Article
Nanoscience & Nanotechnology
Pamela Ramirez-Vidal, Rafael L. S. Canevesi, Alain Celzard, Vanessa Fierro
Summary: MOFs are potential materials for hydrogen storage, with MOF-5 showing enhanced hydrogen storage volume. Experimental data showed correlations between various parameters and micropore volume and size, while analysis was conducted on the hydrogen release capacities of different MOFs.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Environmental
Ruihao Tang, Huihao Wang, Yadong Chen, C. Srinivasakannan, Xinhui Duan, Xin Wang
Summary: The study investigated the sorption potential of different silica aerogels prepared by different drying methods for Zearalenone (ZEN). Atmospheric pressure dried aerogel showed the highest surface area and micropore content, while vacuum dried aerogel exhibited a completely mesoporous structure with the smallest surface area. Combustion dried aerogel also had a predominantly mesoporous structure with fractional micropores. The adsorption capacities of vacuum dried and combustion dried aerogels were comparable, indicating similar pore structures. The experimental results suggested that silica aerogels could serve as a promising low-cost adsorbent for ZEN removal.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Bowei Chen, Ling Ding, Yan Wang, Yong Zhang
Summary: A novel chitosan-based aerogel with swelling resistance was prepared using sol-gel technology. The introduction of resorcinol and g-C3N4 enhanced the stability and adsorption performance of the aerogel for thorium. The results showed outstanding adsorption properties, with a short equilibrium time, fast adsorption rate, high removal efficiency at low concentration, and a large adsorption capacity.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Nanoscience & Nanotechnology
Yan Song, Ning Xu, Guoliang Liu, Heshan Qi, Wei Zhao, Bin Zhu, Lin Zhou, Jia Zhu
Summary: Researchers have developed a new sorbent for high-yield atmospheric water harvesting, which has fast sorption kinetics and excellent photothermal properties. The optimized structure of the sorbent allows for rapid adsorption and desorption, providing a viable solution for solar-driven water harvesting.
NATURE NANOTECHNOLOGY
(2022)
Article
Engineering, Environmental
Xinyu Zhou, Huiran Jin, Shan Yun, Wanxia Huang, Pin Mao, Jing Chen, Yi Yang
Summary: In this study, a novel Cu nanoporous aerogel (Cu-NPA) was successfully prepared and characterized. The results showed that Cu-NPA exhibits high adsorption capacity and stability, making it a promising material for the removal of radioactive I2.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Analytical
Sermin Cam-Kaynar, Umit H. Kaynar
Summary: This study focuses on waste removal and recovery due to increasing environmental problems. Co-doped ZnO nanomaterial synthesized using the gel-ignition method was employed for thorium (IV) adsorption. The optimal conditions were determined using the Response Surface Method, with the experimental adsorption capacity reaching 121.29 mg g(-1).
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Chemistry, Analytical
Ruochen Zheng, Guoshu Mao, Zhihai Fu, Xian Zhang, Shengjie Yu, Yuanzhen Yue, Jiayun Li
Summary: A new poly(4-vinylpyridine) resin was synthesized and studied for the adsorption of Th4+. The adsorption kinetics and isotherms were analyzed, and the effects of contact time, nitric acid concentration, metal ion impurity, and initial Th4+ concentration were investigated. The study found that the adsorption equilibrium for Th4+ on the resin was reached within 30 minutes. The efficiency of Th4+ adsorption improved with the increase of nitric acid acidity, initial Th4+ concentration, and the presence of metal nitrate.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Chemistry, Physical
Zeping Li, Xiong Yu, Yunhao Zhu, Sisi Liu, Xiaoyan Wen, Haifei Lu, Cong Wang, Xiao Li, Ming-Yu Li, Yingping Yang
Summary: In this study, ZnO quantum dot (QD) / magnetron sputtered ZnO homojunction photodetectors with excellent performance were fabricated by systematically varying the thickness ratios between two ZnO layers. The balanced ratio resulted in extra adsorption-desorption sites from the ZnO QDs and accelerated carrier transportation from the highly crystallized magnetron sputtered ZnO layers. As a result, the fabricated ZnO homojunction photodetector showed significantly increased responsivity and external quantum efficiency, paving the way for ultra-sensitive UV photodetection.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Chemical
Youcai Hu, Jianhua Ding, Guangyuan Ren, Tianxiang Jin, Zhirong Liu, Yong Qian
Summary: In this study, a novel polymer-based xerogel, CCS-TCEP, was successfully prepared and applied for the adsorption of thorium ions. The CCS-TCEP exhibited high adsorption capacity, excellent selectivity, and fast adsorption rate. After multiple cycles of reuse, the adsorption capacity of CCS-TCEP remained high. The extraction mechanism of CCS-TCEP for thorium ions was analyzed in detail, indicating its potential application value.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Xianghua Gong, Yang Li, Jinzhu Wu, Hongjun Kang, Xiaohong Wu
Summary: Recently, zeolites have been selected as potential adsorbents for capturing space molecular contaminants due to their strong adsorption ability and extreme stability. However, there have been few reports on the improved adsorption behavior of modified zeolite adsorbents under ultralow pressure. In this study, a 13X/ZnO adsorbent was prepared by incorporating ZnO nanoislands into nanoporous zeolite 13X via atomic layer deposition. The 13X/ZnO-50 adsorbent exhibited an increased adsorption capacity for dimethyl phthalate and outgassing species of J133 adhesive even at an ultralow pressure of 10-5 Pa, attributed to the synergistic effects of physical interactions and chemical adsorption. This work provides a useful strategy for developing adsorbents for space molecular contamination control.
