Visible-light-driven surface reconstruction of mesoporous TiO2: toward visible-light absorption and enhanced photocatalytic activities

2011 ◽  
Vol 47 (30) ◽  
pp. 8584 ◽  
Author(s):  
Renhong Li ◽  
Hisayoshi Kobayashi ◽  
Junfang Guo ◽  
Jie Fan
Keyword(s):  
Visible Light ◽  
Surface Reconstruction ◽  
Light Absorption ◽  
Mesoporous Tio2 ◽  
Visible Light Absorption ◽  
Photocatalytic Activities ◽  
Visible Light Driven

Zr doped mesoporous LaTaON2 for efficient photocatalytic water splitting

2019 ◽  
Vol 7 (10) ◽  
pp. 5702-5711 ◽  
Author(s):  
Yawei Wang ◽  
Shu Jin ◽  
Guoxiang Pan ◽  
Zuxin Li ◽  
Long Chen ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Light Absorption ◽  
Visible Light Absorption ◽  
Photocatalytic Water Splitting ◽  
Photocatalytic Activities

Zr doping maintains the visible light absorption of LaTaON2 and contributes to enhanced photocatalytic activities for water splitting.

scholarly journals Synergistic effect of Ni–Ag–rutile TiO2 ternary nanocomposite for efficient visible-light-driven photocatalytic activity

RSC Advances ◽  
2020 ◽  
Vol 10 (60) ◽  
pp. 36930-36940 ◽  
Author(s):  
Petri M. Leukkunen ◽  
Ekta Rani ◽  
Assa Aravindh Sasikala Devi ◽  
Harishchandra Singh ◽  
Graham King ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Synergistic Effect ◽  
Visible Light ◽  
Light Absorption ◽  
Charge Separation ◽  
Effective Charge ◽  
Energy Dispersive ◽  
Intimate Contact ◽  
Visible Light Absorption ◽  
Visible Light Driven

Robust photocatalytic activity of Ni–Ag–RTiO2 is attributed to the improved visible light absorption and effective charge separation due to intimate contact between Ni and RTiO2via Ag, as evidenced by Ti3+ in Ti 2p XPS and energy dispersive mapping.

scholarly journals Visible-Light Driven TiO2 Photocatalyst Coated with Graphene Quantum Dots of Tunable Nitrogen Doping

Molecules ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 344 ◽  
Author(s):  
Xiong Sun ◽  
Hui-Jun Li ◽  
Nanquan Ou ◽  
Bowen Lyu ◽  
Bojie Gui ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Photocatalytic Performance ◽  
Light Emission ◽  
Graphene Quantum Dots ◽  
Visible Light Absorption ◽  
Visible Light Driven ◽  
Nitrogen Doped Graphene

Nitrogen doped graphene quantum dots (NGQDs) were successfully prepared via a hydrothermal method using citric acid and urea as the carbon and nitrogen precursors, respectively. Due to different post-treatment processes, the obtained NGQDs with different surface modifications exhibited blue light emission, while their visible-light absorption was obviously different. To further understand the roles of nitrogen dopants and N-containing surface groups of NGQDs in the photocatalytic performance, their corresponding composites with TiO2 were utilized to degrade RhB solutions under visible-light irradiation. A series of characterization and photocatalytic performance tests were carried out, which demonstrated that NGQDs play a significant role in enhancing visible-light driven photocatalytic activity and the carrier separation process. The enhanced photocatalytic activity of the NGQDs/TiO2 composites can possibly be attributed to an enhanced visible light absorption ability, and an improved separation and transfer rate of photogenerated carriers.

Effect of Hydrogen Peroxide on the Photocatalytic Decomposition of 4-Nitrophenol over TiO2/Cr-Ti- MCM-41 Catalysts in Visible Light

2005 ◽  
Vol 486-487 ◽  
pp. 13-16
Author(s):  
Gun Dae Lee ◽  
Y.J. Do ◽  
Seong Soo Park ◽  
Seong Soo Hong
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Photocatalytic Decomposition ◽  
Electron Hole ◽  
Visible Light Absorption ◽  
Photocatalytic Activities ◽  
Hole Recombination ◽  
Mcm 41 ◽  
Uv Range

Cr, Ti-substituted TiO2-loaded MCM-41 (TiO2/Cr-Ti-MCM-41) catalysts were prepared, and their photocatalytic activities for decomposition of 4-nitrophenol (4-NP) in visible light were studied. The effect of H2O2 on the photocatalytic decomposition of 4-NP was investigated. Tisubstituted MCM-41 exhibited an absorption in UV range, and the incorporation of both Ti and Cr in the MCM-41 framework created visible light absorption. The visible light absorption capability of TiO2/Cr-Ti-MCM-41 increased with increasing TiO2 loading. The photocatalytic activity of Cr- Ti-MCM-41 for degradation of 4-NP in visible light increased with increasing TiO2 loading up to 33 wt%. The addition of H2O2 enhanced the photocatalytic activity of 33 wt% TiO2/Cr-Ti-MCM-41 for decomposition of 4-NP in visible light. H2O2 was found to promote the adsorption of 4-NP on the Cr-Ti-MCM-41 surface, leading to increased reaction rate. In addition, H2O2 may act as an electron acceptor during photocatalytic reaction, thereby lowering the electron-hole recombination and increasing the efficiency of hole utilization.

