Article
Chemistry, Multidisciplinary
Zhuoga Cirena, Yu Nie, Yanfang Li, Huilin Hu, Xiang Huang, Xin Tan, Tao Yu
Summary: 30% FeCN/ZIS composite with high photocatalytic activity for chromium-containing wastewater treatment was synthesized through in-situ growth of well-dispersed ZnIn2S4 nanosheets on the Fe doped g-C3N4 surface. The optimized 30% FeCN/ZIS exhibited significantly enhanced photoreduction of Cr(VI) compared to pure ZnIn2S4 and 30% FeCN, thanks to the intense synergy between the Fe-Nx bond and close interface contact, which facilitated high-speed charge transfer and improved optical carrier separation efficiency. Additionally, iron doping narrowed the bandgap of g-C3N4 and prevented electron-hole pair recombination, as confirmed by UV-vis diffuse reflection spectra and photoluminescence spectroscopy.
CHINESE CHEMICAL LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Changwoo Kim, Siyuan An, Junseok Lee, Anushree Ghosh, Mingjiang Zhong, John D. Fortner
Summary: The application of positively charged polymers, such as polyethylenimine (PEI), has shown significant potential for the sorption and reduction of hexavalent chromium Cr(VI). The study demonstrates that the photoactive nature of PEI enhances Cr(VI) photoreduction, with the efficiency being dependent on the density of amine groups. When combined with graphene oxide (GO) as a stabilizing scaffold, the performance for Cr(VI) treatment is influenced by the mass loading of PEI, its molecular weight, and the oxidation extent of GO. Furthermore, combining PEI with magnetic nanomaterials allows for low-energy, high-efficiency separation and reuse, showing excellent performance over multiple cycles.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Wei Mo, Yang Yang, Chunyan He, Yuhua Huang, Jinpeng Feng
Summary: In this study, Mg-Al-Fe ternary metal oxides (MAF-LDOs) obtained by the calcination of Mg-Al-Fe hydrotalcite-like compounds (MAF-LDHs) showed great potential for the treatment of Cr(VI)-containing wastewater. The mechanism of Cr(VI) adsorbed by MAF-LDOs involved a memory effect and reduction to Cr(III). MAF-LDOs exhibited a simple synthesis process, superior adsorption capacity, stability, and reusability, making it suitable for industrial wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Applied
Mojtaba Safaviyan, Mehdi Faramarzi, Seyed Aboutaleb Mousavi Parsa, Hajir Karimi
Summary: In this study, a novel Cr(VI) adsorbent, TEPA-enriched MGO, was developed and characterized. The optimal parameters for Cr(VI) sorption, including Cr(VI)/MGOT ratio, temperature, and pH, were determined through Box-Behnken Design. The maximum adsorption capacity was found to be 287.15 mg/g. The Lagergren kinetic and Langmuir isotherm models accurately represented the adsorption process on MGOT. Based on the obtained results, MGOT was identified as an excellent reusable adsorbent for selective Cr(VI) sorption and magnetic separation from wastewater.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Materials Science, Multidisciplinary
Amir Bahram Gharagozloo Bahrami, Seyed Hajir Bahrami, Saeed Saber-Samandari, Elaheh Kowsari
Summary: In this article, graphene oxide (GO) was produced and modified multiple times to achieve electromagnetic absorption. The synthesized materials were characterized and the modified reduced graphene oxides showed improved electromagnetic absorption. By adding the specimens to an epoxy matrix with different concentrations and thicknesses, the optimum conditions for maximum electromagnetic absorption were determined. Increasing the concentration and thickness of the specimens resulted in increased electromagnetic absorption in the desired microwave wavelengths (2-12 GHz).
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Jing Li, Mingjie Fan, Ziting Yuan, Fang Liu, Miao Li
Summary: This study explores a facile method for decorating reduced graphene oxide (rGO) with ultrathin nanosized zero-valent iron (nZVI) in order to develop an effective tool for detoxication of hexavalent chromium (Cr(VI)). The addition of copper (Cu) particles in these composites enhances electron-transfer, improving the reaction rate. Experimental results indicate that under acidic conditions and in the presence of Cu and rGO, the treatment capacity is enhanced.
