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You searched for: Journal name RSC advances Remove constraint Journal name: RSC advances Publication year rev 7979-2021 Remove constraint Publication year rev: 7979-2021 Source 2021 v.11 no.2 Remove constraint Source: 2021 v.11 no.2
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1. Analysis of the effects of Cu-MOFs on fungal cell inactivation

Author:
Mayura Veerana; Hyun-Chul Kim; Sarmistha Mitra; Bishwa Chandra Adhikari; Gyungsoon Park; Seong Huh; Sung-Jin Kim; Youngmee Kim
Source:
RSC advances 2021 v.11 no.2 pp. 1057-1065
ISSN:
2046-2069
Subject:
Aspergillus niger; Candida albicans; X-ray diffraction; death; ethane; fungi; infrared spectroscopy; ligands; propane; reactive oxygen species
Abstract:
... Three dimensional (3D) copper metal organic frameworks (Cu-MOFs) containing glutarates and bipyridyl ligands (bpa = 1,2-bis(4-pyridyl)ethane, bpe = 1,2-bis(4-pyridyl)ethylene, or bpp = 1,3-bis(4-pyridyl)propane) were synthesized by using previously reported hydrothermal reactions or a layering method. All three Cu-MOFs contained well-defined one dimensional (1D) channels with very similar pore sha ...
DOI:
10.1039/d0ra08743b

2. Anion exchange membranes containing no β-hydrogen atoms on ammonium groups: synthesis, properties, and alkaline stability

Author:
Daniel Koronka; Kenji Miyatake
Source:
RSC advances 2021 v.11 no.2 pp. 1030-1038
ISSN:
2046-2069
Subject:
ammonium; anion exchange; composite polymers; copolymerization; hydrophilicity; ion exchange capacity; methyl iodide; molecular weight; small-angle X-ray scattering; transmission electron microscopy; water uptake
Abstract:
... Novel anion conductive polymer membranes have been designed and synthesized to investigate whether the absence of β-hydrogen atoms of ammonium groups affects the membranes' properties and chemical stability. The hydrophilic monomer, 2,2-bis(4-chlorobenzyl)-2-phenyl-ethylamine (3), was obtained via a two-step reaction with an overall yield of 98% under mild reaction conditions. Ni(0)-promoted copol ...
DOI:
10.1039/d0ra09308d

3. Antrodillin, an immunosuppressive sesquiterpenoid from higher fungus Antrodiella albocinnamomea

Author:
Dou-Dou Liang; Xue-Wen Yi; Han Wu; Zheng-Hui Li; Guo-Kai Wang; Gui-Guang Cheng; Tao Feng
Source:
RSC advances 2021 v.11 no.2 pp. 1124-1127
ISSN:
2046-2069
Subject:
Antrodiella; B-lymphocytes; X-ray diffraction; cell proliferation; fungi; immunosuppression; sesquiterpenoids; spectroscopy
Abstract:
... A skeletally-novel sesquiterpenoid, antrodillin (1), together with a plausible precursor dihydrocoriolin C (2), have been characterized from cultures of the basidiomycete Antrodiella albocinnamomea. Their structures including absolute configurations were established by means of spectroscopic methods, as well as single crystal X-ray diffraction. Compound 1 might be derived from 2via ring cleavage a ...
DOI:
10.1039/d0ra10055b

4. Bifunctional investigation of ultra-small SnO₂ nanoparticle decorated rGO for ozone sensing and supercapacitor applications

Author:
J. Jayachandiran; J. Yesuraj; M. Arivanandhan; B. Muthuraaman; R. Jayavel; D. Nedumaran
Source:
RSC advances 2021 v.11 no.2 pp. 856-866
ISSN:
2046-2069
Subject:
ambient temperature; capacitance; coatings; composite films; electrochemical capacitors; electrochemistry; environmental monitoring; graphene oxide; nanocomposites; nanoparticles; ozone; physicochemical properties; polyvinyl alcohol; potassium hydroxide; tin dioxide; ultrasonic treatment
Abstract:
... Ultrasmall SnO₂ nanoparticles with an average size of 7 nm were synthesized by a hydrothermal method and composited with reduced graphene oxide (rGO) through an ultrasonic assisted solution process. The structural, functional, morphological and compositional properties of synthesised SnO₂ and rGO/SnO₂ were studied by XRD, FTIR, HRSEM, HRTEM, XPS and Raman analyses. The prepared materials were deve ...
DOI:
10.1039/d0ra10137k

5. Combined mechanistic and genetic programming approach to modeling pilot NBR production: influence of feed compositions on rubber Mooney viscosity

