Article
Chemistry, Multidisciplinary
Huidong Shen, Chunming Yang, Wenwen Xue, Leiduan Hao, Danjun Wang, Feng Fu, Zhenyu Sun
Summary: A Bi2O3/(BiO)(2)CO3/Bi2MoO6 ternary heterojunction was constructed and used as a photocatalyst for the degradation of phenol. The optimized heterojunction exhibited considerable activity for phenol photodegradation with a removal efficiency of 98.8% and a total organic carbon (TOC) degradation rate of 68% under visible-light irradiation. This work provides a potential strategy to fabricate highly efficient Bi-based Z-scheme photocatalysts with wide application prospects in solar-to-fuel conversion and environmental protection.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Physics, Multidisciplinary
Shiue-Yuan Shiau, Monique Combescot
Summary: This article discusses the formation and properties of Wannier excitons and Frenkel excitons in semiconductors. Wannier excitons are made from delocalized electrons and holes, while Frenkel excitons are made from highly localized excitations. The article also presents a new approach to studying Frenkel excitons and highlights the importance of understanding the spin and spatial degeneracies of excitonic states.
Article
Chemistry, Multidisciplinary
Ji-Ping Jia, Yu-Lu Zhang, Jin-Yu Gou, Yi-Xuan Zhang, Yu-Ke Dai, Hong-Hua Ge, Yu-Zeng Zhao, Xin-Jing Meng
Summary: A Ti/SnO2-Sb-Cu-Zn electrode was prepared for electrocatalytic oxidation of AR18. Adding Zn to the coating improved the surface morphology and roughness, while Cu-Zn co-doping increased the number of active sites and enhanced the electrocatalytic activity of the electrode.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Physics, Multidisciplinary
Michael F. Wondrak, Walter D. van Suijlekom, Heino Falcke
Summary: This paper presents a new approach to black hole evaporation using a heat-kernel approach analogous to the Schwinger effect. By applying this method to a massless scalar field in a Schwarzschild spacetime, the authors demonstrate that spacetime curvature plays a role similar to the electric field strength in the Schwinger effect. The results are interpreted as local pair production in a gravitational field, and a radial production profile is derived. The emitted particles peak near the unstable photon orbit, and the effects of particle number and energy flux are found to be comparable to the Hawking case. However, the pair production mechanism itself does not explicitly rely on the presence of a black hole event horizon.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Nuclear
K. Hagino, H. Sagawa
Summary: This study investigates the spatial correlation of a particle-hole pair in the isovector channel in Co-56 and K-40 nuclei using the Hartree-Fock+Tamm-Dancoff approximation with the Skyrme interaction. The results show a significant concentration of the two-body density at positions where the neutron particle and proton hole states are located opposite to each other with respect to the core nucleus in the isovector channel.
Article
Environmental Sciences
Yu Pu, Fan Zhao, Yini Chen, Xiangyu Lin, Haoran Yin, Xinhua Tang
Summary: In this study, SnO2-Sb2O3/GAC particle electrodes were prepared using the dip-calcination method and were characterized by various techniques. The particle electrodes exhibited high electrocatalytic activity and thermal stability. The effects of various factors on the performance of phenol degradation were investigated, and the results showed significant removal rates of phenol and COD under optimal conditions. Additionally, the novel particle electrodes demonstrated stable and high-efficiency operation for at least 15 cycles, highlighting their robustness and durability.
Article
Chemistry, Physical
Na Ji, Alazar Alemayehu, Hanyang Li, Poknam Ri, Xinyong Diao
Summary: This study successfully used nickel sulfide as a catalyst for the demethylation of anisole, achieving a high yield of phenol (95.6%) at a relatively low reaction temperature. Through comprehensive characterization and experiments, it was found that the strong metal-support interaction between nickel sulfide and alumina support on the catalyst facilitated the dispersion of nickel sulfide and enhanced the demethylation activity.