Article
Engineering, Environmental
Fengfeng Zhou, Qiangling Liu, Yaxin Qin, Wei Liu, Lizhi Zhang
Summary: In this study, L-cysteine was successfully modified on zero-valent iron (ZVI) through a mechanical ball-milling method, leading to improved surface functionality and enhanced removal efficiency of Cr(VI). The modified C-ZVIbm showed a significantly higher Cr(VI) removal efficiency of 99.6% compared to ZVIbm (7.3%) within 30 minutes. The surface characterization revealed the formation of a-COO-Fe complex through specific adsorption of Cys on the oxide shell. The adsorption process followed the Freundlich isotherm and pseudo-second-order kinetic model. Electrochemical and spectroscopic analysis demonstrated that Cys facilitated the Fe(III)/Fe(II) cycling on the surface of C-ZVIbm, resulting in the reduction of Cr(VI) to Cr(III).
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Taiba Naseem, Fozia Bibi, Saira Arif, Muhammad Waseem, Sirajul Haq, Mohamad Nor Azra, Taavi Liblik, Ivar Zekker
Summary: The study utilized rGO-ZnO for removing Cr (VI) from aqueous medium, which was found to be more economical and promising than GO. The adsorption kinetics followed the pseudo-first-order model, while the equilibrium study showed that the non-linear Langmuir model was a better fit. The calculated maximum adsorption capacities for GO and rGO-ZnO nanocomposite were 19.49 mg/g and 25.45 mg/g, respectively, with endothermic and spontaneous nature of adsorption detected.
Article
Engineering, Environmental
Jun Shang, Yanni Guo, Deliang He, Wei Qu, Yining Tang, Lei Zhou, Rilong Zhu
Summary: The novel graphene oxide-dicationic ionic liquid composite (GO-DIL) showed good adsorption performance for Cr(VI), with a high maximum adsorption capacity and maintained high adsorption capacity even after multiple cycles. The adsorption process fit well with pseudo-first-order kinetic model and Langmuir model, indicating that adsorption is a spontaneous endothermic process.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Junjie Chen, Hui Wu, Guodong Sheng, Hui Li, Manli Li, Xiaojie Guo, Hongliang Dong
Summary: In this study, graphene oxide (GO) was found to mediate the reduction of U(VI), Re(VII), Se(VI), and Se(IV) in aqueous Fe(II) solution. The enhanced reduction effects of GO were attributed to facilitated electron transfer and decreased redox potential. The presence of dissolved fulvic acid (FA) significantly promoted GO-mediated reduction. GO plays an important role in mediating the reductive immobilization of radionuclides in redox-stratified environments.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Yating Luo, Jingli Pang, Cheng Peng, Jien Ye, Bibo Long, Jianhao Tong, Jiyan Shi
Summary: This study developed a synergistic system of P. oxalicum SL2-nZVI for Cr(VI) remediation, which effectively removed Cr(VI) mainly through extracellular nonenzymatic reduction. P. oxalicum SL2 exhibited iron precipitate solubilization and Fe(II) regeneration capabilities, and iron ions generated by nZVI also stimulated Cr(VI) reduction by organic acids secreted by P. oxalicum SL2. Overall, the P. oxalicum SL2-nZVI synergistic system shows promise for regenerating Fe(II) while reducing Cr(VI).
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Linlin Cui, Ling Fan, Zhanfei Li, Junjun Wang, Ran Chen, Yejuan Zhang, Jinju Cheng, Xueling Wu, Jiaokun Li, Huaqun Yin, Weiming Zeng, Li Shen
Summary: The absence of EPS on the cell surface of cyanobacteria reduces the adsorption amount to heavy metal ions, with heavy metal ions interacting with polysaccharides before proteins on cyanobacteria cells.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Junjie Geng, Qianwei Liang, Wenyi Yu, Wei Chen, Guining Lu, Hanjin Luo
Summary: This study reports the use of nitrogen-enriched lignosulfonate exfoliated graphene oxide (NLEGO) as an efficient adsorbent for the removal of hexavalent chromium (Cr(VI)) from aqueous solution. The experimental results show that NLEGO has a strong adsorption capacity for Cr(VI) and can meet the industrial wastewater discharge standards. Density functional theory (DFT) simulations suggest that the adsorption mechanism of Cr(VI) on NLEGO involves electrostatic attraction, reduction, and surface chelation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Yunquan Liu, Huimei Shan, Chunya Zeng, Hongbin Zhan, Yanyue Pang
Summary: In this study, alpha-FeO(OH)/GOCS microspheres were prepared and used for the removal of Cr(VI) from aqueous solutions. The effects of various factors on the adsorption process were investigated, and it was found that pH, mass and volume ratio, coexisting ions, time, temperature, and initial concentration of Cr(VI) all influenced the removal efficiency. The equilibrium adsorption capacity of Cr(VI) was found to be 24.16 mg/g, and the removal rate was 97.69% under specific experimental conditions. The adsorption process followed a pseudo-second-order kinetic model and was spontaneous and endothermic. No secondary pollution of Fe was observed during the Cr(VI) adsorption process.
