Photoresponse of surface oxygen defects on TiO2(110)

2005 ◽  
Vol 244 (1-4) ◽  
pp. 550-553 ◽  
Author(s):  
Masaharu Komiyama ◽  
Yan-Jun Li
Keyword(s):  
Surface Oxygen ◽  
Oxygen Defects

A high-energy-state biomimetic enzyme of oxygen-deficient MnTiO3 nanodiscs for sensitive electrochemical sensing of the superoxide anion

2019 ◽  
Vol 55 (54) ◽  
pp. 7836-7839 ◽  
Author(s):  
Shenfei Zhao ◽  
Zhuanzhuan Shi ◽  
Chun Xian Guo ◽  
Chang Ming Li
Keyword(s):  
Superoxide Anion ◽  
Energy State ◽  
High Energy ◽  
Electrochemical Sensing ◽  
Surface Oxygen ◽  
Oxygen Defects ◽  
High Energy State ◽  
Inducing Surface

A high-energy-state biomimetic enzyme for the superoxide anion is presented by inducing surface oxygen defects in MnTiO3 nanodiscs.

Correlation Between Tunable Oxygen Defects in TiO2 Nanoflower and Its Photocatalytic Performance for the Degradation of Organic Waste

NANO ◽  
2020 ◽  
Vol 15 (02) ◽  
pp. 2050018
Author(s):  
Cai Chen ◽  
Han Zhang ◽  
Arshid M. Ali ◽  
Hui Zhang
Keyword(s):  
Catalytic Activity ◽  
Degradation Rate ◽  
Surface Defects ◽  
Hydrogen Reduction ◽  
Defect Concentration ◽  
Oxygen Defect ◽  
Surface Oxygen ◽  
Fixed Amount ◽  
Photo Catalytic Activity ◽  
Oxygen Defects

Oxygen defects of nanoflower TiO2 photo-catalyst was fabricated at the presence of hydrogen at different temperatures (100–600∘C) and the concentrations of oxygen defects were firstly quantitatively analyzed by hydrogen programmed temperature reduction techniques (H2-TPR). Total oxygen defect concentration and surface oxygen defect concentration were consistent with XPS and EPR results, respectively. Even at the hydrogen thermal temperature of 600∘C, the shape of TiO2 was still kept as nanoflower structure as characterized by SEM. However, the rutile and anatase coexist in the composition of crystal phase when hydrogen reduction temperature of the TiO2 catalyst reached 400∘C to 600∘C as proved by Raman and XRD results. TiO2 sample with oxygen defects shows excellent photo-catalytic activity for degradation of Direct Blue 78(DB) regardless of ultraviolet light (the maximum degradation rate achieved within 100[Formula: see text]min was 93.27%) or visible light (the maximum degradation rate achieved within 100[Formula: see text]min was 88.25%). The photo-catalytic activity seems to be highly correlated with the surface oxygen defects of TiO2 catalyst. With surface oxygen-defect concentrations increase, the degradation ability on DB was significantly enhanced, while bulk oxygen defects had negligible effect on the photo-catalytic activity. The enhanced photo-catalytic performance of TiO2 with a fixed amount of oxygen defects was attributed to the strong capturing capability of the photo-generated electrons. In addition, the surface defects could also improve the photo-catalytic reaction efficiency.

Mitigating evolution of lattice oxygen and stabilizing structure of lithium-rich oxides by fabricating surface oxygen defects

2019 ◽  
Vol 328 ◽  
pp. 134987 ◽  
Author(s):  
Jianjian Zhong ◽  
Zhe Yang ◽  
Yanying Liu ◽  
Jianling Li ◽  
Xindong Wang ◽  
...  
Keyword(s):  
Lattice Oxygen ◽  
Surface Oxygen ◽  
Oxygen Defects

Effects on structure, surface oxygen defects and humidity performance of Au modified ZnO via hydrothermal method

2019 ◽  
Vol 486 ◽  
pp. 482-489 ◽  
Author(s):  
Hongyan Zhang ◽  
Shuguo Yu ◽  
Chu Chen ◽  
Jun Zhang ◽  
Jing Liu ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Surface Oxygen ◽  
Oxygen Defects ◽  
Structure Surface

Improving the oxygen evolution activity of Co3O4 by introducing Ce species derived from Ce-substituted ZIF-67

2019 ◽  
Vol 3 (11) ◽  
pp. 3201-3207 ◽  
Author(s):  
Jieming Zhou ◽  
Haiyan Zheng ◽  
Qingjie Luan ◽  
Xiubing Huang ◽  
Yang Li ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Surface Oxygen ◽  
Oxygen Defects

Proper control of the introduced Ce amount and species in Ce–Co3O4 composites derived from Ce-substituted ZIF-67 precursors could precisely tune the Co3+/Co2+ ratio and induce surface oxygen defects, further boosting the OER performance.

Exploration of the Effective Location of Surface Oxygen Defects in Graphene-Based Electrocatalysts for All-Vanadium Redox-Flow Batteries

2014 ◽  
Vol 5 (5) ◽  
pp. 1401550 ◽  
Author(s):  
Minjoon Park ◽  
In-Yup Jeon ◽  
Jaechan Ryu ◽  
Jong-Beom Baek ◽  
Jaephil Cho
Keyword(s):  
Surface Oxygen ◽  
Redox Flow Batteries ◽  
Oxygen Defects ◽  
Flow Batteries ◽  
Vanadium Redox

Enhanced cycling stability of LiNi 0.8 Co 0.1 Mn 0.1 O 2 by reducing surface oxygen defects

2017 ◽  
Vol 234 ◽  
pp. 99-107 ◽  
Author(s):  
Kui Meng ◽  
Zhixing Wang ◽  
Huajun Guo ◽  
Xinhai Li
Keyword(s):  
Cycling Stability ◽  
Surface Oxygen ◽  
Oxygen Defects

Modulating Reaction Pathways on Perovskite Cobaltite Nanofibers through Excessive Surface Oxygen Defects for Efficient Water Oxidation

2021 ◽  
Vol 35 (17) ◽  
pp. 13967-13974
Author(s):  
Qiuyu Liu ◽  
Chenghao Jia ◽  
Mengzhen Zhou ◽  
Zuyun He ◽  
Zhiheng Gong ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Reaction Pathways ◽  
Surface Oxygen ◽  
Oxygen Defects

Engineering surface oxygen defects on tungsten oxide to boost photocatalytic oxygen evolution from water splitting

2019 ◽  
Vol 55 (44) ◽  
pp. 6265-6268 ◽  
Author(s):  
Yi-Hao Chew ◽  
Jie-Yinn Tang ◽  
Li-Jie Tan ◽  
Bryan Wei Jian Choi ◽  
Lling-Lling Tan ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Vacancies ◽  
Surface Oxygen ◽  
Oxygen Defects

This study showcases a facile approach for tuning the degree of surface oxygen vacancies in WO3 and its prominent role in enhancing the performance of WO3 in photocatalytic O2 evolution.

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