MOLECULAR CATALYSIS
(2023)
Article
Materials Science, Ceramics
Fanyong Yan, Yao Wang, Chunhui Yi, Jinxia Xu, Bowei Wang, Ran Ma, Ming Xu
Summary: Composite photocatalysts with broad spectral response and efficient separation of photoinduced carriers were synthesized by installing CDs on the surface of three-dimensional hollow microsphere nanophotocatalyst Bi2WO6 using the hydrothermal approach. The higher photocatalytic capability of 0.5% CDs/Cl-Bi2WO6 was observed in the degradation procedure, attributed to the doping of Cl and the presence of CDs enhancing visible light capture and suppressing electron-hole pair complexation. Scavenger-quenching assays confirmed the involvement of h(+), center dot OH, and center dot O-2(-) as the primary actors in the degradation process. A feasible degradation mechanism for trichloroethylene was proposed. This study presents a novel concept for the effective degradation of organic pollutants using composite nanophotocatalysts.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
G. Lioliou, A. M. Barnett
Summary: The ultimate conversion efficiency of semiconductor radioisotope microbatteries is determined by the average energy consumed in creating an electron-hole pair. Recent experimental measurements have led to a refined relationship that suggests higher achievable efficiencies than previously expected, opening up new possibilities for applications in various fields. This challenges the traditional assumptions and highlights the need to reconsider the use of the Klein relationship in all related fields.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Astronomy & Astrophysics
Andres Anabalon, Sasha Brenner, Gaston Giribet, Luciano Montecchio
Summary: The study examines accelerated black hole horizons with and without defects, showing that these geometries exhibit an infinite set of symmetries in their near horizon region and deriving the associated conserved charges through transformations. It also considers other physical scenarios, including accelerated black holes in anti-de Sitter and binary black hole systems.
Article
Engineering, Environmental
Huazhe Wang, Wanqian Guo, Qishi Si, Banghai Liu, Qi Zhao, Haichao Luo, Nanqi Ren
Summary: Polymeric carbon nitride (PCN), a star material in photocatalysis and persulfate activation, was used to synthesize bifunctional biochar-doped PCN. The optimized PCN/BC hybrid not only activated PS directly, but also exhibited improved optical properties. Mechanism studies showed different degradation pathways of BPA in the CNBC/PS and CNBC/PS/VIS systems, providing insights into hybrid advanced oxidation technologies.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Lulu Zhu, Baiyu Zhang, Qian Su, Runlu Liu, Jingyi Lin, Hua Wang, Shenmin Zhu, Yao Li
Summary: Introduction of oxygen vacancies can enhance the photocatalytic activity of BiVO4-based heterojunctions and promote the separation of charge carriers.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Environmental Sciences
Tian Yuan, Akira Tazaki, Kazunori Hashimoto, M. M. Aeorangajeb Al Hossain, Fitri Kurniasari, Nobutaka Ohgami, Masayo Aoki, Nazmul Ahsan, Anwarul Azim Akhand, Masashi Kato
Summary: Water pollution caused by tannery wastewater is a significant issue in developing countries, with high levels of phenolic compounds and chromium found in canal water. A compound called MF-HT, composed of magnesium and iron, showed high adsorption capacity for phenols and effectively reduced their levels in water, along with a 99.7% decrease in chromium levels. This compound has the potential to address tannery-related water pollution problems caused by phenols and chromium.
Article
Astronomy & Astrophysics
Moaathe Belhaj Ahmed, David Kubiznak, Robert B. Mann
Summary: An isolated critical point refers to a unique thermodynamic critical point in higher dimensions of Kth-order Lovelock gravity with hyperbolic black holes, achieved by fine-tuning Lovelock coupling constants. It represents the merging of two swallowtails and exhibits unconventional critical exponents. By applying a recent proposal for topological charge assignment to thermodynamic critical points, the isolated critical point is suggested to indicate the onset of a topological phase transition of a vortex-antivortex pair.
Article
Chemistry, Physical
Moritz Bensberg, Johannes Neugebauer
Summary: In this study, a pair-selected multi-level DLPNO-CCSD (T-0) approach is proposed to accurately calculate the changes in correlation energy between orbital pairs in chemical reactions. This method is more robust than previous approaches and more efficient without adding complexity or sacrificing accuracy.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Applied
Agileo Hernandez-Gordillo, Vicente Rodriguez-Gonzalez, Socorro Oros-Ruiz, Ricardo Gomez
Article
Chemistry, Applied
G. Mendoza-Damian, F. Tzompantzi, R. Perez-Hernandez, R. Gomez, A. Hernandez-Gordillo
Article
Chemistry, Applied
Getsemani Morales-Mendoza, Mayra Alvarez-Lemus, Rosendo Lopez, Francisco Tzompantzi, Rajesh Adhikari, Soo Wohn Lee, Leticia M. Torres-Martinez, Ricardo Gomez
Article
Chemistry, Multidisciplinary
Eliana Nope, Jose J. Martinez, Hugo A. Rojas, Angel G. Sathicq, Gustavo P. Romanelli
RESEARCH ON CHEMICAL INTERMEDIATES
(2017)
Article
Chemistry, Multidisciplinary
Diana Guerrero-Araque, Prospero Acevedo-Pena, David Ramirez-Ortega, Ricardo Gomez
NEW JOURNAL OF CHEMISTRY
(2017)
Article
Chemistry, Multidisciplinary
Annie Y. Vargas, Hugo A. Rojas, Gustavo P. Romanelli, Jose J. Martinez
GREEN PROCESSING AND SYNTHESIS
(2017)
Article
Biotechnology & Applied Microbiology
Clara Tzompantzi-Flores, Julio Cesar Castillo-Rodriguez, Ricardo Gomez, Francisco Tzompantzi, Raul Perez-Hernandez, Veronica De la Luz Tlapaya, Carlos Eduardo Santolalla-Vargas
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2019)
Article
Chemistry, Physical
Sandra Chaparro, Hugo A. Rojas, Gerardo Caicedo, Gustavo Romanelli, Antonio Pineda, Rafael Luque, Jose J. Martinez
Summary: Whey can be an economical alternative for reducing culture medium costs in MICP, but when discarded in large quantities, it may have environmental consequences. Increasing whey concentration in the medium decreases calcium carbonate purity and alters crystal polymorphism in biogenic CaCO3 production.