Article
Electrochemistry
Long Chen, Yubo Liu, Shaohui Zhang
Summary: Electrochemical reduction using a stainless steel (SS) electrode modified with graphene is used for efficient removal of Cr(VI) in wastewater.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Rajalaxmi Sahoo, C. Reshma, D. S. Shankar Rao, C. V. Yelamaggad, S. Krishna Prasad
Summary: This study investigates the influence of the flexible spacer parity of a guest photoactive liquid crystalline dimer on the photonic bandgap features of the cholesteric and twist grain boundary smectic C phases of the host molecule. The results show that the parity of the photoactive dimer affects the width of the photonic bandgap and the blue-shift of the cholesteric phase. Additionally, the parity of the dimer also affects the layer spacing and two-dimensional periodicity of the liquid crystalline phases.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Sara Rozas, Alberto Gutierrez, Mert Atilhan, Alfredo Bol, Santiago Aparicio
Summary: This study presents a multiscale theoretical investigation on the use of bifunctional hydrophobic Deep Eutectic Solvent for carbon capture using tetrapropylammonium chloride, acetic acid, and ethanolamine. The characterization includes nanoscale analysis of CO2 absorption mechanisms and changes in liquid phase properties during gas capture.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Tabouli Eric Da-yang, Alhadji Malloum, Jean Jules Fifen, Mama Nsangou, Jeanet Conradie
Summary: In this study, the potential energy of different glycine tautomers and their interaction with Cu2+ cations was investigated. The results showed that the solvation medium and the presence of Cu2+ cations influenced the stability of glycine tautomers.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Xiaoliang Gou, Nan Ye, Qingqing Han, Junjie Cui, Long Yi Jin
Summary: In this study, amphiphilic rod-coil molecules with rigid DSA parts and flexible oligoether chains were designed and their assembly capacities were investigated. The morphology of the molecular aggregates was influenced by the pH of the solution and UV light, and the aggregates showed adsorption capacity for nitroaromatic compounds.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Shuang Liu, Liyan Shan, Cong Qi, Wenhui Zhang, Guannan Li, Bei Wang, Wei Wei
Summary: Optimizing the design of styrene-butadiene-styrene copolymer (SBS) is crucial for producing cost-effective SBS modifiers and improving road quality. This study examined the influence of SBS content and molecular structure on viscosity and compatibility. The results showed that the viscosity contribution of SBS is determined by its molecular structure and phase morphology.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Artem A. Petrov, Ekaterina A. Titova, Aydar A. Akhmadiyarov, Ilnaz T. Rakipov, Boris N. Solomonov
Summary: This work focuses on the thermochemistry of solvation of azeotropes. The enthalpies of dissolution of azeotropes in different mediums were determined, and the impact of the structure of the azeotropes on their properties in solution was discussed. A correlation between enthalpies of solvation and molar refraction was used to determine the vaporization enthalpies of azeotropes for the first time. The results were found to be consistent with literature data, obtained using direct and calculated methods. These findings contribute to the analysis of the structure-property relationships of azeotropes.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
L. V. Kamaeva, E. N. Tsiok, N. M. Chtchelkatchev
Summary: Understanding the correlations between liquids and solids allows us to predict the thermodynamic parameter range favorable for the formation of intriguing solid phases by studying liquids. In this study, we experimentally and theoretically investigated an Al-Cu-Co system within different composition ranges, and identified high-temperature solid phases. Our findings demonstrated the correlation between the boundaries of different solid phases and undercooling and viscosity in the concentration area.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
R. Aneesh Kumar, S. Jamelah Al-Otaibi, Y. Sheena Mary, Y. Shyma Mary, Nivedita Acharjee, Renjith Thomas, Renjith Raveendran Pillai, T. L. Leena