ACS APPLIED NANO MATERIALS
(2023)
Article
Energy & Fuels
Ilya E. Men'shchikov, Denys I. Grekov, Pascaline Pre, Luis F. Paz Lopez, Elena V. Khozina, Andrey V. Shkolin, Anatolii A. Fomkin
Summary: Four activated carbons (ACs) derived from polymers, wood waste, and silicon carbide were evaluated for ethane/methane mixture separation. The ACs exhibited different porosity features, and the most efficient adsorbent for separation was found to be S-1. The selectivity of the ACs for ethane correlated with pore size, as well as the presence of high-energy adsorption centers.
Article
Engineering, Environmental
Tao Chen, Yuanfeng Wei, Weijian Yang, Chengbin Liu
Summary: A granular MgO-embedded biochar adsorbent, g-MgO-Bc, with high adsorption capacity of 249.1 mg/g for As(III) is fabricated by dispersing high-density MgO nanoparticles throughout the biochar matrix. The adsorbent can efficiently remove As(III) over a wide pH range and be regenerated easily through simple calcination. This work extends the potential applicability of biochar adsorbents for As(III) removal.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Fuat Aslan, Demet Baybas, Ulvi Ulusoy
Summary: This study investigated the grafting of water-soluble sulfolignin onto hydroxyapatite and its composite properties in polyacrylamide. The characterization and adsorption tests showed the formation of PSLgHap and its adsorption characteristics for Th4+ and BSA.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Multidisciplinary Sciences
Francis Okejiri, Juntian Fan, Zhennan Huang, Kevin Michael Siniard, Miaofang Chi, Felipe Polo-Garzon, Zhenzhen Yang, Sheng Dai
Summary: In this study, a facile synthesis method for single-phase high-entropy oxide nanocrystals was reported, and palladium nanoclusters were successfully stabilized within the structure. The resulting catalyst showed good catalytic performance in CO oxidation, highlighting the advantage of the high-entropy oxide as a carrier support over traditional oxides.
Article
Engineering, Chemical
Junpeng Yuan, Xianglong Liu, Min Li, Hui Wang
Summary: A class of potential materials for trapping benzene with ultra-high adsorption and outstanding selectivity was obtained through high-throughput computational screening. The microscopic mechanism of effective adsorption sites was explained using a local atomic environment tool. It is suggested that tuning the Si/Al ratio, introducing ionic liquids, and ion substitution can significantly improve the performance of potential adsorbents.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Optics
G. Souadi, U. H. Kaynar, M. Ayvacikli, A. Canimoglu, N. Can
Summary: Undoped BaSiF6, Dy3+ doped BaSiF6, and Dy3+, Li+ co-doped BaSiF6 phosphors were synthesized via a gelcombustion method and characterized using various techniques including XRD, FTIR, EDS, and PL. The results indicated that co-doping with Li+ can enhance the photoluminescence intensity of BaSiF6:Dy3+, with the optimal Li+ concentration found to be 8%.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
G. Souadi, S. Akca-Ozalp, E. Ekdal Karali, U. H. Kaynar, M. Ayvacikli, M. Topaksu, N. Can
Summary: BaSiF6 phosphor was synthesized using a gel combustion method, with a crystalline size of 54.17 +/- 4.36 nm. TL glow peaks of BaSiF6 phosphors were observed around 84, 190, and 322 degrees C. The study suggests that the luminescence process in the material may follow second order kinetics.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Chemistry, Physical
G. Souadi, U. H. Kaynar, M. Oglakci, M. Sonsuz, M. Ayvacikli, M. Topaksu, A. Canimoglu, N. Can
Summary: In this study, lithium molybdate phosphor was synthesized by a gel combustion method and its thermoluminescence properties were investigated. The kinetic parameters of the phosphor were determined using various methods, and the results showed that it has potential applications in dosimetry, particularly in clinical dose monitoring.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Umit H. Kaynar
Summary: This study aims to investigate the adsorption properties of a new material for nuclear waste. The experiments showed that the material has a high adsorption capacity for Thorium (IV) under specific conditions.
