Regulating superoxide radicals and light absorption ability for enhancing photocatalytic performance of MoS2@Z by CeO2 rich in adsorbed oxygen

2021 ◽  
pp. 129059
Author(s):  
Junfei Liu ◽  
Yingbo Dong ◽  
Liping Zhang ◽  
Wei Liu ◽  
Conghui Zhang ◽  
...  
Keyword(s):  
Light Absorption ◽  
Photocatalytic Performance ◽  
Superoxide Radicals ◽  
Adsorbed Oxygen

scholarly journals Development of Visible-Light-Driven Rh–TiO2–CeO2 Hybrid Photocatalysts for Hydrogen Production

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 848
Author(s):  
Jong-Wook Hong
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Light Absorption ◽  
Photocatalytic Performance ◽  
Environmental Issues ◽  
Absorption Efficiency ◽  
Low Light ◽  
Practical Applications ◽  
Visible Light Driven ◽  
Poor Stability

Visible-light-driven hydrogen production through photocatalysis has attracted enormous interest owing to its great potential to address energy and environmental issues. However, photocatalysis possesses several limitations to overcome for practical applications, such as low light absorption efficiency, rapid charge recombination, and poor stability of photocatalysts. Here, the preparation of efficient noble metal–semiconductor hybrid photocatalysts for photocatalytic hydrogen production is presented. The prepared ternary Rh–TiO2–CeO2 hybrid photocatalysts exhibited excellent photocatalytic performance toward the hydrogen production reaction compared with their counterparts, ascribed to the synergistic combination of Rh, TiO2, and CeO2.

Fabrication of a TiO2 trapped meso/macroporous g-C3N4 heterojunction photocatalyst and understanding its enhanced photocatalytic activity based on optical simulation analysis

2018 ◽  
Vol 5 (2) ◽  
pp. 481-489 ◽  
Author(s):  
Wanbao Wu ◽  
Xu Li ◽  
Zhaohui Ruan ◽  
Yudong Li ◽  
Xianzhu Xu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Light Absorption ◽  
Photocatalytic Performance ◽  
Simulation Analysis ◽  
Optical Simulation

The enhanced photocatalytic performance of a TiO2 nanoparticle trapped meso/macroporous g-C3N4 heterojunction photocatalyst is strongly related to its enhanced light absorption as revealed by optical simulation.

Enhanced visible light and photocatalytic performance of TiO2 nanotubes by hydrogenation at lower temperature

RSC Advances ◽  
2016 ◽  
Vol 6 (8) ◽  
pp. 6643-6650 ◽  
Author(s):  
Lijuan Han ◽  
Zheng Ma ◽  
Zhihe Luo ◽  
Gang Liu ◽  
Jiantai Ma ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Tio2 Nanotubes ◽  
Photocatalytic Performance ◽  
Lower Temperature

The precursor with nanotubes structure can be hydrogenated easily in lower temperature comparing with nanobelts. The light absorption and photocatalytic activity of hydrogenated TiO2 nanotubes were enhanced drastically.

CeO2 Nanocrystal Decorated TiO2 Nanobelt with Enhanced Photocatalytic Performance

2021 ◽  
Vol 21 (4) ◽  
pp. 2647-2652
Author(s):  
Yanchen Ji ◽  
Guoxin Song ◽  
Ruiqi Yang ◽  
Longhua Ding ◽  
Aizhu Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Water Treatment ◽  
Light Absorption ◽  
High Performance ◽  
Photocatalytic Performance ◽  
Synthesis Method ◽  
Charge Carriers ◽  
Controllable Synthesis ◽  
Visible Light Absorption ◽  
Potential Applications

In this work, CeO2 nanocrystal-decorated TiO2 nanobelt for forming a CeO2@TiO2 heterostructure. CeO2 plays a dual role in improving photocatalytic activity, not only by promoting the separation and transfer of photogenerated charge carriers, but also by increasing visible light absorption of the photocatalyst as a photosensitizer. The as-prepared CeO2@TiO2 heterostructure demonstrates the performance of organic degradation and H2 production (about 17 μmol/h/g, which is about 2.5 times higher than that of pure TiO2 nanobelts). Our work provides a facile and controllable synthesis method for high performance photocatalyst, which will have potential applications in synthesis clean/solar fuel, and photocatalytic water treatment.

scholarly journals Tuning the Morphological Structure and Photocatalytic Activity of Nitrogen-Doped (BiO)2CO3by the Hydrothermal Temperature

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Chongjun Wang ◽  
Zaiwang Zhao ◽  
Bin Luo ◽  
Min Fu ◽  
Fan Dong
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Photocatalytic Performance ◽  
Morphological Structure ◽  
Hydrothermal Temperature ◽  
Nitrogen Doped ◽  
Light Region ◽  
Efficient Performance ◽  
One Step

