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1. Three-dimensional, millimeter-scale semiconducting SWCNT aerogels for highly sensitive ozone detection

Author:
Park, Byeongho; Park, Teahoon; Kim, Sang-Woo; Jeong, Minju; Oh, Youngseok; Um, Moon-Kwang
Source:
Journal of hazardous materials 2020 v.394 pp. 122516
ISSN:
0304-3894
Subject:
surface area,   etc   ; aerogels; carbon nanotubes; ozone; semiconductors;     Show all 5 Subjects
Abstract:
... Semiconducting frameworks possessing porous structure are promising platforms for the detection of hazardous gas molecules. In this study, we propose a facile route to fabricate millimeter-scale, three-dimensional semiconducting SWCNT (s-SWCNT) aerogels and demonstrate deactivation of the co-existing metallic SWCNT (m-SWCNT) network via electrical breakdown process. In particular, the on-off ratio ...
DOI:
10.1016/j.jhazmat.2020.122516

2. Synthesis of Nb-Doped Li₂ZnTi₃O₈ Anode with Long Cycle Life and Applications in the LiMn₂O₄/Li₂ZnTi₃O₈ Full Cell

Author:
Zhang, Zhongxue; Xun, Rui; Shen, Ziye; Wang, Lijuan; Wang, Song; Meng, Zhaohui
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.7 pp. 2763-2771
ISSN:
2168-0485
Subject:
surface area,   etc   ; anodes; electrochemistry; particle size;     Show all 4 Subjects
Abstract:
... An easy solid-state method is used to prepare Li₂ZnTi₃O₈ (LZTO) doped by the Nb element (LZTN1O). Nb-doping not only improves the specific surface area, total pore volume, and ionic conductivity but also reduces the particle size and transfer resistance of LZTN1O. In addition, the structure has been stabilized, and good electrical contact has been obtained for the LZTN1O electrode via Nb-doping. C ...
DOI:
10.1021/acssuschemeng.9b06581

3. Formation and effect of the branched layer during the tunnel etching of aluminum foil

Author:
Peng, Ning; Wen, Yuqing; Shang, Wei; He, Yedong
Source:
Journal of materials science 2020 v.55 no.3 pp. 1246-1255
ISSN:
0022-2461
Subject:
surface area,   etc   ; aluminum foil; capacitance; electrochemistry; electrolytes;     Show all 5 Subjects
Abstract:
... In this study, branched layers formed under various conditions of the electrochemical etching of aluminum foils were observed. Tunnel clustering arose from the random distribution of high-density tunnels, greatly increasing the thickness of the branched layer; this occurred because the tunnel clustering increased the tunnel width, thereby facilitating electrolyte transport in vertical tunnels. In ...
DOI:
10.1007/s10853-019-03979-7

4. A novel 2D/1D core-shell heterostructures coupling MOF-derived iron oxides with ZnIn2S4 for enhanced photocatalytic activity

Author:
Liang, Qian; Gao, Wen; Liu, Changhai; Xu, Song; Li, Zhongyu
Source:
Journal of hazardous materials 2020 v.392 pp. 122500
ISSN:
0304-3894
Subject:
surface area,   etc   ; annealing; ferric oxide; iron; nitrogen; photocatalysis; pyrolysis; sulfides;     Show all 8 Subjects
Abstract:
... 1D spindle-like iron oxides with controllable phase were synthesized by using MIL-88A-templated pyrolysis under different atmospheres, thermal annealing in N₂ to obtain Fe₃O₄ and in air to obtain α-Fe₂O₃. Then, 2D/1D core-shell heterostructures (ZnIn₂S₄@Fe₃O₄ and ZnIn₂S₄@α-Fe₂O₃) were constructed by in-situ self-assembly strategy. Characterizations indicated that the 2D ultra-thin ZnIn₂S₄ shell wi ...
DOI:
10.1016/j.jhazmat.2020.122500

5. Anisole-modified hyper-cross-linked resins for efficient adsorption of aniline from aqueous solution

Author:
Zeng, Xu; Huang, Jianhan
Source:
Journal of colloid and interface science 2020 v.569 pp. 177-183
ISSN:
0021-9797
Subject:
surface area,   etc   ; adsorption; aniline; aqueous solutions; chemical reactions; oxygen; resins;     Show all 7 Subjects
Abstract:
... The development of functionalized hyper-cross-linked resins (HCLRs) with high Brunauer-Emmett-Teller (BET) surface area (SBET) is of great importance. Herein, a kind of anisole-modified HCLRs was fabricated by two successive Friedel-Crafts reactions and it was used for the adsorption of aniline from aqueous solution. The resultant HCLRs owned high SBET and plentiful oxygen (O), with the values of ...
DOI:
10.1016/j.jcis.2020.02.082

