U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject "irradiation" Remove constraint Subject: "irradiation"
Start Over

Search

28,127  Search Results

« Previous | 1 - 20 of 28,127 |
Number of results to display per page

Search Results

1. Construction of dual Z-scheme Bi2WO6/g-C3N4/black phosphorus quantum dots composites for effective bisphenol A degradation

Author:
Fuyou Du; Zhan Lai; Huiyang Tang; Haiyan Wang; Chenxi Zhao
Source:
Journal of environmental sciences (China) 2023 v.124 pp. 617-629
ISSN:
1001-0742
Subject:
irradiation,   etc   ; bisphenol A; light; phosphorus; photocatalysis; photocatalysts; pollution; China;     Show all 8 Subjects
Abstract:
... In this work, a novel dual Z-scheme Bi₂WO₆/g-C₃N₄/black phosphorus quantum dots (Bi₂WO₆/g-C₃N₄/BPQDs) composites were fabricated and utilized towards photocatalytic degradation of bisphenol A (BPA) under visible-light irradiation. Optimizing the content of g-C₃N₄ and BPQDs in Bi₂WO₆/g-C₃N₄/BPQDs composites to a suitable mass ratio can enhance the visible-light harvesting capacity and increase the ...
DOI:
10.1016/j.jes.2021.10.027

2. Efficient removal of Cr(VI) by a 3D Z-scheme TiO2-ZnxCd1-xS graphene aerogel via synergy of adsorption and photocatalysis under visible light

Author:
Qianwei Liang; Xin Chen; Ruina Liu; Ke Xu; Hanjin Luo
Source:
Journal of environmental sciences (China) 2023 v.124 pp. 360-370
ISSN:
1001-0742
Subject:
irradiation,   etc   ; adsorption; aerogels; graphene; graphene oxide; light; photocatalysis; photocatalysts; synergism; virulence; wavelengths; China;     Show all 12 Subjects
Abstract:
... Efficient and robust photocatalysts for environmental pollutants removal with outstanding stability have great significance. Herein, we report a kind of three dimensional (3D) photocatalyst presented as Z-scheme heterojunction, which combining TiO₂ and ZnₓCd₁₋ₓS with graphene aerogel to contrast TiO₂-ZnₓCd₁₋ₓS graphene aerogel (TSGA, x=0.5) through a moderate hydrothermal process. The as-prepared ...
DOI:
10.1016/j.jes.2021.09.037

3. Construction of Ag2CO3/BiOBr/CdS ternary composite photocatalyst with improved visible-light photocatalytic activity on tetracycline molecule degradation

Author:
Kaliyappan Perumal; Shajahan Shanavas; Tansir Ahamad; Annamalai Karthigeyan; Padmanabhan Murugakoothan
Source:
Journal of environmental sciences (China) 2023 v.125 pp. 47-60
ISSN:
1001-0742
Subject:
irradiation,   etc   ; absorption; electron paramagnetic resonance spectroscopy; pH; photocatalysis; photocatalysts; photoluminescence; photolysis; pollution control; synergism; tetracycline; transmission electron microscopy; ultraviolet-visible spectroscopy; wastewater; China;     Show all 15 Subjects
Abstract:
... Photocatalytic degradation was considered as a best strategy for the removal of antibiotic drug pollutants from wastewater. The photocatalyst of ABC (Ag₂CO₃/BiOBr/CdS) composite synthesized by hydrothermal and precipitation method. The ABC composite used to investigate the degradation activity of tetracycline (TC) under visible light irradiation. The physicochemical characterization methods (e.g. ...
DOI:
10.1016/j.jes.2021.10.021

4. Effect of electron beam irradiation in gas atmosphere during ETEM

Author:
Tomoharu Tokunaga; Takumi Kawakami; Kimitaka Higuchi; Yuta Yamamoto; Takahisa Yamamoto
Source:
Micron 2022 v.158 pp. 103289
ISSN:
0968-4328
Subject:
irradiation,   etc   ; energy; ionization;     Show all 3 Subjects
Abstract:
... Transmission electron microscopy (TEM) is used to observe the atomic structures of materials. Environmental TEM (ETEM) is a method wherein a gas can be evaluated and it has been used to observe the dynamic reaction between materials and gases at the atomic level. An electron beam (EB), which has a sufficiently high energy (exceeding a few tens of kilovolts), can be used to ionize gas molecules. Su ...
DOI:
10.1016/j.micron.2022.103289