INORGANIC AND NANO-METAL CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
J. Hakami, M. Sonsuz, U. H. Kaynar, M. Ayvacikli, M. Oglakci, M. Yueksel, M. Topaksu, N. Can
Summary: In this study, the CBYO phosphor was successfully synthesized using a gel combustion method, and XRD measurement confirmed its single-phase structure. TL measurements revealed significant glow peaks at different beta doses, showing good linearity in the range of 0.1-100 Gy. Multiple methods were used to determine the number of peaks, the trap structure, and the kinetic parameters of the CBYO phosphor. The findings suggest that CBYO is a promising material for environmental studies due to its adequate TL dose response, sensitivity, and linearity.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Chemistry, Inorganic & Nuclear
Aziza H. Qaisi, U. H. Kaynar, M. Ayvacikli, J. Garcia-Guinea, Y. Alajlani, M. Topaksu, N. Can
Summary: This study reports the luminescent properties of undoped and Dy3+ doped borate through CL and PL under electron beam and laser excitation. The concentration quenching phenomenon at 1 mol% doping concentration is discussed.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Materials Science, Ceramics
G. Souadi, M. Oglakci, U. H. Kaynar, V. Correcher, J. F. Benavente, K. Bulcar, M. Ayvacikli, A. Hiziroglu, M. Topaksu, N. Can, E. Ekdal Karali
Summary: In this study, LiMoO4:xEu ceramic phosphors with different Eu doping concentrations were successfully synthesized using a gel combustion method. The optimum doping concentration was determined based on thermoluminescence intensity and XRD measurements. The dose-response was evaluated at different doses, and the thermoluminescence characteristics of Eu-doped Li2MoO4 were studied using various methods.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
J. Hakami, Umit H. Kaynar, M. Ayvacikli, M. B. Coban, J. Garcia-Guinea, P. D. Townsend, M. Oglakci, N. Can
Summary: A series of Tb3+-doped Y1-xAl3(BO3)4 phosphors were synthesized and characterized in this study. The synthesized phosphors exhibited good crystallinity and crystal structure, and showed a green main emission peak at 543 nm under excitation. The photoluminescence intensity of the phosphors increased with increasing Tb3+ ion concentration up to a certain threshold, and then exhibited concentration quenching. Moreover, the study found the activation energies for thermal quenching at different wavelengths.
CERAMICS INTERNATIONAL
(2022)
Article
Instruments & Instrumentation
J. Hakami, M. Sonsuz, U. H. Kaynar, M. Ayvacikli, M. Oglakci, M. Topaksu, N. Can
Summary: This study investigates the thermoluminescence characteristics of Ca3Y2B4O12:xDy phosphor samples. The concentration of Dy3+ was optimized at 1% for the best TL signal quality. The TL glow curve consists of three peaks, and the trapping parameters were calculated using IR and VHR techniques.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2022)
Article
Materials Science, Ceramics
Umit H. Kaynar, M. B. Coban, A. Y. Madkhli, M. Ayvacikli, N. Can
Summary: SrSnO3 doped with Dy3+ ions at different concentrations (1, 2, 3, and 5 wt %) were synthesized using a hydrothermal reaction and characterized using various techniques. The XRD analysis confirmed the cubic perovskite-type structure of SrSnO3. The PL emission spectrum of Dy3+-activated samples showed characteristic peaks corresponding to different transition wavelengths. The intensity of the PL emission increased with increasing doping concentration up to 3 wt % and then decreased due to concentration quenching. The PL emission spectra also exhibited anomalies at 270 K, consistent with a structural phase transition in SrSnO3.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
G. Souadi, K. Bulcar, Umit H. Kaynar, M. Ayvacikli, M. Topaksu, S. Cam-Kaynar, N. Can
Summary: By utilizing thermoluminescence (TL), we have conducted a comprehensive investigation on YAl3(BO3)4 host matrices doped with different concentrations of Tb3+, which were prepared through combustion. The TL glow curves, measured under beta ray exposure at varying doses, exhibited four broad peaks located at approximately 76, 126, 230, and 378 degrees Celsius. After 5 Gy beta irradiation, the peak maximum of the 230 degrees Celsius peak shifted towards higher temperatures, while the peak maxima of the other peaks remained almost constant. It is interesting to note that the shift of the 230 degrees Celsius peak towards higher temperatures with increased radiation dose can be attributed to the multi-phase nature of the sample. Additionally, the TL glow curve displayed a proportional increase in intensity with an increase in the heating rate. Possible causes for this pattern were discussed. The observed peaks using the TmTstop method were a result of the presence of a quasi-continuous distribution of traps. The trap parameters were also estimated using various heating rate methods, which displayed excellent agreement with one another.
