An Investigation of the Efficient-Precise Continuous Electrochemical Grinding Process of Ti-6Al-4V.

Titanium alloys have many excellent characteristics, and they are widely used in aerospace, biomedicine, and precision engineering. Meanwhile, titanium alloys are difficult to machine and passivate readily. Electrochemical grinding (ECG) is an ideal technology for the efficient-precise machining of titanium alloys.

Effect of Bimetal Element Doping on the Low-Temperature Activity of Manganese-Based Catalysts for NH-SCR.

A series of novel MnZrCo denitrification catalysts were prepared by the co-precipitation method. The effect of co-modification of MnO catalyst by zirconium and cobalt on the performance of NH-SCR was studied by doping transition metal cobalt into the MnZr catalyst. The ternary oxide catalyst MnZrCo can reach about 90% of NO conversion in a reaction temperature range of 100-275°C, and the best NO conversion can reach up to 99%.

Selective catalytic reduction of NO by low-temperature NH over Mn Zr mixed-oxide catalysts.

Mn Zr series catalysts were prepared by a coprecipitation method. The effect of zirconium doping on the NH-SCR performance of the MnO catalyst was studied, and the influence of the calcination temperature on the catalyst activity was explored. The results showed that the MnZr catalyst exhibited good NH-SCR activity when calcined at 400 °C.

Kinetic Analysis of Laminar Combustion Characteristics of a H/Cl Mixture at CO/N Dilution.

Garbage and biomass contain more chlorine, which reacts with H to form HCl gas during combustion or gasification, resulting in corrosion of metal walls. In this paper, based on the chlorine mechanism in Ansys Chemkin-Pro, the laminar combustion characteristics of H/Cl are simulated with different diluents CO/N under an initial temperature of 298 K, equivalence ratio range of 0.6-1.

Effect of Indium Addition on the Low-Temperature Selective Catalytic Reduction of NO by NH over MnCeO Catalysts: The Promotion Effect and Mechanism.

A MnCeInO catalyst was prepared by a coprecipitation method for denitrification of NH-SCR (selective catalytic reduction). The catalysts were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry, scanning electron microscopy, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller analysis, H temperature-programmed reduction, and NH temperature-programmed desorption. The NH-SCR activity and HO and SO resistance of the catalysts were evaluated.

Numerical Simulation of the Effect of CH/CO Concentration on Combustion Characteristics of Low Calorific Value Syngas.

The composition of low calorific value synthesis gas varies greatly depending on the raw material and processing technology, which makes the combustion extremely complicated. The three mechanisms of the GRI-Mech 3.0, Li-Model, and FFCM-Mech are used to numerically simulate CH/CO/H/N air premixed combustion by using ANSYS CHEMKIN-PRO.

Plasma-Assisted Controllable Doping of Nitrogen into MoS Nanosheets as Efficient Nanozymes with Enhanced Peroxidase-Like Catalysis Activity.

Heteroatom doping is one of the effective ways to improve the catalytic performances of nanozymes. In the present work, the plasma-assisted controllable doping of nitrogen (N) into MoS nanosheets has been initially proposed, resulting in efficient nanozymes. The so-obtained nanozymes were characterized separately by TEM, XRD, XPS, and FTIR.

Synergetic AgS and ZnS quantum dots as the sensitizer and recognition probe: A visible light-driven photoelectrochemical sensor for the "signal-on" analysis of mercury (II).

A visible-light-driven photoelectrochemical (PEC) sensor has been developed for the "signal-on" analysis of Hg by the synergetic combination of low-bandgap AgS and wide-bandgap ZnS quantum dots (QDs). AgS QDs were synthesized with bead-chain-like structure by the self-assembly route and further covalently bound with ZnS QDs to be coated onto the indium tin oxide (ITO) electrodes. It was discovered that the ZnS@AgS-modified electrodes could display the visible-light-driven PEC behavior, of which AgS and ZnS QDs could act as the PEC sensitizer and Hg-recognition probe, respectively.

InVO/β-AgVO Nanocomposite as a Direct Z-Scheme Photocatalyst toward Efficient and Selective Visible-Light-Driven CO Reduction.

Photocatalytic CO reduction to solar fuel is a promising route to alleviate the ever-growing energy crisis and global warming. Herein, to enhance photoconversion efficiency of CO reduction, a series of direct Z-scheme composites consisting of β-AgVO nanoribbons and InVO nanoparticles (InVO/β-AgVO) are prepared via a facile hydrothermal method and subsequent in situ growth process. The prepared InVO/β-AgVO composites exhibit enhanced photocatalytic activity for reduction of CO to CO under visible-light illumination.

Facile synthesis of ternary Ag/AgBr-Ag(2)CO(3) hybrids with enhanced photocatalytic removal of elemental mercury driven by visible light.

A novel technique for photocatalytic removal of elemental mercury (Hg(0)) using visible-light-driven Ag/AgBr-Ag2CO3 hybrids was proposed. The ternary Ag/AgBr-Ag2CO3 hybrids were synthesized by a simple modified co-precipitation method and characterized by N2 adsorption-desorption, scanning electron microscope (SEM), X-ray diffraction (XRD), UV-vis diffused reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) techniques. The effects of AgBr content, fluorescent lamp (FSL) irradiation, solution temperature, SO2 and NO on Hg(0) removal were investigated in detail.

Fe3-xCuxO4 as highly active heterogeneous Fenton-like catalysts toward elemental mercury removal.

A series of novel spinel Fe3-xCuxO4 (0 View Article and Find Full Text PDF

Structural evolution of maize stalk/char particles during pyrolysis.

The structural evolution characteristics of maize stalk/char particles during pyrolysis were investigated. The char was prepared by pyrolyzing at temperatures ranging from 200 to 900 degrees C. Maize stalk and chars were characterized by thermogravimetric analysis, ultimate analysis (TGA), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), helium density measurement and N(2) adsorption/desorption method.