B-Site modification of LaMn0.9Co0.1O3 perovskite using a selective dissolution method in C3H6 oxidation

2020 ◽  
Vol 10 (19) ◽  
pp. 6464-6467
Author(s):  
Zhan Liu ◽  
Zhengguo Li ◽  
Xuefeng Chu ◽  
Yuankai Shao ◽  
Kaixiang Li ◽  
...  
Keyword(s):  
Selective Dissolution ◽  
Catalytic Performance ◽  
Dissolution Method ◽  
C3h6 Oxidation ◽  
Co Doped

LaMnCoO3 is treated with HNO3 to generate a Co-doped MnO2 phase, which shows better catalytic performance than LaMnO3 and pure MnO2 catalysts for C3H6 oxidation.

Preparation of Novel Ag–Si–TiO2 Composite and Research on Its Photocatalytic Degradation of Formaldehyde

2021 ◽  
Vol 13 (3) ◽  
pp. 371-380
Author(s):  
Yongjun Wu ◽  
Nina Xie ◽  
Lu Yu
Keyword(s):  
Photoelectron Spectroscopy ◽  
Removal Rate ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Formaldehyde Concentration ◽  
Order Kinetic ◽  
Solution Ph ◽  
Visible Absorption ◽  
X Ray ◽  
Co Doped

A novel Ag–Si–TiO2 composite was prepared via sol–gel method for removing residual formaldehyde in shiitake mushroom. The structure of Ag–Si–TiO2 composite was characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses. Ultraviolet-visible absorption spectroscopy (UV-Vis) and N2 adsorption-desorption tests showed that Ag and Si co-doped decreased the band gap, the Brunauer-Emmett-Teller (BET) specific surface area of the samples increased and the recombination probability of electron-hole pairs (e--h+) reduced. Effect on removal rate of formaldehyde with different Ag-Si co-doped content, formaldehyde concentration and solution pH were investigated, and the results showed that 6.0 wt%Ag-3.0 wt%Si-TiO2 samples had an optimum catalytic performance, and the degradation efficiency reached 96.6% after 40 W 365 nm UV lamp irradiation for 360 min. The kinetics of formaldehyde degradation by Ag–Si–TiO2 composite photocatalyst could be described by Langmuir-Hinshelwood first-order kinetic model.

Iron and nitrogen co-doped porous carbon derived from soybean dregs with enhanced catalytic performance for oxygen reduction

2019 ◽  
Vol 839 ◽  
pp. 141-148 ◽  
Author(s):  
Minhui Shi ◽  
Junhong Ma ◽  
Zhizi Yao ◽  
Zhiwei Li ◽  
Hongyu Mi ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Porous Carbon ◽  
Catalytic Performance ◽  
Co Doped

Enhanced catalytic performance for metathesis reactions over ordered tungsten and aluminum co-doped mesoporous KIT-6 catalysts

2015 ◽  
Vol 39 (10) ◽  
pp. 7971-7978 ◽  
Author(s):  
Huan Liu ◽  
Kai Tao ◽  
Peipei Zhang ◽  
Wei Xu ◽  
Shenghu Zhou
Keyword(s):  
Catalytic Performance ◽  
High Dispersion ◽  
Metathesis Reactions ◽  
Co Doped

W-Al-KIT-6 (Si/Al = 10) with high dispersion of active W species and moderate acidity shows highest activity and selectivity to propene.

