Synergistic effects between polyvinylpyrrolidone and oxygen vacancies on improving the oxidase-mimetic activity of flower-like CeO2 nanozymes

Nanoscale ◽  
2020 ◽  
Vol 12 (37) ◽  
pp. 19104-19111 ◽  
Author(s):  
Mingyun Zhu ◽  
Yifeng Wen ◽  
Shugui Song ◽  
Anqi Zheng ◽  
Jingcang Li ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Synergistic Effects ◽  
Reaction Products

The synergy between polyvinylpyrrolidone and enriched oxygen vacancies can promote the adsorption of reactants (TMB and O2) and desorption of reaction products, which results in the enhanced oxidase-mimetic activity of CeO2 nanoflowers.

Morphology-dependent oxygen vacancies and synergistic effects of Ni/CeO2 catalysts for N2O decomposition

2018 ◽  
Vol 8 (1) ◽  
pp. 276-288 ◽  
Author(s):  
Pei Zhao ◽  
Feng Qin ◽  
Zhen Huang ◽  
Chao Sun ◽  
Wei Shen ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Synergistic Effects ◽  
N2o Decomposition ◽  
Vital Effects

Strong morphology-dependent oxygen vacancies and synergistic effects of Ni/CeO2 catalysts and their vital effects on N2O decomposition.

Synergistic effects of oxygen vacancies and the chelation of tetracycline with metallic ions for enhanced degradation of tetracycline over photocatalysts La2-xKxNiMnO6

CrystEngComm ◽  
2021 ◽  
Author(s):  
Xiaoyan Yu ◽  
Ke Lu ◽  
Le Chen
Keyword(s):  
Oxygen Vacancies ◽  
Synergistic Effects ◽  
Metallic Ions ◽  
Photogenerated Electrons ◽  
Enhanced Degradation

Oxygen vacancies (OVs) can trap photogenerated electrons (e－) to promot the separation of photogenerated e－ and holes ( h＋), and can serve as the reactive sites in a variety of...

Enhanced catalytic phenol hydroxylation by CuZnFeAl layered double hydroxides: synergistic effects of Cu+ and oxygen vacancies

2021 ◽  
Vol 45 (1) ◽  
pp. 179-188
Author(s):  
Yong Jiang ◽  
Wenlong Xu ◽  
Jinhua Liang ◽  
Jiecan Shen ◽  
Xiaomin Fu ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Oxygen Vacancies ◽  
Synergistic Effects ◽  
Phenol Oxidation ◽  
Precipitation Method ◽  
Phenol Hydroxylation ◽  
Co Precipitation ◽  
Double Hydroxides

In this work, a series of CuZnFeAl-LDH catalysts for phenol oxidation to dihydroxybenzene have been prepared through a co-precipitation method.

New insight into binary TiO2@C nanocomposites: the crucial effect of an interfacial microstructure

2017 ◽  
Vol 19 (14) ◽  
pp. 9519-9527 ◽  
Author(s):  
Jiandong Zhuang ◽  
Qinfen Tian ◽  
Qian Liu ◽  
Ping Liu ◽  
Xiurong Cui ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Synergistic Effects ◽  
Interfacial Microstructure ◽  
Crucial Effect ◽  
Visible Photocatalysis ◽  
Insight Into

The properties of interfacial bonds and oxygen vacancies as well as their synergistic effects on visible photocatalysis of TiO2@C nanocomposites.

scholarly journals Improved adsorption and degradation performance by S-doping of (001)-TiO2

2019 ◽  
Vol 10 ◽  
pp. 2116-2127 ◽  
Author(s):  
Xiao-Yu Sun ◽  
Xiao Sun ◽  
Xian Zhang ◽  
Ni-Xian Qian ◽  
Min Wang ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Photocatalytic Performance ◽  
Lattice Distortion ◽  
Synergistic Effects ◽  
Chemical Vapor ◽  
Surface Chemical ◽  
Ionic Radii ◽  
Thermal Chemical Vapor Deposition ◽  
Molar Ratios ◽  
Chemical States

In this work, sulfur-doped (S-doped) TiO2 with the (001) face exposed was synthesized by thermal chemical vapor deposition at 180 or 250 °C using S/Ti molar ratios R S/Ti of 0, 0.5, 1, 2, 3, 4 and 5. The S-doped samples synthesized at 250 °C exhibit a significantly improved photocatalytic performance. More precisely, S-doping has the following effects on the material: (1) S can adopt different chemical states in the samples. Specifically, it exists in the form of S2− replacing O2− at a ratio of R S/Ti = 1 and also in the form of S6+ replacing Ti4+ at R S/Ti ≥ 2. As a result, S-doping causes a lattice distortion, because the ionic radii of S2− and S6+ differ from that of the O2− and Ti4+ ions. (2) S-doping increases the adsorption coefficient A e for methylene blue (MB) from 0.9% to 68.5% due to the synergistic effects of the oxygen vacancies, increased number of surface chemical adsorption centers as a result of SO4 2− adsorption on the TiO2 surface and the larger pore size. (3) S-doping increases the MB degradation rate from 6.9 × 10−2 min−1 to 18.2 × 10−2 min−1 due to an increase in the amount of •OH and •O2− radicals.

Synergistic Effects of Zinc Oxide on Intumescent Flame-Retarded Polypropylene Composites

2010 ◽  
Vol 178 ◽  
pp. 279-284 ◽  
Author(s):  
Shan Hu ◽  
Hui Zheng ◽  
Shang Yue Shen ◽  
Hong Chang Han ◽  
Hui Jing ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Oxygen Index ◽  
Synergistic Effects ◽  
Synthesis Process ◽  
Reaction Products ◽  
Limiting Oxygen Index ◽  
Polypropylene Composites ◽  
Melamine Phosphate ◽  
Flame Retarded ◽  
Synergistic Agent

The melamine phosphate (MP) was synthesized from melamine and phosphate acid. Zinc oxide (ZnO) was used as a synergistic agent by adding into the MP during the synthesis process. The reaction products were characterized by Fourier transform infrared spectroscopy (FTIR). The properties of polypropylene (PP) composites containing intumescent flame retardant (IFR) additives of melamine phosphate and pentaerythritol (PER) were investigated by the limiting oxygen index (LOI), UL-94 vertical burning test, thermogravimetric analysis (TG) and scanning electron microscopy (SEM). The results indicated that the LOI value of the composites could be enhanced obviously with suitable content of ZnO. When the ZnO content was 6 wt% in MP, the LOI value reached 34.1%, which showed 10% higher than that of the composites without ZnO.

Graphene oxide mediated co-generation of C-doping and oxygen defects in Bi2WO6 nanosheets: a combined DRIFTS and DFT investigation

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20562-20570 ◽  
Author(s):  
Minglu Sun ◽  
Xing'an Dong ◽  
Ben Lei ◽  
Jieyuan Li ◽  
Peng Chen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Method ◽  
Oxygen Vacancies ◽  
Photocatalytic Performance ◽  
Synergistic Effects ◽  
No Removal ◽  
Oxygen Defects ◽  
C Doping

The co-generation of C-doping and oxygen vacancies (OVs) in Bi2WO6 nanosheets was achieved by a graphene oxide-mediated hydrothermal method. The photocatalytic performance was highly promoted in NO removal with the synergistic effects of C-doping and OVs.

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