5. Visible-Light-Mediated Three-Component Radical Iodosulfonylative Cyclization of Enynes

Author:
Qi Cheng; Fengrong Zhang; Xiaoyun Chen; Ying Han; Chaoguo Yan; Yaocheng Shi; Hong Hou; Shaoqun Zhu
Source:
Organic letters 2022 v.24 no.13 pp. 2515-2519
ISSN:
1523-7052
Subject:
irradiation,   etc   ; iodination; light;     Show all 3 Subjects
Abstract:
... An efficient three-component radical iodosulfonylative cyclization of enynes is described. The visible-light irradiation of iodoform with sulfinates enables sulfonyl radical generation under catalyst- and oxidant-free conditions and triggers the radical addition, cyclization and iodination cascade reactions, giving various vinyl iodide containing sulfones in moderate to good yields. ...
DOI:
10.1021/acs.orglett.2c00655

6. A multi-color persistent luminescent phosphor β-NaYF₄:RE³⁺ (RE = Sm, Tb, Dy, Pr) for dynamic anti-counterfeiting

Author:
Bohan Wang; Zhihao Wang; Peng Mao; Yu Wang
Source:
RSC advances 2022 v.12 no.18 pp. 11534-11542
ISSN:
2046-2069
Subject:
irradiation,   etc   ; X-radiation; luminescence;     Show all 3 Subjects
Abstract:
... Conventional luminescent materials generally exhibit uni-color and transient emission under UV excitation, which makes them mediocre in the field of anti-counterfeiting. The high-level anti-counterfeiting techniques are always becoming more complicated and in need of multi-color and persistent luminescent materials. Herein, we report a series of β-NaYF₄:RE³⁺ (RE = Sm, Tb, Dy, Pr) persistent lumine ...
DOI:
10.1039/d2ra01425d

7. Construction of NIR etchable nanoparticles via co-assembly strategy for appointed delivery

Author:
Dong Wang; Zhihao Fan; Haofeng Min; Xinhao Wang; Hui Li; Guangcheng Wei; Jiqian Wang
Source:
Colloids and surfaces 2022 v.648 pp. 129395
ISSN:
0927-7757
Subject:
irradiation,   etc   ; cytotoxicity; drugs; peptides;     Show all 4 Subjects
Abstract:
... NIR etchable nanoparticles were prepared from NIR-triggered molecule (ASBBCM) and short anticancer peptide segment. After NIR irradiation, the surface of nanoparticles became rough according to the TEM observation due to ASBBCM degradation. Since the nanoparticles were gradually destroyed from the surface, functional YSV peptides were released simultaneously. The release rates were closely related ...
DOI:
10.1016/j.colsurfa.2022.129395

8. Laser-Triggered Bottom-Up Transcription of Chemical Information: Toward Patterned Graphene/MoS₂ Heterostructures

Author:
Xin Chen; Mhamed Assebban; Malte Kohring; Lipiao Bao; Heiko B. Weber; Kathrin C. Knirsch; Andreas Hirsch
Source:
Journal of the American Chemical Society 2022 v.144 no.22 pp. 9645-9650
ISSN:
1520-5126
Subject:
irradiation,   etc   ; chemical bonding; graphene;     Show all 3 Subjects
Abstract:
... Efficiently assembling heterostructures with desired interface properties, stability, and facile patternability is challenging yet crucial to modern device fabrication. Here, we demonstrate an interface coupling concept to bottom-up construct covalently linked graphene/MoS₂ heterostructures in a spatially defined manner. The covalent heterostructure domains are selectively created in analogy to th ...
DOI:
10.1021/jacs.2c00642

9. Ancient Chinese magic square-based PV array reconfiguration methodology to reduce power loss under partial shading conditions

Author:
Rupendra Kumar Pachauri; Sudhakar Babu Thanikanti; Jianbo Bai; Vinod Kumar Yadav; Belqasem Aljafari; Santosh Ghosh; Hassan Haes Alhelou
Source:
Energy conversion and management 2022 v.253 pp. 115148
ISSN:
0196-8904
Subject:
irradiation,   etc   ; administrative management; energy conversion;     Show all 3 Subjects
Abstract:
... Non-uniform irradiation levels also have a negative impact on solar photovoltaic (PV) systems, forcing them to increase their power losses. Each PV array row has different current generation levels due to the effect of partial shading conditions (PSCs) and eventually has multiple power maxima, e.g. global maximum power point (GMPP) and local maximum power point (LMPP) on the power-voltage (P-V) ch ...
DOI:
10.1016/j.enconman.2021.115148

10. Impacts of negatively charged colloidal clay particles on photoisomerization of both anionic and cationic azobenzene molecules