Summary: In this study, the interactions between doped and pristine coronenes and adenine nucleobases were investigated using Density Functional Theory. The optimal configurations, adsorption energies, charge transfer, and electrical properties of each complex were calculated. It was found that doped coronene had stronger adsorption strength and charge transfer compared to pristine coronene. The stability of the complexes was attributed to non-covalent interactions in the interactive region. The change in electrical conductivity of coronenes after adsorption suggested their sensitivity towards DNA bases. The predicted energy gap and prolonged recovery time for adenine-coronene configurations indicated the potential application of pristine/doped coronene in DNA detection.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Gang Zhou, Yongwei Liu, Biao Sun, Zengxin Liu, Cuicui Xu, Rulin Liu, Qi Zhang, Yongmei Wang
Summary: The CFD-DEM method was used to simulate the dust deposition pattern in the bronchus of anchor digging drivers, revealing the highest dust concentration in the vortex region of the working face. The study also found a positive correlation between dust particle diameter and bronchial deposition rate, and a negative correlation with alveolar deposition rate.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Yan Zhang, Yafei Luo, Lingkai Tang, Mingyan E, Jianping Hu
Summary: This study investigates the effects of different transition metal decorations on B12N12 nanocages on the adsorption properties of nitrosourea drugs using computational methods. The results reveal the presence of weak non-covalent interactions between metals and nanocages, and the interaction between drugs and nanocages plays a significant role in drug adsorption. Compared to free drugs, the adsorption of drugs on nanocages can facilitate electron transfer, reduce energy gaps and chemical hardness, indicating activity at the target site.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
C. I. Alcolado, J. Poblete, L. Garcia-Rio, E. Jimenez, F. J. Poblete
Summary: In this study, the selective oxidation of aromatic aldehydes was investigated using Ru(VI) as a catalyst and hexacyanoferrate (III) as a cooxidant in an alkaline medium. The reaction mechanism involves complex reaction orders for the oxidant and the aromatic aldehyde, while the reaction order for Ru(VI) is one. The proposed mechanism includes two catalytic cycles and the formation and decomposition of complexes. Quantitative structure-activity relationship analysis showed that deactivating groups in the para-position enhance the process.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Inez A. Barbieri, Marcos L. S. Oliveira, Franciele S. Bruckmann, Theodoro R. Salles, Leonardo Zancanaro, Luis F. O. Silva, Guilherme L. Dotto, Eder C. Lima, Mu. Naushad, Cristiano R. Bohn Rhoden
Summary: This study evaluated the adsorption of zolpidem on magnetic graphene oxide and synthesized magnetic graphene oxide adsorbents for zolpidem removal. The best magnetic nanoadsorbent was found to have a removal percentage of 87.07% at specific pH and temperature conditions. The results suggest that the removal of zolpidem is related to the surface chemistry of the adsorbent rather than the surface area of graphene oxide. The adsorbent showed excellent adsorption efficiency and magnetic behavior, making it a promising material for removing zolpidem from aqueous solutions.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Hongyan Huang, Chunquan Li, Siyuan Huang, Yuling Shang
Summary: This study examines the sensitivity of the thermal conductivity of water-based alumina nanofluids to changes in concentration, sphericity, and temperature. The results show that volume fraction and temperature have a significant impact on the thermal conductivity, while sphericity also needs to be considered. A support vector machine regression model was created to analyze the sensitivity of the thermal conductivity to different parameters. The findings indicate that temperature, sphericity, and volume fraction are the most sensitive variables.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Correction
Chemistry, Physical
V. M. Pergamenshchik, T. Bryk, A. Trokhymchuk
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Valentyn Rudenko, Anatolii Tolochko, Svitlana Bugaychuk, Dmytro Zhulai, Gertruda Klimusheva, Galina Yaremchuk, Tatyana Mirnaya, Yuriy Garbovskiy
Summary: This paper reports on the synthesis, structural characterization, spectral and nonlinear-optical properties of glass nanocomposites made of glass forming ionic liquid crystals and nanoparticles. The study reveals that by exciting the nanocomposites within their absorption band, a control over effective optical nonlinearities can be achieved, allowing the modification of the magnitude and sign of the effective nonlinear absorption coefficient. The proposed strategy using metal-alkanoates based glass-forming ionic liquid crystals and nanoparticles shows great potential for the development of nanophotonics and plasmonics technologies.
JOURNAL OF MOLECULAR LIQUIDS
(2024)