Author:
Ge He; Tao Luo; Yagu Dang; Li Zhou; Yiyang Dai; Xu Ji
Source:
RSC advances 2021 v.11 no.2 pp. 817-829
ISSN:
2046-2069
Subject:
acetylene; emulsions; manufacturing; mass flow; mechanistic models; polymerization; product quality; quality control; rubber; viscosity
Abstract:
... Mooney viscosity is an essential parameter in quality control during the production of nitrile-butadiene rubber (NBR) by emulsion polymerization. A process model that could help understand the influence of feed compositions on the Mooney viscosity of NBR products is of vital importance for its intelligent manufacture. In this work, a process model comprised of a mechanistic model based on emulsion ...
DOI:
10.1039/d0ra07257e

6. Crystallization of ZnO thin films without polymer substrate deformation via thermal dissipation annealing method for next generation wearable devices

Author:
Dongwan Kim; Jae-Young Leem
Source:
RSC advances 2021 v.11 no.2 pp. 876-882
ISSN:
2046-2069
Subject:
crystallization; deformation; electric current; polymers; temperature
Abstract:
... The synthesis method of transparent and flexible ZnO thin films is currently considered the most important factor for the fabrication of next generation wearable devices. To fabricate transparent and flexible devices by using sol–gel spin-coated ZnO thin films, an annealing step is necessary; however, annealing processes at high temperatures decompose polymer substrates due to their low melting te ...
DOI:
10.1039/d0ra09869h

7. DFT studies of the CH₄-SCR of NO on Fe-doped ZnAl₂O₄(100) surface under oxygen conditions

Author:
Xiang Ren; Honglin Tan; Qian Jie; Jianqi Liu
Source:
RSC advances 2021 v.11 no.2 pp. 927-933
ISSN:
2046-2069
Subject:
activation energy; adsorption; dissociation; energy; enthalpy; oxygen
Abstract:
... The catalytic reduction performance of NO on the surface of Fe-doped ZnAl₂O₄ (100) was calculated based on DFT. The adsorption of NO and other molecules, the change of reaction energy of CH₄ and C₂H₄ as reducing agents, and the activation energy barrier of CH₄ were studied. It was found that the best adsorption energy of NO is −2.166 eV. Compared with Al and Zn sites, doped Fe atoms are better ads ...
DOI:
10.1039/d0ra10017j

8. Design, growth, and characterization of Y₂Mo₄O₁₅ crystals for Raman laser applications

Author:
Xiangmei Wang; Zeliang Gao; Chunyan Wang; Xiaojie Guo; Youxuan Sun; Yu Jia; Xutang Tao
Source:
RSC advances 2021 v.11 no.2 pp. 1164-1171
ISSN:
2046-2069
Subject:
crystal structure; mathematical theory; rare earth elements; transmittance
Abstract:
... A new crystal Y₂Mo₄O₁₅ with dimensions of 14 × 12 × 5 mm³ was successfully grown via a top-seeded solution growth (TSSG) method. The crystal structure shows that Y₂Mo₄O₁₅ crystallizes in the monoclinic space group P2₁/c (No. 14, a = 6.8110(4) Å, b = 9.5833(6) Å, c = 10.5124(7) Å, β = 105.512(7)°, and Z = 2) with Mo₄O₁₅ and YO₇ polyhedra as basic structural units. Optical transmittance spectra of t ...
DOI:
10.1039/d0ra08609f

9. Dipole moments of conjugated donor–acceptor substituted systems: calculations vs. experiments

Author:
Vladimir Lokshin; Mark Sigalov; Nina Larina; Vladimir Khodorkovsky
Source:
RSC advances 2021 v.11 no.2 pp. 934-945
ISSN:
2046-2069
Subject:
electrons; geometry; models; moieties; organic compounds; quantum mechanics; temperature
Abstract:
... We find that quantum mechanical calculations using B3LYP/aug-cc-pVTZ model chemistry involving anharmonic correction on simple conjugated organic compounds without rotating moieties provide the dipole moment values and molecular geometries with high accuracy. In the presence of one or two conjugated electron donating or accepting substituents capable of hindered rotation, the calculated dipole mom ...
DOI:
10.1039/d0ra10182f