Author:
Emiko Mouri; Kei Kajiwara; Shuhei Kawasaki; Yusuke Shimizu; Hikaru Bando; Hideki Sakai; Teruyuki Nakato
Source:
RSC advances 2022 v.12 no.17 pp. 10855-10861
ISSN:
2046-2069
Subject:
irradiation,   etc   ; clay; photoisomerization; ultraviolet radiation;     Show all 4 Subjects
Abstract:
... Although smectite-type clays are used as heterogeneous media for photofunctional guest molecules, the guest species are limited to cationic or polar molecules because of the intrinsic negative electric charges of clay particles. Nevertheless, in this study, aqueous clay colloids are reported to affect the photoisomerization kinetics of anionic and cationic azobenzene molecules dissolved in the col ...
DOI:
10.1039/d2ra01020h

11. Ion beam-induced bending of TiO₂ nanowires with bead-like and prismatic shapes

Author:
Zhina Razaghi; Dong Yue Xie; Ming-hui Lin; Guo-zhen Zhu
Source:
RSC advances 2022 v.12 no.9 pp. 5577-5586
ISSN:
2046-2069
Subject:
irradiation,   etc   ; angle of incidence; nanowires;     Show all 3 Subjects
Abstract:
... Ion beam irradiation is a promising method to manipulate the composition and shape of nanowires. It causes the formation of crystal defects like vacancies and dislocations, and consequently, a volume expansion within the irradiated region, giving rise to the nanowire bending. The bending effect has been extensively discussed within nanowires with different diameters under ion beams with varying en ...
DOI:
10.1039/d1ra09122k

12. Irradiation resistance of preceramic paper‐derived SiCf/SiC laminated composites

Author:
Ke Li; Egor Kashkarov; Hailiang Ma; Ping Fan; Qiaoli Zhang; Peng Zhang; Xingzhong Cao; Jilong Zhang; Zhaohui Wu; Andrey Lider; Nahum Travitzky; Daqing Yuan
Source:
Journal of materials science 2022 v.57 no.22 pp. 10153-10166
ISSN:
0022-2461
Subject:
irradiation,   etc   ; crystallization; radiation resistance; silicon;     Show all 4 Subjects
Abstract:
... Influence of the ion irradiation at elevated temperatures on the novel preceramic paper-derived SiCf/SiC laminated composites fabricated by spark plasma sintering was investigated. The composites were subjected to high-dose simultaneous irradiation of silicon (Si) ions at 400 °C. Irradiation induces amorphization of the damaged area up to 30 dpa, and then recrystallization of amorphous regions wit ...
DOI:
10.1007/s10853-022-07294-6

13. Modulation of spatiotemporal dynamics in the bromate–sulfite–ferrocyanide reaction system by visible light

Author:
Mengfei Liu; Chunxiao Meng; Ling Yuan
Source:
RSC advances 2022 v.12 no.24 pp. 15145-15149
ISSN:
2046-2069
Subject:
irradiation,   etc   ; light intensity; pH; photoinhibition;     Show all 4 Subjects
Abstract:
... We have carried out the first systematic study of the effects of visible light on the homogenous dynamics in the bromate–sulfite–ferrocyanide (BSF) reaction. Under flow conditions, the reaction system displayed photoinduction and photoinhibition behavior, and the oscillatory period decreased with the increase of light intensity, which is due to the fact that light irradiation mainly enhanced the n ...
DOI:
10.1039/d2ra01422j

14. New insights on metal ions accelerating the aging behavior of polystyrene microplastics: Effects of different excess reactive oxygen species

Author:
Xiaoqin Yu; Yibo Xu; Mengfan Lang; Daofen Huang; Xuetao Guo; Lingyan Zhu
Source:
Science of the total environment 2022 v.821 pp. 153457
ISSN:
0048-9697
Subject:
irradiation,   etc   ; environment; microplastics; pollution; polystyrenes;     Show all 5 Subjects
Abstract:
... Microplastics (MPs) will coexist with various pollutants in the environment, but it is not clear whether these pollutants will affect the aging process of MPs. The aging process of polystyrene microplastics (PS-MPs) mediated by Cu²⁺ and Pb²⁺ was investigated in this study. The results showed that the aging rate of PS-MPs mediated by Cu²⁺ and Pb²⁺ were significantly higher than that of ultrapure wa ...
DOI:
10.1016/j.scitotenv.2022.153457

15. Novel preparation of 2,5-diarylpyrroles from aromatic nitriles with 3-arylpropylmagnesium bromides, 1,3-diiodo-5,5-dimethylhydantoin, and tBuOK

Author:
Momoko Nakamura; Kazuhiro Yoshida; Hideo Togo
Source:
Tetrahedron 2022 v.112 pp. 132709
ISSN:
0040-4020
Subject:
irradiation,   etc   ; ambient temperature; imines; nitriles;     Show all 4 Subjects
Abstract:
... Treatment of aromatic nitriles with 3-arylpropylmagnesium bromides under warming conditions and then water, followed by the reaction with DIH at room temperature under irradiation with a LED lamp and then with ᵗBuOK gave 2,5-diarylpyrroles in moderate yields. The key step of the present method is the formation of N-iodo-2,5-diaryl-4,5-dihydropyrroles by the reaction of the formed imines with DIH, ...
DOI:
10.1016/j.tet.2022.132709