scholarly journals New insight into effects of 4d transition metals doping on the photocatalytic activities of anatase TiO2(101) surface

2020 ◽  
Author(s):  
Yuehong Ren ◽  
Qingzhen Han ◽  
Qiaozhi Su ◽  
Jie Yang ◽  
Yuehong Zhao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Interband Transition ◽  
Energy Bands ◽  
Tio2 Photocatalysts ◽  
Visible Light Absorption ◽  
Photocatalytic Activities ◽  
Metal Phase Transition ◽  
Insight Into

Aiming at improving the visible-light photocatalytic activities of TiO2(101) surface (TiOS) we make an in-dept study on the TiOS doped with 4d transition metal (TM) atoms. It is shown that the 4d TM dopings can not only produce new impurity energy bands in the bandgap but also result in the semiconductor-metal phase transition. Consequently, the visible-light absorption is strongly strengthened due to the dopings of Y, Zr, Nb, Mo, and Ag, while it is only weakly improved for Tc, Ru, Rh, Pd, and Cd dopings. The improvement in visible-light absorption can be attributed to the intraband or interband transition of electrons. Moreover, the photocatalytic activities are explored, and we find Y and Ag dopings can effectively enhance the photocatalytic activity of TiOS. Thus the mechanism of improving photocatalytic activity of TiOS has been clearly addressed, which is beneficial to further experimental and theoretical researches on TiO2 photocatalysts.

An inverse opal TiO2/g-C3N4 composite with a heterojunction for enhanced visible light-driven photocatalytic activity

2019 ◽  
Vol 48 (10) ◽  
pp. 3486-3495 ◽  
Author(s):  
Juying Lei ◽  
Bin Chen ◽  
Weijia Lv ◽  
Liang Zhou ◽  
Lingzhi Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Separation Efficiency ◽  
Photogenerated Electron ◽  
Absorption Efficiency ◽  
Inverse Opal ◽  
Electron Hole ◽  
Visible Light Absorption ◽  
Visible Light Driven

An inverse opal TiO2/g-C3N4 composite with excellent photogenerated electron–hole separation efficiency and enhanced visible light absorption efficiency was constructed.

Enhanced light harvesting and charge separation over wormhole mesoporous TiO2−X nanocrystallites towards efficient hydrogen generation

2019 ◽  
Vol 3 (5) ◽  
pp. 1191-1200 ◽  
Author(s):  
Sanjay Singh Negi
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Charge Separation ◽  
Hydrogen Generation ◽  
Light Harvesting ◽  
Mesoporous Tio2 ◽  
Solar Light ◽  
Visible Light Absorption

Improved visible light absorption by meso-TiO2−X materials compared to TiO2 for enhanced solar light harvesting.

Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst

2016 ◽  
Vol 52 (94) ◽  
pp. 13702-13705 ◽  
Author(s):  
Masanori Yamamoto ◽  
Yusuke Nishizawa ◽  
Pavel Chábera ◽  
Fusheng Li ◽  
Torbjörn Pascher ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Light Absorption ◽  
Water Oxidation ◽  
Artificial Photosynthesis ◽  
Oxidation Catalyst ◽  
Interfacial Electron Transfer ◽  
Visible Light Absorption ◽  
Visible Light Driven

A newly designed contracted porphyrin achieved efficient visible light absorption and interfacial electron transfer for water oxidation in artificial photosynthesis.

Nitrogen deficient carbon nitride for efficient visible light driven tetracycline degradation: a combination of experimental and DFT studies

2020 ◽  
Vol 10 (20) ◽  
pp. 6800-6808
Author(s):  
Mier Wang ◽  
Changzheng Fan ◽  
Shuaijun Yang ◽  
Milan Liu ◽  
Jun Luo ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Recombination Rate ◽  
Carbon Nitride ◽  
Photocatalytic Performance ◽  
Graphitic Carbon Nitride ◽  
Dft Studies ◽  
Visible Light Absorption ◽  
Tetracycline Degradation ◽  
Visible Light Driven

The narrow visible-light absorption range and a high recombination rate of photo-excited electrons and holes are the main reasons for the confined photocatalytic performance of graphitic carbon nitride (g-C3N4).

Efficient difunctional photocatalyst prepared in situ from Prussian blue analogues for catalytic water oxidation and visible-light absorption

2018 ◽  
Vol 8 (24) ◽  
pp. 6375-6383 ◽  
Author(s):  
Jia Guo ◽  
Hui Li ◽  
Di Wang ◽  
Liugen Zhang ◽  
Yuhua Ma ◽  
...  
Keyword(s):  
Visible Light ◽  
Prussian Blue ◽  
Light Absorption ◽  
Water Oxidation ◽  
Cuo Nanoparticles ◽  
Oxidation Catalysts ◽  
Visible Light Absorption ◽  
Prussian Blue Analogues ◽  
Visible Light Driven

Co(OH)2-modified CuO (Co(OH)2/CuO) nanoparticles serve as both visible-light-driven water oxidation catalysts and visible-light-absorption centers.

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