6. Effect of impregnation sequence of Pd/Ce/γ-Al2O3 sorbents on Hg0 removal from coal derived fuel gas

Author:
Huo, Qihuang; Yue, Caixia; Wang, Yahui; Han, Lina; Wang, Jiancheng; Chen, Shuai; Bao, Weiren; Chang, Liping; Xie, Kechang
Source:
Chemosphere 2020 v.249 pp. 126164
ISSN:
0045-6535
Subject:
surface area,   etc   ; aluminum oxide; coal; hydrogen sulfide; mercury; sorbents;     Show all 6 Subjects
Abstract:
... This study attempted to investigate the effect of impregnation sequence of the Pd/Ce/γ-Al₂O₃ sorbents on Hg⁰ removal. To this end, five kinds of sorbents were prepared and tested in simulated coal derived fuel gas (N₂–H₂–CO–H₂S–Hg), including Pd/γ-Al₂O₃, Ce/γ-Al₂O₃ and three kinds of Pd-based sorbents with Ce impregnation on γ-Al₂O₃ substrate. The tests were conducted at 250 and 300 °C respectivel ...
DOI:
10.1016/j.chemosphere.2020.126164

7. Mechanism of the temperature-responsive material regulating porous morphology on epoxy phenolic novolac resin microcapsule surface

Author:
Zhang, Xianpeng; Zhang, Luxia; Zhang, Daxia; Liu, Sisi; Wei, Dengguo; Liu, Feng
Source:
Colloids and surfaces 2020 v.593 pp. 124581
ISSN:
0927-7757
Subject:
surface area,   etc   ; encapsulation; epoxides; lipophilicity; phenols; solubility; strength (mechanics); temperature;     Show all 8 Subjects
Abstract:
... Porous microcapsules (MCs) with tailorable surface morphology are indispensable in practical applications because of their large surface area and controlled release. In this study, epoxy phenolic novolac resin MCs were prepared with temperature-responsive 2,4,6-tris(dimethylaminomethyl)phenol (DMP) as crosslinker. Reaction temperature was proved to generate distinct effects on MC porous morphology ...
DOI:
10.1016/j.colsurfa.2020.124581

8. Post-annealed graphite carbon nitride nanoplates obtained by sugar-assisted exfoliation with improved visible-light photocatalytic performance

Author:
Liu, Wei; Yanase, Takashi; Iwasa, Nobuhiro; Mukai, Shin; Iwamura, Shinichiro; Nagahama, Taro; Shimada, Toshihiro
Source:
Journal of colloid and interface science 2020 v.567 pp. 369-378
ISSN:
0021-9797
Subject:
surface area,   etc   ; carbon nitride; graphene; heat treatment; light; nitrogen; photocatalysis;     Show all 7 Subjects
Abstract:
... Two-dimensional (2D) graphitic carbon nitride (g-C₃N₄) nanoplates (CNNP) have become a hot research topic in photocatalysis due to their small thickness and large specific surface area that favors charge transport and catalytic surface reactions. However, the wide application of 2D g-C₃N₄ nanoplates prepared by ordinary methods suffers from increased band gaps with a poor solar harvesting capabili ...
DOI:
10.1016/j.jcis.2020.02.031

9. Tuning solid–air interface of porous graphene paper for enhanced electromagnetic interference shielding

Author:
Lan, Chuntao; Zou, Lihua; Qiu, Yiping; Ma, Ying
Source:
Journal of materials science 2020 v.55 no.15 pp. 6598-6609
ISSN:
0022-2461
Subject:
surface area,   etc   ; electromagnetic interference; electromagnetic radiation; graphene; guidelines; paper;     Show all 6 Subjects
Abstract:
... Electromagnetic interference (EMI) shielding materials with high performance and low density are urgently needed with the rapid development of electronic communications. In this work, tuning solid–air interface of graphene paper was carried out to enhance multiple reflections of incident electromagnetic waves for high-performance EMI shielding. The large amount solid–air interface (57.8 m² g⁻¹) en ...
DOI:
10.1007/s10853-020-04433-9

10. Synthesis of nitrogen-doped porous hollow carbon nanospheres with a high nitrogen content: A sustainable synthetic strategy using energetic precursors