16. Double quantum dots decorated layer structure CeCO3OH for improved N2 photo-fixation

Author:
Huaiwei Zhang; Yifan Chen; Liang Bao; Yong-Jun Yuan
Source:
Journal of catalysis 2022 v.412 pp. 1-9
ISSN:
0021-9517
Subject:
irradiation,   etc   ; carbon; catalytic activity; energy; photocatalysts;     Show all 5 Subjects
Abstract:
... The moderate N₂ photofixation catalyzed by CeO₂-based materials has been attracted much attention. Herein, double quantum dots of carbon and Co(OH)₂ doped layer structure CeCO₃OH are demonstrated firstly, in which double quantum dots can provide much more reaction active sites and improve the energy band structures. The double quantum dots decorated catalyst representsthe better performances for t ...
DOI:
10.1016/j.jcat.2022.06.004

17. Enhanced photocatalytic activity of 3D hierarchical RP/BP/BiOCOOH via oxygen vacancies and double heterojunctions

Author:
Guangmei Xu; Chi Ma; Jingjing Wei; Xu Yang; Tantan Wang; Chang Tan; Kaihua Yang; Kainian Jiang; Guanlong Yu; Chang Zhang; Xin Li
Source:
Chemosphere 2022 v.300 pp. 134485
ISSN:
0045-6535
Subject:
irradiation,   etc   ; cytotoxicity; lighting; oxygen; photocatalysis; semiconductors;     Show all 6 Subjects
Abstract:
... A 3D hierarchical RP/BP/BiOCOOH double heterostructures with abundant oxygen vacancies (OVs) was obtained by hydrothermal process and its photocatalytic activity was investigated by degradation of TC-HCl with different light sources and various natural water. The physicochemical characteristics of RP/BP/BiOCOOH heterojunctions were systematically characterized via TEM, XPS, EPR, EIS et al. Compare ...
DOI:
10.1016/j.chemosphere.2022.134485

18. High-power laser irradiation for high-temperature in situ transmission electron microscopy

Author:
Naoki Uemura; Tomoya Egoshi; Koichi Murakami; Tokushi Kizuka
Source:
Micron 2022 v.157 pp. 103244
ISSN:
0968-4328
Subject:
irradiation,   etc   ; heat; transmission electron microscopy; tungsten;     Show all 4 Subjects
Abstract:
... We developed high temperature in situ transmission electron microscopy using a high-density laser irradiation device (nominal maximum laser density ~9.4 GW/m²) and a corresponding heat shielding sample mount device. The spatial line resolution of the microscope was maintained to be 0.14 nm at ambient temperatures after the installation of the laser irradiation device. The system was applied to the ...
DOI:
10.1016/j.micron.2022.103244

19. In situ construction of a Te/CsPbBr₃ heterojunction for self-powered photodetector

Author:
Jie Zhang; Jiaojiao Liu
Source:
RSC advances 2022 v.12 no.5 pp. 2729-2735
ISSN:
2046-2069
Subject:
irradiation,   etc   ; electric current; evaporation; photosensitivity; solvents;     Show all 5 Subjects
Abstract:
... In this study, CsPbBr₃ particles were prepared by a simple solvent evaporation method in ambient environment; the p–n heterojunction formed by CsPbBr₃ particles on the surface of a single long Te wire was used to construct a high-performance Te/CsPbBr₃ photodetector. Compared with CsPbBr₃ PDs, the Te/CsPbBr₃ photodetector showed improved photocurrent, and exhibited characteristics of excellent sel ...
DOI:
10.1039/d1ra08236a

20. Optical, structural and morphological studies of nanostructures fabricated on silicon surface by femtosecond laser irradiation

Author:
R. Kuladeep; L. Jyothi; Chakradhar Sahoo; D. Narayana Rao; V. Saikiran
Source:
Journal of materials science 2022 v.57 no.3 pp. 1863-1880
ISSN:
0022-2461
Subject:
irradiation,   etc   ; oxidation; oxygen; periodicity; photoluminescence; silicon;     Show all 6 Subjects
Abstract:
... We report here a detailed analysis of the ultrashort laser pulse irradiation effects on a single crystalline silicon surface. A systematic study has been performed to understand the surface morphological changes under irradiation with ultrashort laser pulses by changing different input laser parameters such as laser fluence, laser pulse number, and incident laser polarization. Field emission scann ...
DOI:
10.1007/s10853-021-06712-5