Materials Literature
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Benefiting from the natural nano-size graphene-structure in natural asphaltene material, a facile one-pot route, mild chemical oxidation of low-value petroleum asphaltene followed by routine ammonium neutralization, is presented to produce high quality graphene quantum dots (GQDs). The asphaltene-derived GQDs possess…
Abstract The present study investigated the efficiency and mechanisms of aqueous Pb(II), Cd(II), Zn(II) and As(V) adsorption on natural (H), calcined (HC), and acid-activated halloysite (HA). The XRD and FTIR measurements indicated that the aluminosilicate framework was not affected by high-temperature treatment, in c…
A series of mono-substituted pyrene derivatives having a pyrene mesogenic core and aldehyde group peripherals were designed and synthesized, which had typical D-[Formula: see text]-A structures. Photophysical properties of the compounds were characterized by UV/Vis spectroscopy and the third-order nonlinearities of th…
Density functional theory (DFT) is a powerful tool to study heterogeneous catalysis nowadays. In past decades, numerous DFT calculations have been conducted to investigate the mechanism of catalytic reaction from which the rationale of catalyst design can be revealed. Because the catalyst electronic and geometric stru…
The lithium sodium borate glasses doped with Eu3+ ion are prepared using melt quenching technique, their structural and optical properties have been evaluated. The density of prepared glasses exhibits an inverse behavior to the molar volume ranging from 2.26 g/cm3 to 2.43 g/cm3 and 26.95 cm3/mol to 26.20 cm3/mol, resp…
Abstract Hybrid materials based on halloysite nanotubes (HNT) and cucurbit[8]uril (CB[8]) were prepared with the aim to obtain efficient nanosponges towards hydrocarbons both in liquid and vapor phases. The loading on both HNT surfaces and the hybrid morphology were evidenced by FTIR spectroscopy, thermogravimetric an…
제철소에서 부생되는 LDG (Linze Donawitz gas) 가스는 일산화탄소(CO)를 60% 이상 포함한다. LDG로부터 CO를 고순도로 분리하는 2가지 공정을 고려하였다: COSORB와 CO-PSA (pressure swing adsorption). 이 연구의 목적은 기술경제성평가(TEA: techno-economic analysis)를 통하여 이 두 공정 중 어떤 공정이 더 경제성이 높은 지를 결정하는 하는 것이었다. TEA의 기술적 측면에서는 초기투자비(TCI: total capital investment)와 총생산비용(TPC: total producti…
In this study, silver nanoparticles (AgNPs) were synthesized for the first time using an antibacterial endophytic fungus of Chinese medicinal herb Orchidantha chinensis, which has anti-inflammatory and antimicrobial activities. The AgNPs were analyzed by various characterization techniques to reveal their morphology,…
Increasingly demanding exhaust emissions regulations require that automotive three-way catalysts (TWC) must exhibit excellent catalytic activity and durability. Thus, developing TWC based on an accurate understanding of deactivation mechanisms is critical. This work briefly reviews thermally induced deactivation mecha…
On-line partial discharge (PD) detection and location has proven to be a valuable tool for assessing the condition of medium-voltage (MV) power cables in service. A few advances are discussed in this paper. It is of importance to know all factors affecting PD activity in order to judge its severity. Cable temperature,…
Abstract Hematite and goethite in soils are often aluminum (Al) substituted, which can dramatically change their reflectance and magnetic properties and bias abundance estimates using diffuse reflectance spectroscopy (DRS) and magnetic techniques. In this study, synthetic Al‐substituted hematites and goethites and two…
UV imager has promising application prospect in the detection of corona discharge because of its advantages, such as high sensitivity, intuitive and non-contact discharge detection. In order to make better use of ultraviolet imager to detect corona of the high voltage electrical equipment, experiments are carried out…
Time reversal dictates that nonmagnetic, centrosymmetric crystals cannot be spin-polarized as a whole. However, it has been recently shown that the electronic structure in these crystals can in fact show regions of high spin-polarization, as long as it is probed locally in real and in reciprocal space. In this article…
The paper, prepared by CIGRE WG D1.25, presents the experience in practical application of sensitivity verification of the UHF partial discharge detection system for GIS after its introduction by ELECTRA Report in 1999. A detailed description of the two-step procedure, Step 1 in laboratory and Step 2 on-site, is given…
The interfaces of metal–dye molecule–semiconductor sandwich structure are very important in the investigation of dye-sensitized solar cells (DSSCs) where metals are used to enhance absorption. In this work, we first designed and synthesized Ag/N719 and Ag/N719/TiO 2 sandwich systems to investigate the chemical binding…
Abstract Chitins and chitosans are some of the most abundant natural polysaccharide materials, and are used to increase innate immune response and disease resistance in humans and animals. In this work, chitin and chitosan from housefly, Musca domestica, pupa shells were obtained by treatment with HCl and NaOH. For ch…
Despite the worldwide interest generated by periodic mesoporous organosilica (PMO) bulk materials, the design of PMO nanomaterials with controlled morphology remains largely unexplored and their properties unknown. In this work, we describe the first study of PMO nanoparticles (NPs) based on meta-phenylene bridges, an…
As an emerging field, nanotoxicology is gaining significant interest from scientists as well as from international regulatory firms in an attempt to build accumulated knowledge on this topic, which will be the basis for regulatory codes and safer nanotechnology. However, conflicting results and findings are abundant i…
This paper investigates the nonlinear interaction between a violent bubble and an air-backed plate with a circular hole. A numerical model is established using the incompressible potential theory coupled with the boundary integral method. A double-node technique is used to solve the overdetermined problem caused by th…
This paper discusses the influence of material strain and strain rate on efficiency and temperature span of elastocaloric cooling processes. The elastocaloric material, a newly developed quaternary Ni-Ti-Cu-V alloy, is characterized at different maximum strains and strain rates. The experiments are performed with a sp…