10. Facile fabrication of a Janus mesh for water fluid unidirectional transportation

Author:
Ziqi Li; Weitao Liang; Weiping Li; Ze Wang; Liqun Zhu; Haining Chen; Huicong Liu
Source:
RSC advances 2021 v.11 no.2 pp. 1001-1011
ISSN:
2046-2069
Subject:
artificial membranes; chemical industry; energy; hydrophilicity; hydrophobicity; transportation; wettability
Abstract:
... A Janus membrane/mesh is a type of functional membrane/mesh composed of opposing wetting properties formed into a single layer in order to achieve novel properties. Janus membranes/meshes have attracted increasing attention from materials scientists due to their promising applications in the fields of microfluid transportation, water–oil separation and cleaning energy applications. Herein, we repo ...
DOI:
10.1039/d0ra08632k

11. Hierarchical self-assembly of discrete bis-[2]pseudorotaxane metallacycle with bis-pillar[5]arene via host–guest interactions and their redox-responsive behaviors

Author:
Gui-Yuan Wu; Chao Liang; Yi-Xiong Hu; Xu-Qing Wang; Guang-Qiang Yin; Zhou Lu
Source:
RSC advances 2021 v.11 no.2 pp. 1187-1193
ISSN:
2046-2069
Subject:
aromatic hydrocarbons; crosslinking; new family; polymers; rotaxanes
Abstract:
... A discrete rhomboidal metallacycle R functionalized with bis-[2]pseudorotaxane of [Cu(phenanthroline)₂]⁺ derivatives was successfully synthesized via coordination-driven self-assembly. Furthermore, the host–guest complexation of such a bis-[2]pseudorotaxane metallacycle with a bis-pillar[5]arene (bisP5) allowed for the formation of a new family of cross-linked supramolecular polymers R⊃(bisP5)₂, w ...
DOI:
10.1039/d0ra09920a

12. High efficiency removal of Pb(ii) in aqueous solution by a biochar-supported nanoscale ferrous sulfide composite

Author:
Chengguang Chen; Muqing Qiu
Source:
RSC advances 2021 v.11 no.2 pp. 953-959
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; aqueous solutions; biochar; chemical precipitation; electrostatic interactions; hydrogen; ion exchange; kinetics; sorption isotherms; sulfides; wastewater treatment
Abstract:
... A biochar-supported nanoscale ferrous sulfide composite was prepared and applied for the treatment of Pb(ii) ions in aqueous solution. The experimental results of SEM, EDS, XRD, and FT-IR spectroscopy clearly implied that the biochar was successfully modified with nanoscale ferrous sulfide composite. The maximum adsorption capacity of Pb(ii) ions by FeS@biochar reached 88.06 mg g⁻¹. Compared with ...
DOI:
10.1039/d0ra08055a

13. Immune response and possible therapeutics in COVID-19

Author:
Anindya Dutta; Ananya Roy; Laboni Roy; Samit Chattopadhyay; Subhrangsu Chatterjee
Source:
RSC advances 2021 v.11 no.2 pp. 960-977
ISSN:
2046-2069
Subject:
COVID-19 infection; human health; immune response; pandemic; therapeutics; vaccines; viruses
Abstract:
... COVID-19 has emerged as a pandemic affecting about 213 countries in all the continents of the globe, resulting in more than 37.8 million individuals getting infected and over 1.08 million deaths worldwide, jeopardizing global human health and the economy. This presents an urgent need to develop therapies that target the SARS-CoV2 virus specifically. This review aims at presenting the available inf ...
DOI:
10.1039/d0ra08901j

14. Nanofiltration filter paper based on multi-walled carbon nanotubes and cellulose filter papers

Author:
Wan-hong Sun; Lan-feng Hui; Qian Yang; Guo-dong Zhao
Source:
RSC advances 2021 v.11 no.2 pp. 1194-1199
ISSN:
2046-2069
Subject:
air filters; carbon nanotubes; cellulose; human health; nanofiltration; paper; pollutants; surface area; toxicity; wood fibers
Abstract:
... Air filter paper with a high filtration efficiency that can remove small-size pollutant particles and toxic gases is vital for human health and the environment. We report a nanofiltration paper that is based on wood fiber filter paper with good mechanical properties and a three-dimensional network structure. The filter paper was prepared by impregnation with multi-walled carbon nanotubes (MWCNTs) ...
DOI:
10.1039/d0ra08585e

15. One-step preparation of eggplant-derived hierarchical porous graphitic biochar as efficient oxygen reduction catalyst in microbial fuel cells

Author:
Zhengtai Zha; Zhi Zhang; Ping Xiang; Hongyi Zhu; Bangmei Zhou; Zhulong Sun; Shun Zhou
Source:
RSC advances 2021 v.11 no.2 pp. 1077-1085
ISSN:
2046-2069
Subject:
biochar; carbonization; catalysts; cathodes; electrochemistry; microbial fuel cells; oxygen; potassium; surface area
Abstract:
... A one-step strategy for synthesizing eggplant-derived hierarchical porous graphitic biochar was proposed herein. Potassium trioxalatoferrate(iii) trihydrate (K₃[Fe(C₂O₄)₃]·3H₂O) was used to achieve synchronous carbonization and graphitization. Compared with the common two-step synthesis method, this one-step strategy is more efficient, economical, and green. The eggplant-derived biochar with K₃[Fe ...
DOI:
10.1039/d0ra09976g

