Article
Chemistry, Physical
Hao Zhang, Shan Qing, Qihao Gui, Xiaohui Zhang, Aimin Zhang
Summary: The study showed that Tetramethylammonium hydroxide and 3-aminpropyltriethoxysilane treatment can enhance the dispersion stability of TiO2/water nanofluids. Increasing nanoparticle concentration leads to higher viscosity of nanofluids, while temperature rise results in decreased viscosity. The thermal conductivity and effective thermal conductivity of nanofluids increase with temperature and nanoparticle concentration.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Multidisciplinary
Adnan Qamar, Zahid Anwar, Hassan Ali, Shahid Imran, Rabia Shaukat, Muhammad Mujtaba Abbas
Summary: Metal-oxide based nanofluids have attracted attention for their superior dispersion stability and enhanced thermophysical properties. This study experimentally investigated the dispersion stability and thermophysical properties of well-dispersed zinc oxide nanoparticles in deionized water, finding that viscosity and thermal conductivity increased with increasing nanoparticle loading.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Shikha A. Ebrahim, Emil Pradeep, Sayantan Mukherjee, Naser Ali
Summary: This study experimentally investigates the effects of temperature and nanoparticle concentration on dynamic viscosity. Diluted water-based graphene nanoplatelets (GNP) nanofluids are prepared with concentrations ranging from 0.00005 to 0.001 vol.%. Surfactants such as Gum Arabic (GA) and Sodium dodecyl sulfate (SDS) are dispersed in the nanofluid medium. The study finds that viscosity increases with nanoparticle concentration and decreases with temperature, and a regression model with high prediction accuracy is developed.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Abdul Rehman, Sana Yaqub, Majid Ali, Hassan Nazir, Nadia Shahzad, Sehar Shakir, Rabia Liaquat, Zafar Said
Summary: This study investigates the influence of eight surfactants on the properties of hybrid nanofluids containing Aluminum oxide (Al2O3) and Titanium dioxide (TiO2). The results show that polyvinylpyrrolidone (PVP) exhibits the highest stability among all surfactants, while polyethylene glycol (PEG) shows the highest viscosity enhancement. Additionally, all the nanofluids exhibit Newtonian behavior. The study emphasizes the potential of PVP as a surfactant for long-term heat transfer applications.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Review
Thermodynamics
Adnan Qamar, Zahid Anwar, Hassan Ali, Rabia Shaukat, Shahid Imran, Attique Arshad, Hafiz Muhammad Ali, Theodosios Korakianitis
Summary: This review article critically analyzes the preparation and dispersion stability of aqueous metal oxide nanofluids, discussing general preparation and stabilization methods, types of instruments for stability inspection, as well as factors affecting stability. The article also explores the current research needs and possible solutions to challenges in exploring uniformly dispersed nanofluids under optimized operating conditions, providing insight into future research directions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Chemical
Hao Zhang, Shan Qing, Yuling Zhai, Xiaohui Zhang, Aimin Zhang
Summary: The study found that TiO2/water nanofluids are more stable when further away from the isoelectric point. Dynamic viscosity is closely related to stability, while thermal conductivity depends on the degree of aggregation. Additionally, there are differences in thermal conductivity of nanofluids at different pH levels.
Article
Engineering, Chemical
Jiajie Lei, Zhumei Luo, Shan Qing, Xiaoyan Huang, Fuyu Li
Summary: In this study, the stability, rheological behavior, and thermal conductivity of Fe3O4 nanofluids were investigated. The experimental results showed that TMAH had the best stability, with the optimal mass ratio of Fe3O4 to TMAH being 1:4. PVP had the greatest effect on the viscosity of nanofluids, while SDS had the greatest effect on thermal conductivity.
Article
Multidisciplinary Sciences
Brian Reding, Mohamed Khayet
Summary: Carbon based nanofluids (CbNFs) have exceptional characteristics and are used in various advanced heat transfer and cooling technologies. It has been found that by adding C-60, these nanofluids can significantly improve the performance of base working fluids, although the thermal conductivity may decrease slightly with increasing temperature.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Manuela Lechuga, Mercedes Fernandez-Serrano, Francisco Rios, Alejandro Fernandez-Arteaga, Ramon Jimenez-Robles
Summary: The presence of silica nanoparticles in nanofluids has been found to affect the performance of surfactants, reducing their ability to decrease surface tension and decreasing the biodegradability of binary mixtures. These findings are useful for studying the behavior of nanofluids in aquatic environments and selecting nanofluids with low environmental impact.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Analytical
Andre Leesment, Sigrid Selberg, Merili Tammiste, Anh Hai Vu, Thuong Hoai Nguyen, Luke Taylor-King, Ivo Leito
Summary: This study discusses the acidity of lipophilic compounds in systems consisting of an aqueous phase and an organic phase. The research shows that approximations using aqueous pK(a) values can lead to seriously biased estimations of acidities. By applying the concept of biphasic pK(a), a more accurate description of acidities is provided in this work.