Article
Environmental Sciences
Julie Joseane Murcia Mesa, Jhon Sebastian Hernandez Nino, Wilson Gonzalez, Hugo Rojas, Maria Carmen Hidalgo, Jose Antonio Navio
Summary: The study compared the effectiveness of UV/H2O2 process and TiO2-based photocatalysis in treating industrial effluents, finding that a combination of both significantly improves the discoloration of dyes, elimination of bacteria, and degradation of organic compounds. UV/H2O2 was found to be the best treatment for dye elimination, while TiO2 photocatalysis showed excellent performance in eliminating bacteria and reducing TOC levels.
Article
Chemistry, Physical
Angela G. Romero-Villegas, Clara Tzompantzi-Flores, Raul Perez Hernandez, Arturo Barrera-Rodriguez, Francisco Tzompantzi, Ricardo Gomez
Summary: In this study, a cadmium-modified layered double hydroxide support was synthesized using a one-pot coprecipitation method, followed by sulfuring at different percentages using a solvothermal method. The samples were then analyzed using various characterization techniques. The synthesized and uncalcined materials were tested for hydrogen production from both water and a methanol-water solution under UV-light irradiation. The results showed that sulphuration significantly improved the photocatalytic activity, with maximum rate constants of hydrogen production observed in the methanol-water solution and water.
Article
Chemistry, Physical
J. J. Murcia, E. G. Avila-Martinez, H. Rojas, J. A. Navio, M. C. Hidalgo
APPLIED CATALYSIS B-ENVIRONMENTAL
(2017)
Article
Chemistry, Physical
Alexander Paez, Hugo A. Rojas, Omar Portilla, Gabriel Sathicq, Carlos A. M. Afonso, Gustavo P. Romanelli, Jose J. Martinez
Article
Chemistry, Physical
Jose J. Martinez, David F. Silva, Edna X. Aguilera, Hugo A. Rojas, Maria H. Brijaldo, Fabio B. Passos, Gustavo P. Romanelli
Article
Chemistry, Applied
M. Suarez-Quezada, G. Romero-Ortiz, V. Suarez, G. Morales-Mendoza, L. Lartundo-Rojas, E. Navarro-Ceron, F. Tzompantzi, S. Robles, R. Gomez, A. Mantilla
Article
Chemistry, Physical
Nadine J. Kanik, Artur Kuligiewicz, Jeffrey T. Cullen
Summary: This study examined the effects of different pre-treatments on the structural H-isotope composition of clay minerals. The results showed that different pre-treatments had varied impacts on different clay minerals, and the choice of pre-treatment should be based on the specific properties and mineralogy of the samples.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Lorenzo Lisuzzo, Giuseppe Cavallaro, Stefana Milioto, Giuseppe Lazzara
Summary: This study proposes Pickering emulsions based on wax and halloysite clay nanotubes for coating silk sutures to increase their loading capacity towards eosin. The presence of halloysite/wax microspheres on the surface of silk sutures has also been explored for controlled release of hydrophobic drugs. The influence of the coating on the thermal and mechanical properties of the sutures has been studied using various techniques. In conclusion, the wax/halloysite Pickering emulsions can successfully generate hydrophobic microdomains on the surface of silk sutures, leading to enhanced flexibility and improved loading capacity towards eosin.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Bruna F. Alves, Rita C. P. Nunes, Luiz C. Bertolino, Elizabete F. Lucas
Summary: Operational problems in the oil industry caused by the precipitation of paraffins can be prevented by using polymeric additives. This article evaluates the use of polymeric nanocomposites as pour point reducers in different types of crude oil and finds that they are more efficient than pure poly(ethylene-covinyl acetate) (EVA) in reducing the pour point. The nanocomposites also modify the wax crystals and reduce the viscosity of the oil samples.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
K. A. Daniels, C. C. Graham, A. C. Wiseall, J. F. Harrington, P. Sellin
Summary: Geological storage with clay buffer is widely preferred for removing hazardous radioactive waste. The impact of fluid salinity and void space on the swelling behavior of barrier bentonites was examined through experiments. The findings suggest that clay swelling is suppressed at higher salinities, which affects the void-filling process.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
N. Werling, A. Kuligiewicz, A. Steudel, R. Schuhmann, F. Dehn, K. Emmerich