Selective dissolution and formula derivation of clay vermiculite from some Tuscan soils

Clay Minerals ◽  
1974 ◽  
Vol 10 (4) ◽  
pp. 279-287 ◽  
Author(s):  
G. G. Ristori ◽  
S. Cecconi ◽  
V. Vidrich ◽  
G. Pacifici
Keyword(s):  
Structural Characteristics ◽  
Structural Formula ◽  
Selective Dissolution ◽  
Parent Material ◽  
The Other ◽  
Dissolution Method ◽  
Structural Formulae ◽  
Formula Derivation ◽  
Low Charge ◽  
Basic Rocks

AbstractThe chemical composition and structural characteristics of clays from samples of eight Tuscan soils were investigated. Using simple selective dissolution method (successive boiling in 1 N HCl and 0·5 N NaOH) it was possible to distinguish two types of low charge dioctahedral vermiculite; one easily HCl soluble the other practically insoluble.Structural formulae for the soluble type were calculated from the chemical analysis of the dissolved material; for the insoluble type it was possible to calculate only an 'average' structural formula which included the micaceous material.Since the HCl soluble vermiculites show a high content of Fe and Mg, they can be considered either as alteration products of glauconites or biotites, or as a result of a synthesis, at least in soils derived from basic rocks which do not contain mica.The aluminous insoluble type, present also in parent material, may be the result of an incomplete 'illitization' in a marine environment.

Preparation of F, Cl and Nitrogen Doped TiO2 and their Photocatalytic Properties Research

2013 ◽  
Vol 423-426 ◽  
pp. 560-564
Author(s):  
Chen Tao Hou ◽  
Fei Lv
Keyword(s):  
Ammonium Chloride ◽  
Degradation Rate ◽  
Sol Gel ◽  
Good Condition ◽  
Catalytic Performance ◽  
Visible Condition ◽  
Roasting Temperature ◽  
Doping Ratio ◽  
Co Doped ◽  
Better Than

In the paper, sol-gel method has been used to make F-N, Cl-N co-doped TiO2 photocatalyst by the artificial zeolite as a carrier. The optimum doping and the best roasting temperature was found. The results showed that N, F co-doped photocatalyst can calcine at 400 °C, and when used in the best doping ratio as n (n-butyl titanate): n (ammonium chloride): n(N)= 1:0.01:0.012, its degradation rate can reach 92.4% in 3.5 hours. The N, Cl co-doped can calcine at 500 °C, and when used in the best doping ratio as n (n-butyl titanate): n (ammonium chloride):n(N) = 1:0.01:0.012 ,and the degradation rate of up to 88% in 3.5 hours. Scanning electron microscopy SEM and UV-visible spectrophotometry methods were used to analysis them,The results show that the experiment photocatalyst prepared in good condition. In the visible condition of the catalytic performance. The effection of F-N catalytic is better than Cl-N, and the degradation of methylene blue in 3.5 hours can reach 92.4%.

Enhanced Catalytic Performance of Manganese and Cobalt Co-doped CeO2Catalysts for Diesel Soot Oxidation

2016 ◽  
Vol 1 (21) ◽  
pp. 6681-6691 ◽  
Author(s):  
Bolla Govinda Rao ◽  
Deshetti Jampaiah ◽  
P. Venkataswamy ◽  
Benjaram M. Reddy
Keyword(s):  
Soot Oxidation ◽  
Catalytic Performance ◽  
Diesel Soot ◽  
Diesel Soot Oxidation ◽  
Co Doped

An FexNi4−xPy/N, P co-doped carbon nanotube composite as a bifunctional electrocatalyst for oxygen and hydrogen electrode reactions

2021 ◽  
Author(s):  
Tao Wei ◽  
Xiaoli Jiang ◽  
Qing Qin ◽  
Xien Liu
Keyword(s):  
Electrical Conductivity ◽  
Active Sites ◽  
Catalytic Performance ◽  
High Electrical Conductivity ◽  
Hydrogen Electrode ◽  
Bifunctional Electrocatalyst ◽  
Anchoring Effect ◽  
Electrode Reactions ◽  
Carbon Nanotube Composite ◽  
Co Doped

The FexNi4−xPy/N, P-CNT complex exhibits excellent bifunctional catalytic performance towards HER and OER due to the synergy of high electrical conductivity, multicomponent active sites, and anchoring effect of carbon nanotubes.

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