Facile synthesis of a Ag(i)-doped coordination polymer with enhanced catalytic performance in the photodegradation of azo dyes in water

2015 ◽  
Vol 3 (11) ◽  
pp. 5908-5916 ◽  
Author(s):  
Fan Wang ◽  
Fu-Ling Li ◽  
Miao-Miao Xu ◽  
Hong Yu ◽  
Jian-Guo Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Coordination Polymer ◽  
Azo Dyes ◽  
Azo Dye ◽  
Catalytic Performance ◽  
Facile Synthesis

Immersing {[Pb(Tab)2(bpe)]2(PF6)4}n into AgNO3 solution produced a Ag(i)-doped coordination polymer {[Pb(Tab)2(bpe)]2(PF6)4·1.64AgNO3}n, which enhanced the catalytic activity towards azo dye photodegradation.

Facile synthesis of three-dimensional ordered macroporous Sr1−xKxTiO3 perovskites with enhanced catalytic activity for soot combustion

2018 ◽  
Vol 8 (21) ◽  
pp. 5462-5472 ◽  
Author(s):  
Peng Zhao ◽  
Nengjie Feng ◽  
Fan Fang ◽  
Geng Liu ◽  
Li Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Soot Combustion ◽  
Facile Synthesis ◽  
Ordered Macroporous

The appropriate incorporation of potassium into 3DOM SrTiO3 perovskites effectively improved the catalytic performance for soot combustion.

Large-scale and facile synthesis of a porous high-entropy alloy CrMnFeCoNi as an efficient catalyst

2020 ◽  
Vol 8 (35) ◽  
pp. 18318-18326 ◽  
Author(s):  
Hailong Peng ◽  
Yangcenzi Xie ◽  
Zicheng Xie ◽  
Yunfeng Wu ◽  
Wenkun Zhu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Surface Area ◽  
Large Scale ◽  
High Surface ◽  
High Surface Area ◽  
Catalytic Performance ◽  
High Entropy Alloy ◽  
Facile Synthesis ◽  
Efficient Catalyst ◽  
High Entropy

Porous high entropy alloy CrMnFeCoNi exhibited remarkable catalytic activity and stability toward p-nitrophenol hydrogenation. The enhanced catalytic performance not only resulted from the high surface area, but also from exposed high-index facets with terraces.

scholarly journals Catalytic Activity of Porous Phosphate Heterostructures-Fe towards Reactive Black 5 Degradation

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Marco S. Lucas ◽  
Manuel Algarra ◽  
José Jiménez-Jiménez ◽  
Enrique Rodríguez-Castellón ◽  
José A. Peres
Keyword(s):  
Catalytic Activity ◽  
Economic System ◽  
Azo Dyes ◽  
Azo Dye ◽  
Reactive Black 5 ◽  
Heterogeneous Process ◽  
Fenton’S Reaction ◽  
Mild Conditions ◽  
Simulated Wastewater ◽  
Porous Phosphate

Fenton’s reaction is often used to decompose stable substances in wastewater. In this study, experiments based on the effect of porous phosphate heterostructures as catalyst sorbent of Fe2+synthesised by different procedures were planned. The examined PPH-Fe/H2O2as oxidant in a heterogeneous process under mild conditions at pH 5 was found to be very efficient for discoloration of a simulated wastewater containing 50 mg L−1of a commercial azo dye (Reactive Black 5) reaching 95% of decolourization. Under the described conditions total visual decolourization was achieved after 360 min. This study can provide a simple, effective, and economic system ideal for the treatment of toxic and nonbiodegradable azo dyes.

