, Claudio Radtke, Dirce Pozebon, Joao H. Z. dos Santos, Zenis N. da Rocha
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2020)
Article
Green & Sustainable Science & Technology
Jaqueline Benvenuti, Adriano Giraldi Fisch, Joao Henrique Zimnoch Dos Santos, Mariliz Gutterres
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2020)
Article
Materials Science, Multidisciplinary
Silvia R. S. Rodrigues, Viviane Dalmoro, Joao H. Z. dos Santos
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2020)
Article
Chemistry, Applied
Alan dos Santos da Silva, Zenis Novais da Rocha, Marcelo Luis Mignoni, Joao Henrique Z. dos Santos
MICROPOROUS AND MESOPOROUS MATERIALS
(2019)
Article
Chemistry, Physical
Alan dos Santos da Silva, Paolo Roberto Livotto, Joao Henrique Z. dos Santos
APPLIED SURFACE SCIENCE
(2020)
Article
Chemistry, Multidisciplinary
Wesley F. Monteiro, Michele O. Vieira, Eduardo F. Laschuk, Paolo R. Livotto, Sandra M. O. Einloft, Michele O. de Souza, Rosane A. Ligabue
JOURNAL OF CO2 UTILIZATION
(2020)
Article
Biochemical Research Methods
Vinicius Esteves Teixeira, Paolo Roberto Livotto
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
(2020)
Article
Materials Science, Textiles
Victoria Vieira Koop, Cristiane Dos Santos, Joao Henrique Zimnoch Dos Santos, Mariliz Gutterres
JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS AND CHEMISTS
(2020)
Article
Engineering, Environmental
Jaqueline Benvenuti, Adriano Fisch, Joao Henrique Zimnoch dos Santos, Mariliz Gutterres
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2019)
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.