APPLIED RADIATION AND ISOTOPES
(2023)
Article
Chemistry, Physical
Umit H. Kaynar, M. Oglakci, K. Bulcar, S. Benourdja, M. Bakr, M. Ayvacikli, A. Canimoglu, M. Topaksu, N. Can
Summary: In this study, the undoped and Eu3+-doped YAl3(BO3)(4) phosphors were synthesized by a combustion process and characterized using XRD and TL techniques. The XRD analysis confirmed the crystallized structure of the synthesized phosphors. TL measurements showed that the undoped sample exhibited three glow peaks at 80 degrees C, 240 degrees C, and 360 degrees C, while the Eu3+-doped sample showed peaks at 90 degrees C, 230 degrees C, and 390 degrees C. The TL intensity and kinetics were investigated, and the results indicated a non-linear behavior in the Eu3+-doped sample.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Environmental Sciences
Priyanka J. Reddy, Rajesh Sankhla, Probal Chaudhury
Summary: This study is of great importance for conducting H-3 contamination screening. The calibration curves constructed based on optimized parameters can accurately determine H-3 concentration in various water samples.
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2024)
Article
Environmental Sciences
Rafael Campos de Oliveira, Carlos Alberto de Carvalho Filho, Rubens Martins Moreira, Eliana Nonato Knupp
Summary: This study quantitatively and spatially evaluated the leachate plume from the Belo Horizonte landfill and found that the leachate contained significantly higher levels of tritium compared to rainfall. The tritium was transported towards the Coqueiros stream, with higher concentration close to the landfill slope. The study also identified factors that contribute to higher tritium levels in certain areas, such as the denser character of the leachate and the presence of rock near the surface.
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2024)
Article
Environmental Sciences
T. E. Kozhakhanov, N. V. Larionova, S. N. Lukashenko, Zh. A. Baigazinov, A. M. Kabdyrakova, A. Ye. Kunduzbayeva
Summary: The paper presents the results of a long-term experiment on fruit and berry crops grown in conditions of radioactive contamination. The study aims to understand how different species of trees and shrubs accumulate artificial radionuclides, focusing on their absorption through roots from soil. The findings show that the radionuclides are not evenly distributed among the plant organs, with leaves having higher concentrations than branches and fruits. The study also provides quantitative parameters for the transfer and distribution of specific radionuclides in different parts of the crops.
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2024)
Article
Environmental Sciences
Yayra Afram, Godwin Amenorpe, Elvis Asare Bediako, Alfred A. Darkwa, Isaac Kodzo Amegbor
Summary: This study evaluated the response of maize genotypes to gamma radiation and determined an effective dosage for mutation breeding. The results showed a decrease in the growth and plant characteristics of maize with increasing gamma radiation doses.
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2024)
Article
Environmental Sciences
Maria Angelica Vergara Wasserman, Aline Gonzalez Viana, Michele Maria da Silva, Flavia Bartoly, Tatiane Rocha Pereira, Ronaldo Janvrot Vivone, Ana Cristina de Melo Ferreira, Daniel Vidal Perez
Summary: Public concerns about environmental protection have increased since the Fukushima accident. The soil-plant transfer factor (Fv) is an important parameter for environmental risk assessment. The study investigates the behavior of 90Sr in Brazilian soils and finds that a significant portion of 90Sr remains potentially mobile, mainly in the bioavailable phase. The behavior of 90Sr in these soils is influenced by ionic competition mechanisms and the presence of stable Sr and major nutrients. The mineralogy of the soils also plays a role in the transfer of 90Sr.
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2024)
Article
Environmental Sciences
P. Pavlenko, V. Yoschenko, M. Hrechaniuk, T. Wada, V. Kashparov
Summary: Activity concentrations of 90Sr in fish in lakes within the Chornobyl Exclusion Zone exceed permissible levels, and transferring contaminated fish to clean water does not effectively reduce 90Sr content. Establishing permissible levels of 90Sr concentration only in fish fillet is appropriate for human radiation protection.
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2024)