Magnetic, recyclable PtyCo1−y/Ti3C2X2 (X = O, F) catalyst: a facile synthesis and enhanced catalytic activity for hydrogen generation from the hydrolysis of ammonia borane

2017 ◽  
Vol 41 (7) ◽  
pp. 2793-2799 ◽  
Author(s):  
Guangyin Fan ◽  
Xiaojing Li ◽  
Yuling Ma ◽  
Yun Zhang ◽  
Jiangtao Wu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Room Temperature ◽  
Hydrogen Generation ◽  
Ammonia Borane ◽  
Catalytic Performance ◽  
Facile Synthesis ◽  
Hydrolysis Of ◽  
Excellent Catalytic Performance ◽  
Magnetic Recyclable

Magnetic recyclable PtyCo1−y/Ti3C2X2 (X = O, F) catalyst exhibits excellent catalytic performance for the hydrolysis of AB at room temperature.

Capsule-Like Fe3O4 Nanoparticles and Triangle Fe3O4 Nanoplates: Facile Synthesis, Magnetic Properties and Catalytic Performance

NANO ◽  
2015 ◽  
Vol 10 (05) ◽  
pp. 1550063 ◽  
Author(s):  
T. Zeng ◽  
Y. Bai ◽  
H. Li ◽  
W. F. Yao
Keyword(s):  
Catalytic Activity ◽  
Catalytic Performance ◽  
High Specific Surface Area ◽  
Significant Loss ◽  
Degree Of Crystallinity ◽  
High Catalytic Activity ◽  
Facile Synthesis ◽  
Catalytic Stability ◽  
Hydrothermal Approach ◽  
High Degree

In this work, Fe 3 O 4 with nanosized triangle plates and capsule-like nanoparticles were prepared by solvothermal approach ( Fe 3 O 4- S ) and hydrothermal approach ( Fe 3 O 4- H ), respectively and their catalytic performance as a heterogeneous Fenton-like catalyst are investigated. Excellent ferromagnetic properties are obtained in both Fe 3 O 4- S nanoplates and Fe 3 O 4- H nanoparticles. The Fe 3 O 4- S nanoplates exhibited better catalytic performance than Fe 3 O 4- H nanoparticles in the degradation of Rhodamine B ( RhB ) with hydrogen peroxide. The relatively high catalytic activity of Fe 3 O 4- S can be ascribed to its high specific surface area and high degree of crystallinity. Fe 3 O 4- S nanoplates also exhibit good catalytic stability and reusability and do not generate significant loss of catalytic activity after four cycles of degradation.

Manganese oxides with hierarchical structures derived from coordination polymers and their enhanced catalytic activity at low temperature for selective catalytic reduction of NOx

2019 ◽  
Vol 48 (43) ◽  
pp. 16395-16401 ◽  
Author(s):  
Byeonggab Ji ◽  
Junhyung Lee ◽  
Seung-Yeop Kwak
Keyword(s):  
Catalytic Activity ◽  
Coordination Polymer ◽  
Manganese Oxides ◽  
Preparation Method ◽  
Catalytic Reduction ◽  
Hierarchical Structures ◽  
Cost Effective ◽  
Catalytic Performance ◽  
Environmentally Benign ◽  
Reduction Of Nox

Hierarchical manganese oxides for enhancing catalytic performance have been successfully synthesized via simple thermal annealing manganese coordination polymer, which is a facile, cost-effective, and environmentally benign preparation method.

The design and catalytic performance of molybdenum active sites on an MCM-41 framework for the aerobic oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran

2019 ◽  
Vol 9 (3) ◽  
pp. 811-821 ◽  
Author(s):  
Zhao-Meng Wang ◽  
Li-Juan Liu ◽  
Bo Xiang ◽  
Yue Wang ◽  
Ya-Jing Lyu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Aerobic Oxidation ◽  
Catalytic Performance ◽  
Mcm 41

The catalytic activity decreases as –(SiO)3Mo(OH)(O) > –(SiO)2Mo(O)2 > –(O)4–MoO.