Author:
Deng, Peng; Jiao, Qingjie; Ren, Hui
Source:
The Science of the total environment 2020 v.714 pp. 136725
ISSN:
0048-9697
Subject:
surface area,   etc   ; carbon; carbonization; nanospheres; nitrogen content; pollution; risk; temperature;     Show all 8 Subjects
Abstract:
... Improving the recovery and utilization efficiency of obsolete energetic materials (EMs) is essential for addressing environmental pollution. In this sense, a sustainable one-step high-temperature carbonization strategy using 2,2′,4,4′,6,6′-hexanitrostilbene-based (HNS-based) energetic hollow nanospheres as energetic precursors was used to fabricate nitrogen-doped (N-doped) porous hollow carbon nan ...
DOI:
10.1016/j.scitotenv.2020.136725

11. Effect of shape and size of filler particle on the aggregation and sedimentation behavior of the polymer composite

Author:
Samal, Sneha
Source:
Powder technology 2020 v.366 pp. 43-51
ISSN:
0032-5910
Subject:
surface area,   etc   ; iron; mechanical properties; particle size; polymers; silicon;     Show all 6 Subjects
Abstract:
... The agglomeration and sedimentation tendency of iron fillers with different particle size, shape, and the specific area was investigated by means of microstructural observation. The distribution of filler particles within polymer composite was investigated by the agglomeration and sedimentation tendency. The effect of regular and irregular fillers particles was considered in the silicon based poly ...
DOI:
10.1016/j.powtec.2020.02.054

12. Gaseous flow through coarse granular beds: The role of specific surface area

Author:
Buchwald, Thomas; Schmandra, Gregor; Schützenmeister, Lieven; Fraszczak, Tony; Mütze, Thomas; Peuker, Urs
Source:
Powder technology 2020 v.366 pp. 821-831
ISSN:
0032-5910
Subject:
surface area,   etc   ; equations; image analysis; microscopy; models; surface roughness;     Show all 6 Subjects
Abstract:
... The Ergun equation is commonly used to predict velocity-pressure drop behaviour in packed beds. For many particular systems, the measurements deviate significantly from this relationship. Because of this, the equation is often treated as a purely empirical relationship, and its factors as fit parameters.This paper shows that the physics-based model underlying the Ergun equation should be treated b ...
DOI:
10.1016/j.powtec.2020.03.028

13. New perspectives on capturing particle agglomerates in CFD modeling of spray dryers

Author:
Jubaer, Hasan; Dai, Rui; Ruslim, Erwin; Mansouri, Shahnaz; Shan, Zhihua; Woo, Meng Wai
Source:
Drying technology 2020 v.38 no.5-6 pp. 685-694
ISSN:
1532-2300
Subject:
surface area,   etc   ; dryers; fluid mechanics; models; spray drying;     Show all 5 Subjects
Abstract:
... Current computational fluid dynamic (CFD) models of spray dryers lack the capability to predict the structure of the agglomerates formed; loose or compact agglomerates. This is mainly due to the conventional simplistic approach in numerically “fusing” of the colliding particles forming the agglomerate. A new theoretical treatment is introduced in this work, suitable for implementation in CFD simul ...
DOI:
10.1080/07373937.2019.1691585

14. An intermittent microwave-exfoliated non-expansive graphite oxide process for highly-efficient production of high-quality graphene

Author:
Zou, Xuefeng; Hao, Jiangyu; Qiang, Yujie; Xiang, Bin; Liang, Xinyue; Shen, Hujun
Source:
Journal of colloid and interface science 2020 v.565 pp. 288-294
ISSN:
0021-9797
Subject:
surface area,   etc   ; capacitance; electrochemical capacitors; graphene; solvents; washing;     Show all 6 Subjects
Abstract:
... Redox methods represented by Hummers’ method are the most frequently-used pathways to prepare graphene, but to date still very low-efficient, because of its time-consuming washing and hard reduction process. Here we report an intermittent microwave-exfoliated non-expansive graphite oxide (GtO) process to prepare a wrinkled graphene with a high reduction degree (C/O: 19.0), a high defect degree, an ...
DOI:
10.1016/j.jcis.2020.01.039

15. 3D multifractal characterization of computed tomography images of soils under different tillage management: Linking multifractal parameters to physical properties

Author:
Soto-Gómez, Diego; Pérez-Rodríguez, Paula; Vázquez Juíz, Laura; Paradelo, Marcos; López-Periago, J. Eugenio
Source:
Geoderma 2020 v.363 pp. 114129
ISSN:
0016-7061
Subject:
surface area,   etc   ; bulk density; computed tomography; macropores; solutes; tillage; topology;     Show all 7 Subjects
Abstract:
... Multifractal analysis of pore images obtained from X-ray computed tomography (CT) was used to characterize the scaling properties of macropores in soils with different managements and their correspondence with macroscopic physical properties related with the soil functions.We used CT images of twenty undisturbed soil columns to examine the multifractal properties of the pores identified by X-ray c ...
DOI:
10.1016/j.geoderma.2019.114129