Summary: Thermal treatment of clay minerals can be used to produce building materials and environmentally friendly binders. This process involves dehydration, dehydroxylation, breakdown of structure, and recrystallization of high temperature phases. Rehydration and rehydroxylation are important factors to consider for geopolymers and SCM.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Xuan Wang, Hao Ding, Zhuoqun Xu, Jianmeng Zhang, Yanbin Yao
Summary: Rutile nano-TiO2 was loaded onto the surface of sericite to prepare sericite-rutile composite particles, which were then modified with HDTMS and sprayed onto the substrates to form sericite-rutile/HDTMS composite coatings with UV shielding and superhydrophobic self-cleaning properties. The coating exhibited good UV shielding rate and remained superhydrophobic after UV irradiation. The hierarchical structure of the sericite-rutile composite and the low surface energy of HDTMS contributed to the superhydrophobicity and UV shielding effect of the coating.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Kailang Sun, Taojun Zhang, Jie Zhou, Yonghong Liu, Minfeng Zeng, Zhen Yang, Ruokun Feng, Xiaorong Ren, Peng Zhang, Baoyi Wang, Xingzhong Cao
Summary: Chitosan-Pd0 nano particles encapsulated in Al, Co-pillared montmorillonite nanocomposites were successfully synthesized using a facile one-pot heat treatment method. The Al, Co pillaring effectively expanded the surface area and generated numerous mesopores in the interlayer space of the MMt. The resultant nanocomposite exhibited similar high comprehensive catalytic performances as the one prepared by the regular divided-multistep method. The encapsulation of CS chains and doping of Co in the Al pillaring also contributed to the improved catalytic performance.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Nathalie Fagel, Isabel Israde-Alcantara, Reza Safaierad, Marttiina Rantala, Sabine Schmidt, Gilles Lepoint, Pierre Pellenard, Nadine Mattielli, Sarah Metcalfe
Summary: Environmental conditions significantly influence clay minerals, and studying clay sediments in tropical lakes can provide valuable insights into past environmental conditions. In this study, multiproxy records from sediment cores of three crater lakes in central Mexico were analyzed. The results showed that disordered kaolinite, formed through hydrolysis and hydrothermal alteration, was the predominant mineral in the sediments. The abundance of kaolinite varied in relation to organic carbon and organic matter-related elements, and showed opposite trends with lithogenic elements. Geochemical data suggested that the increase in kaolinite abundance is linked to the formation of organo-mineral aggregates and lake level changes in closed basins.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
M. J. Martin-Alfonso, A. Mejia, F. J. Martinez-Boza, P. Partal
Summary: The drilling industry is facing new challenges to develop eco-friendlier drilling fluids. Organic modified sepiolite dispersed in oil can be an excellent additive with suitable rheological properties. This study investigated the effect of alkyl ammonium modifiers on the microstructure and rheological properties of sepiolite-vegetable oil dispersions under high-temperature and high-pressure conditions.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Weiquan Zhan, Siyuan Yang, Shenxu Bao, Liuyi Ren, Cheng Liu
Summary: The interaction between talc and the depressor CMC was investigated through molecular dynamics simulation and density functional theory calculation. It was found that CMC showed stronger adsorption on the edge plane of talc due to enhanced interactions with polar groups and water molecules. The study also revealed specific interactions between H atoms in CMC and O atoms in the edge plane, as well as between O atoms in CMC and Si, Mg atoms in the edge plane. Hydration shells on the basal and edge planes of talc were examined to explain the phenomenon.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Pierre Dramou, Yiyang Sun, Xu Ni, Fangqi Wang, Hua He
Summary: In this study, a magnetic nanocomposite was prepared and used for the separation of rutin from real samples through magnetic solid phase extraction (MSPE). The nanocomposite exhibited high specific surface area, chemical and thermal stability, water solubility, and easy separation in aqueous solution. Characterization and experiments confirmed the successful synthesis and efficient enrichment ability of the nanocomposite.
APPLIED CLAY SCIENCE
(2024)