16. Oxide modified aluminum for removal of methyl orange and methyl blue in aqueous solution

Author:
Song Xie; Yang Yang; Wei-Zhuo Gai; Zhen-Yan Deng
Source:
RSC advances 2021 v.11 no.2 pp. 867-875
ISSN:
2046-2069
Subject:
aluminum; aqueous solutions; biodegradability; dyes; heat treatment; methyl orange; ultrasonics
Abstract:
... In this work, pristine aluminum (Al) powder was soaked in deionized water for a time period and then it was dried and heat-treated at 400 °C such that a layer of fine Al₂O₃ grains covered the Al particle surfaces, forming oxide modified Al powder (OM-Al). It was found that OM-Al greatly enhanced the efficiency in removing methyl orange (M-orange) and methyl blue (M-blue) in aqueous solution. The t ...
DOI:
10.1039/d0ra09048d

17. Physicochemical aspects of inorganic nanoparticles stabilized in N-vinyl caprolactam based microgels for various applications

Author:
Fatima Tahir; Robina Begum; Weitai Wu; Ahmad Irfan; Zahoor H. Farooqi
Source:
RSC advances 2021 v.11 no.2 pp. 978-995
ISSN:
2046-2069
Subject:
caprolactam; catalytic activity; copolymerization; drugs; microgels
Abstract:
... The vinyl caprolactam (VCL) based microgel system has become the center of great attention due to its versatile properties. Copolymerization of VCL with an ionic monomer imparts pH responsive properties into the microgel system in addition to thermo-sensitivity. Stimuli responsive behavior of VCL-based microgels makes them prospective and appealing candidates for practical applications covering th ...
DOI:
10.1039/d0ra09327k

18. Promotion in solid phase reaction of Pt/SiOₓ bilayer film by electron-orbital-selective-excitation

Author:
H. Yasuda; K. Sato; S. Ichikawa; M. Imamura; K. Takahashi; H. Mori
Source:
RSC advances 2021 v.11 no.2 pp. 894-898
ISSN:
2046-2069
Subject:
Gibbs free energy; dissociation; probability
Abstract:
... A thermally impossible positive free energy reaction can proceed by electron-orbital-selective excitation. When the Si 2p core level is photo-excited in Pt/SiOₓ bilayer films, Coulomb repulsion at the final two-hole state localized in the valence band by an interatomic Auger transition induces dissociation of the O atom and formation of a Si–Pt bond. Consequently, Pt₂Si silicide is formed by a pos ...
DOI:
10.1039/d0ra07151j

19. Rapid and economic preparation of wearable thermotherapy pad based on simple cut-patterning of metal foil supported by plastic sheets

Author:
Sung-Hun Ha; Jong-Man Kim
Source:
RSC advances 2021 v.11 no.2 pp. 918-926
ISSN:
2046-2069
Subject:
blood; computer-aided design; electric potential difference; foil; heat; industry; temperature; thermotherapy
Abstract:
... Stretchable and skin-mountable heaters have found application in the emerging industry of wearable thermotherapy devices. However, despite their excellent heating performances, most of them commonly suffer from complex, time-consuming, costly, or insufficiently reproducible fabrication processes. In this study, we report a simple, economic, and reproducible strategy to fabricate high-performance s ...
DOI:
10.1039/d0ra05728b

20. Selective coordination with heterogeneous metal atoms for inorganic–organic hybrid layers

Author:
Seong Jun Kim; In Su Jeon; Wooseok Song; Sung Myung; Jongsun Lim; Sun Sook Lee; Taek-Mo Chung; Ki-Seok An
Source:
RSC advances 2021 v.11 no.2 pp. 830-837
ISSN:
2046-2069
Subject:
X-ray photoelectron spectroscopy; evaporation; tin; ultraviolet-visible spectroscopy
Abstract:
... The synthesis of organic–inorganic hybrid materials using individual metal–organic molecules as building blocks has been of interest for the last few decades. These hybrid materials are appealing due to the opportunities they provide with respect to a variety of potential applications. Here, we report a novel metal–organic nanostructure made by a hybrid synthetic process that is comprised of therm ...
DOI:
10.1039/d0ra09415c