16. Improvement on flowability and fluidization of Group C particles after nanoparticle modification

Author:
Han, Mengqi; Zhou, Yandaizi; Zhu, Jesse
Source:
Powder technology 2020 v.365 pp. 208-214
ISSN:
0032-5910
Subject:
surface area,   etc   ; additives; angle of repose; cohesion; industry; nanoparticles;     Show all 6 Subjects
Abstract:
... Group C particles have gradually become more desirable in the industry in recent years because of their special characteristics such as large specific surface area and small size. However, their poor flowability is the biggest challenge in applications. Nanoparticles, as flow additives, could significantly improve flowability of Group C particles. In this project, powder flowability was measured u ...
DOI:
10.1016/j.powtec.2019.07.026

17. Sensors design based on hybrid gold-silica nanostructures

Author:
Bagheri, Elnaz; Ansari, Legha; Sameiyan, Elham; Abnous, Khalil; Taghdisi, Seyed Mohammad; Ramezani, Mohammad; Alibolandi, Mona
Source:
Biosensors & bioelectronics 2020 v.153 pp. 112054
ISSN:
0956-5663
Subject:
surface area,   etc   ; biosensors; chemical species; nanogold; optical properties; porosity; silica;     Show all 7 Subjects
Abstract:
... Hybrid silica-gold based sensors show attractive performance in sensing technologies. Due to their interesting optical properties and biological compatibility, gold nanoparticles (AuNPs) have been extensively implemented in sensing technology.Hybridization of AuNPs with silica NPs as a material with unique characteristic comprising large surface area, narrow pore distribution, tunable pore size an ...
DOI:
10.1016/j.bios.2020.112054

18. Advance Study of Cellulose Nanocrystals Properties and Applications

Author:
Aziz, Tariq; Fan, Hong; Zhang, Xianwei; Haq, Fazal; Ullah, Asmat; Ullah, Roh; Khan, Farman Ullah; Iqbal, Mudassir
Source:
Journal of polymers and the environment 2020 v.28 no.4 pp. 1117-1128
ISSN:
1566-2543
Subject:
surface area,   etc   ; adhesives; cellulose; coatings; humans; hydrophilicity; nanocrystals; solvents;     Show all 8 Subjects
Abstract:
... Cellulose nanocrystals (CNCs) received great attention in various fields, because of their high efficacy, high aspect ratio, low density, renewability and non-toxicity which make them ideal candidates. Here, various properties and applications especially, thermal, mechanical, adhesives, coatings etc., to introduce CNCs, a hydrophilic and colloidally stable, rigid rod-shaped bio-based nanomaterial ...
DOI:
10.1007/s10924-020-01674-2

19. Biomass-derived porous carbon electrodes for high-performance supercapacitors

Author:
Sun, Yao; Xue, Jianjun; Dong, Shengyang; Zhang, Yadi; An, Yufeng; Ding, Bing; Zhang, Tengfei; Dou, Hui; Zhang, Xiaogang
Source:
Journal of materials science 2020 v.55 no.12 pp. 5166-5176
ISSN:
0022-2461
Subject:
surface area,   etc   ; capacitance; carbon; carbon electrodes; electrochemical capacitors; electrolytes; nitrogen;     Show all 7 Subjects
Abstract:
... Biomass-derived porous carbon materials have been receiving considerable attention in energy-storage devices by virtue of the abundant and renewable sources. In this work, we developed a facile, yet scalable fabrication of nitrogen doping porous carbon (QPC-3) with high specific surface area (SSA) of 2597 m² g⁻¹ derived from quinoa. The QPC-3 electrode exhibits a special capacitance of 330 F g⁻¹ i ...
DOI:
10.1007/s10853-019-04343-5

20. Applying the FDS pyrolysis model to predict heat release rate in small-scale forced ventilation tunnel experiments

Author:
Wang, Xiaoyun; Fleischmann, Charles; Spearpoint, Michael
Source:
Fire safety journal 2020 v.112 pp. 102946
ISSN:
0379-7112
Subject:
surface area,   etc   ; burning; fuel combustion; fuels; heat; models; prediction; pyrolysis;     Show all 8 Subjects
Abstract:
... The pyrolysis model in FDS6 is applied to simulate a series of small-scale tunnel experiments under varied forced ventilation velocities, where cribs made of medium density fireboard (MDF) are used as the fuel source. Prior to the simulations the material properties of MDF are investigated in order to effectively describe the decomposition behaviour in FDS6 and to develop optimised values. In the ...
DOI:
10.1016/j.firesaf.2020.102946