Various nitrogen-doped hierarchical (BiO)2CO3nanosheets architectures were synthesized by a facile one-step template-free hydrothermal method through controlling the hydrothermal temperature (HT). The as-synthesized samples were characterized by XRD, SEM, FT-IR, XPS, and UV-vis DRS. The photocatalytic activity of the samples was evaluated towards degradation of NO at ppb level in air under visible light (VIL). It was found that HT acted as a crucial factor in determining the morphology of the samples. The rosa chinensis-like, red camellia-like, and lamina-like of nitrogen-doped (BiO)2CO3(N-BOC) micro-/nanostructures can be selectively fabricated under hydrothermal temperatures of 150, 180, and 210°C. The thickness of the nanosheets was in direct proportion to the increasing HT. Nitrogen-doping can extend the light absorption spectra of (BiO)3CO3to visible light region and enhance the VIL photocatalytic activity. Especially, the red camellia-like N-BOC-180 exhibited the highest photocatalytic performance, superior to the well-known VIL-driven photocatalyst C-doped TiO2and N-doped TiO2. The high photocatalytic performance of N-BOC was attributed to the synergetic effects of enhanced visible light absorption, multiple light-reflections between the nanosheets, and accelerated transfer of reactants and product. This research could provide new insights to the development of excellent photocatalyst with efficient performance for pollution control.

Effect of Rh valence state and doping concentration on the structure and photocatalytic H2 evolution in (Nb,Rh) codoped TiO2 nanorods

Nanoscale ◽  
2020 ◽  
Vol 12 (43) ◽  
pp. 22082-22090
Author(s):  
Jiquan Huang ◽  
Ting Lv ◽  
Qiufeng Huang ◽  
Zhonghua Deng ◽  
Jian Chen ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Light Absorption ◽  
Valence State ◽  
Doping Concentration ◽  
Photocatalytic Performance ◽  
Tio2 Nanorods ◽  
H2 Evolution ◽  
Visible Light Absorption ◽  
Photocatalytic H2 Evolution

(Nb,Rh) codoped TiO2 nanorods exhibit strong visible light absorption and efficient photocatalytic performance for hydrogen production.

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.

Tuning mixed-phase Nb-doped titania films for high-performance photocatalysts with enhanced whole-spectrum light absorption

2019 ◽  
Vol 9 (21) ◽  
pp. 6027-6036
Author(s):  
Yuxin Min ◽  
Xiaoyang Yang ◽  
Dawei Wang ◽  
Kai Yang ◽  
Shisheng Zheng ◽  
...  
Keyword(s):  
Light Absorption ◽  
High Performance ◽  
Photocatalytic Performance ◽  
Anatase Phase ◽  
Mixed Phase ◽  
Titania Films ◽  
Doped Titania

Heterojunction of rutile and anatase phase enhanced photocatalytic performance of mixed-phase Nb doped titania films to degrade pollutants under visible (vis) light.

Enhanced visible light absorption and photocatalytic activity of [KNbO3]1−x[BaNi0.5Nb0.5O3−δ]x synthesized by sol–gel based Pechini method

RSC Advances ◽  
2016 ◽  
Vol 6 (85) ◽  
pp. 82409-82416 ◽  
Author(s):  
Ping Wu ◽  
Guoming Wang ◽  
Ruizhi Chen ◽  
Yixin Guo ◽  
Xueming Ma ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Low Temperature ◽  
Visible Light ◽  
Light Absorption ◽  
Photocatalytic Performance ◽  
Pechini Method ◽  
Sol Gel ◽  
Visible Light Absorption ◽  
Gel Method ◽  
Visible Light Photocatalytic

[KNbO3]1−x[BaNi0.5Nb0.5O3−δ]x were synthesized by Pechini sol–gel method at low temperature. Visible light photocatalytic performance of this material was evaluated.

scholarly journals TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 761
Author(s):  
Thanh-Hiep Thi Le ◽  
Thanh-Trang Bui ◽  
Hao Van Bui ◽  
Van-Duong Dao ◽  
Loan Le Thi Ngoc
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Ag Nanoparticles ◽  
Photocatalytic Performance ◽  
Honeycomb Structure ◽  
Synergic Effect ◽  
Polystyrene Spheres ◽  
Visible Light Absorption ◽  
Photogenerated Electrons ◽  
Efficient Charge

This work reports on the synthesis, characterization, and photocatalytic performance of the TiO2 inverse opal nanostructure (IP-TiO2) and the IP-TiO2 modified by Ag nanoparticles (Ag@IP-TiO2). The IP-TiO2 is fabricated using polystyrene spheres as the template and TiCl4 as the precursor, and the Ag@IP-TiO2 is realized by photoreduction method. The morphological, structural, and optical properties of the materials are investigated by scanning electron microscopy, X-ray diffraction, ultraviolet–visible (UV-VIS) absorption spectroscopy, and photoluminescence spectroscopy. Their photocatalytic performances are studied by the degradation of rifampicin antibiotic under the visible-light irradiation generated by an LED lamp. The results demonstrate that the IP-TiO2 is composed of mesopores arranged in the honeycomb structure and strongly absorbs visible light in the wavelength range of 400–500 nm. This facilitates the visible-light catalytic activity of IP-TiO2, which is further enhanced by the surface modification by Ag nanoparticles. Our studies on the UV-VIS absorption and photoluminescent properties of the materials reveal that the presence of Ag nanoparticles not only enhances the visible-light absorption of IP-TiO2, but also reduces the recombination of photogenerated electrons and holes. These two factors create a synergic effect that causes the enhanced photocatalytic performance of Ag@IP-TiO2.

Sign in / Sign up

Export Citation Format

Share Document