ANALYTICAL CHEMISTRY
(2022)
Article
Energy & Fuels
Mingwei Zhao, Yiming Zhang, Wei Wu, Yongquan Sun, Zhongzheng Xu, Yucheng Zhang, Caili Dai
Summary: Nanomaterials have been widely used in oilfields and have attracted more attention. However, there are few studies on the effect of ultralow interfacial tension (IFT) on nanofluid imbibition. In this work, nanofluids with ultralow oil-water IFT were screened and their role in imbibition recovery was studied. The experimental results show that ultralow IFT can make the static imbibition of nanofluids reach equilibrium more quickly, but its performance in improving imbibition recovery is limited.
Review
Thermodynamics
Faraz Afshari, Eyuphan Manay, Shabnam Rahimpour, Bayram Sahin, Burak Muratcobanoglu, Reza Teimuri-Mofrad
Summary: This study comprehensively reviews the research on nanofluid stability. The study finds that parameters such as acidity level, nanoparticle material, ultrasonication, surfactants, base fluid type, nanoparticle concentration, and surface modification of nanoparticles all have important effects on nanofluid stability.
HEAT TRANSFER RESEARCH
(2022)
Article
Food Science & Technology
Mareike Krell, Franziska S. Hanschen, Sascha Rohn
Summary: This study aimed to evaluate the potential increase in isothiocyanates (ITC) formation in Brassicaceae-enriched bread while minimizing ITC-protein conjugates. The results showed that pH values of the bread influenced the degradation of glucosinolates (GLS), but there was no significant correlation between pH values and BITC content in model breads. The baking process significantly reduced the ITC content, but the degradation products and BITC-Lys conjugates were stable during storage in the bread matrix itself.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Jinjian Hou, Lingyu Sun
Summary: This study demonstrated the synergistic effect of using nanofluids and surfactants to enhance oil recovery from carbonate asphalt rocks. Nanofluids rendered the oil-wet calcite surface hydrophilic, while surfactants aided in the release of heavy oil. The combined use of nanofluids and surfactants resulted in altered wettability of the oil-wet calcite surface.
Article
Chemistry, Multidisciplinary
Martin Reifarth, Marek Bekir, Alain M. Bapolisi, Evgenii Titov, Fabian Nusshardt, Julius Nowaczyk, Dmitry Grigoriev, Anjali Sharma, Peter Saalfrank, Svetlana Santer, Matthias Hartlieb, Alexander Boeker
Summary: A cationic surfactant with a spiropyrane unit was prepared, demonstrating adjustable surface-active characteristics with dual responsiveness. The reversible conversion of the spiropyrane unit to a zwitterionic merocyanine was controlled by adjusting pH value and light, resulting in pH-dependent photoactivity. The underlying switching processes were investigated and a thermodynamic explanation was provided. The complex stimuli-responsive behavior enables remote-control of colloidal systems and can be applied in pH-dependent manipulation of oil-in-water emulsions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Correction
Chemistry, Physical
Chen Luo, Yan Shao, Hua Yu, Hong-zhi Ma, Yu-hao Zhang, Long Gu, Bo Yin, Ming-bo Yang
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Stefano Borocci, Armando Camerlingo, Felice Grandinetti, Maria Rutigliano, Nico Sanna
Summary: The complexes of He, Ne, Ar, Kr, and Xe with B3N3H6 were investigated using MP2, CCSD(T), and SAPT ab initio methods. The complexes can be described as mono-, di-, and tri-coordinated to the N atoms, with stability following the order N-mono < N-di < N-tri. The interactions are dominated by dispersion and the binding energies are within the range of 1 or 2 kcal mol(-1). The results were compared with a recent DFT study on larger BN sheets complexes [Phys. Chem. Chem. Phys. 24 (2022) 2554-2566.].