Use of a sequencing batch biofilter for degradation of azo dyes (acids and bases)

2000 ◽  
Vol 42 (5-6) ◽  
pp. 329-336 ◽  
Author(s):  
M. Quezada ◽  
I. Linares ◽  
G. Buitrón
Keyword(s):  
Azo Dyes ◽  
Azo Dye ◽  
Degradation Rate ◽  
Removal Rate ◽  
Textile Effluent ◽  
Colour Removal ◽  
Substrate Degradation ◽  
Acids And Bases ◽  
Removal Efficiencies ◽  
Basic Red 46

The degradation of azo dyes in an aerobic biofilter operated in an SBR system was studied. The azo dyes studied were Acid Red 151 and a textile effluent containing basic dyes (Basic Blue 41, Basic Red 46 and 16 and Basic Yellow 28 and 19). In the case of Acid Red 151 a maximal substrate degradation rate of 288 mg AR 151/lliquid·d was obtained and degradation efficiencies were between 60 and 99%. Mineralization studies showed that 73% (as carbon) of the initial azo dye was transformed to CO2 by the consortia. The textile effluent was efficiently biodegraded by the reactor. A maximal removal rate of 2.3 kg COD/lliquid·d was obtained with removal efficiencies (as COD) varying from 76 to 97%. In all the cycles the system presented 80% of colour removal.

scholarly journals Influence of the Reduction Temperature and the Nature of the Support on the Performance of Zirconia and Alumina-Supported Pt Catalysts for n-Dodecane Hydroisomerization

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 88
Author(s):  
Diana García-Pérez ◽  
Maria Consuelo Alvarez-Galvan ◽  
Jose M. Campos-Martin ◽  
Jose L. G. Fierro
Keyword(s):  
Catalytic Activity ◽  
Surface Area ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Major Influence ◽  
Pt Catalysts ◽  
Reduction Temperature ◽  
Metal Dispersion ◽  
Tungsten Oxides ◽  
Supported Pt Catalysts

Catalysts based on zirconia- and alumina-supported tungsten oxides (15 wt % W) with a small loading of platinum (0.3 wt % Pt) were selected to study the influence of the reduction temperature and the nature of the support on the hydroisomerization of n-dodecane. The reduction temperature has a major influence on metal dispersion, which impacts the catalytic activity. In addition, alumina and zirconia supports show different catalytic properties (mainly acid site strength and surface area), which play an important role in the conversion. The NH3-TPD profiles indicate that the acidity in alumina-based catalysts is clearly higher than that in their zirconia counterparts; this acidity can be attributed to a stronger interaction of the WOx species with alumina. The PtW/Al catalyst was found to exhibit the best catalytic performance for the hydroisomerization of n-dodecane based on its higher acidity, which was ascribed to its larger surface area relative to that of its zirconia counterparts. The selectivity for different hydrocarbons (C7–10, C11 and i-C12) was very similar for all the catalysts studied, with branched C12 hydrocarbons being the main products obtained (~80%). The temperature of 350 °C was clearly the best reduction temperature for all the catalysts studied in a trickled-bed-mode reactor.

scholarly journals A diffusion anisotropy descriptor links morphology effects of H-ZSM-5 zeolites to their catalytic cracking performance

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Xiaoliang Liu ◽  
Jing Shi ◽  
Guang Yang ◽  
Jian Zhou ◽  
Chuanming Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Cracking ◽  
Catalytic Performance ◽  
Zeolite Catalysts ◽  
Time Resolved ◽  
Cracking Performance ◽  
Morphology Effect ◽  
Ft Ir ◽  
The Difference ◽  
Dynamics Simulations

AbstractZeolite morphology is crucial in determining their catalytic activity, selectivity and stability, but quantitative descriptors of such a morphology effect are challenging to define. Here we introduce a descriptor that accounts for the morphology effect in the catalytic performances of H-ZSM-5 zeolite for C4 olefin catalytic cracking. A series of H-ZSM-5 zeolites with similar sheet-like morphology but different c-axis lengths were synthesized. We found that the catalytic activity and stability is improved in samples with longer c-axis. Combining time-resolved in-situ FT-IR spectroscopy with molecular dynamics simulations, we show that the difference in catalytic performance can be attributed to the anisotropy of the intracrystalline diffusive propensity of the olefins in different channels. Our descriptor offers mechanistic insight for the design of highly effective zeolite catalysts for olefin cracking.

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