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
V. Nagarajan, R. Bhuvaneswari, R. Chandiramouli
Summary: In this study, stable phosphoborane was used as a sensor to detect isobutane and n-propane in Liquefied Petroleum Gas (LPG). Phosphoborane demonstrated structural stability and semiconducting nature, and exhibited promising adsorption properties for the LPG molecules.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Xiaoxi Xu, Zijiang Yang, Bayaer Buren, Maodu Chen
Summary: In this study, the time-dependent wave packet method was used to investigate the reaction channels and mechanisms of Ca+ + HD. The results show that the CaH+ + D reaction channel plays a primary role, which is consistent with experimental results. Complex forming and direct-abstraction reaction mechanisms exist in this reaction process.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Keshab Pandey, Hae Kyung Jeong
Summary: A free-standing silicon-carbon nanofiber composite film was synthesized and investigated for supercapacitor applications. It exhibited high specific capacitance, energy density, and power density. After 5000 cycles, the film showed excellent specific capacitance retention and Coulombic efficiency.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Xinyu Zhang, Haosong Li, Xiaoyu Cao, Jing Gao, Yong Wei, Jianzhuo Zhu
Summary: The evaporation behavior of nanosized water aggregations on two-dimensional electroneutral solid surfaces with different surface polar unit densities was investigated. The results showed that the evaporation rate changes non-monotonically with the surface polar unit density, and the minimum evaporation rate is obtained when the surface has a modest surface polar unit ratio of 66.7%.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Yanyan Xu, Rui Dai, Xiaojie Wang, Zhijun Qiao, Haowei Wen, Dianbo Ruan, Yuzuo Wang
Summary: This article presents an innovative solvothermal sodium insertion method for synthesizing Triphylite-NaFePO4, which demonstrates optimal electrochemical performance in sodium-ion batteries.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Meiyi Jiang, Kun Yang, Yancheng Liu, Li Yao
Summary: The geometric structure and electronic properties of transition metal M (M = Cu, Fe, Mn)-TiO2 (101) surface adsorbed by NO2 and N2O were calculated by density functional theory (DFT) and DFT + U theory. The results showed that the adsorption of NO2 and N2O on Mn and Fe atoms is more stable, and a large number of active electrons are formed around these atoms, facilitating the catalytic reactions.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Sergey A. Vyrko, Yulia G. Polynskaya, Nikita A. Matsokin, Andrey M. Popov, Andrey A. Knizhnik, Nikolai A. Poklonski, Yurii E. Lozovik
Summary: In this study, carbon nanobracelets, which are cyclic molecules composed of alternating polycyclic regions and double carbon chains, were investigated using spin-polarized density functional theory. The results show that carbon nanobracelets with odd number of monomers exhibit distinct electronic energy levels, band gaps, and carbon chain deformation compared to those with even number of monomers.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Chanchan Wang, Quan Yang, Yanzhi Ding, Xiaoyong Lu, Dong Tian
Summary: It has been found that the introduction of buffer layers improves the electrical performance of solid oxide fuel cells (SSOFCs). In this study, varying ratios of Gd-doped CeO2 were used as buffer layers in YSZ-based SSOFCs. The results demonstrate that the performance of SSOFCs is enhanced when a buffer layer is added, with the highest performance achieved using Ce0.8Gd0.2O2-delta (GDC20) as the buffer layer. This suggests that the use of GDC series buffer layers is an attractive strategy to optimize performance loss due to electrolyte-electrode interactions.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Wang Li, Yi-Fan Zhang, Jia-Bin Huang, Chang-Yang Wang, Feng Zhang, Jiu-Zhong Yang, Long Zhao
Summary: The gas-phase reaction of propargyl with vinylacetylene was investigated using synchrotron photoionization and molecular-beam mass spectrometry methodologies. The formation mechanisms of the resulting cyclic structures were examined using quantum computations. Two previously unidentified isomers were detected and identified for the first time.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Avijit Pramanik, Sanchita Kundu, Olorunsola Praise Kolawole, Kaelin Gates, Paresh Chandra Ray
Summary: This study investigates the influence of aspect ratio and quantum confinement on the single-photon and two-photon absorption cross-section of perovskite CsPbI3 nanorods. Experimental data shows that CsPbI3 nanorods have an extremely high two-photon absorption cross-section, significantly surpassing organic chromophores and other CsPbBr3 nanocrystals. Moreover, adjusting the aspect ratio can significantly enhance the absorption ability. Additionally, the study also reveals a moderate quantum confinement effect on the single-photon and two-photon absorption cross-section of the nanorods.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Hyon-Tae Pak, Jin-A Choe, Kyong-Sik Ju, Yong -Son Rim
Summary: Drug-loaded cellulose diacetate (CDA) membranes were prepared using different compositions of mixed solvent. The microstructure and performance of the membranes were investigated, and a method to predict drug release properties was proposed. The results showed that the composition of the mixed solvent significantly affected the overall performance of CDA membranes, and the release rates of drugs were related to Δdelta and the intrinsic viscosity of CDA.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Gabriella E. Ravin, E. Curotto
Summary: We have developed a systematic approach to optimize the training set sizes for neural networks in fitting ab initio potential energy surfaces. Using this approach, we have constructed several spectroscopic quality potential energy surfaces for [Li(H2)n]+, n = 1 - 9. The ground state properties have been computed for all the systems and selected states.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Guohua Xu, Lei Xu, Feng Zhang, Chunling Yu, Yu Song
Summary: NiS1.03@Ni7S6/carbon composite was successfully prepared using corn stalk as a carbon source via a simple adsorption-sulphurization process. The composite exhibited a specific capacitance of 1554.6 F/g at 1 A/g as a supercapacitor electrode, with a capacitance retention rate of 80.4% after 5000 cycles. Furthermore, the NiS1.03@Ni7S6/carbon//AC asymmetric supercapacitor showed a high energy density of 41.2 Wh kg-1 at a power density of 750 W kg-1, and excellent cycling stability with 86.8% capacitance retention after 10,000 cycles.
CHEMICAL PHYSICS LETTERS
(2024)