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 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.

Shedding light on hydroxyquinoline-based ruthenium sensitizers with a long-lived charge carrier to boost photocatalytic H2 evolution

RSC Advances ◽  
2016 ◽  
Vol 6 (47) ◽  
pp. 41165-41172 ◽  
Author(s):  
Indranil Mondal ◽  
Amritanjali Tiwari ◽  
Rajib Ghosh ◽  
Ujjwal Pal
Keyword(s):  
Hydrogen Production ◽  
Charge Carrier ◽  
Visible Light ◽  
H2 Evolution ◽  
Photocatalytic H2 Evolution

Three new hydroxyquinoline-coordinated ruthenium(ii) sensitizers bearing a polypyridyl derivative anchor (R1, R2 and R3) were synthesized that could tether to visible light sensitization over a Pt–TiO2 system 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.

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.

Design of multicomponent photocatalysts for hydrogen production under visible light using water-soluble titanate nanodisks

Nanoscale ◽  
2014 ◽  
Vol 6 (9) ◽  
pp. 4819-4829 ◽  
Author(s):  
Cao-Thang Dinh ◽  
Minh-Hao Pham ◽  
Yongbeom Seo ◽  
Freddy Kleitz ◽  
Trong-On Do
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Catalytic Reaction ◽  
Light Absorption ◽  
Charge Separation ◽  
Water Soluble ◽  
Visible Light Absorption ◽  
Highly Efficient ◽  
Main Factors

Water-soluble multicomponent photocatalysts highly efficient for H2 generation under visible light are designed in such a way to simultaneously enhance the three main factors of photocatalysis, i.e. visible light absorption, charge separation, and surface catalytic reaction.

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.

CdS-Based Photocatalysts for Solar Water Splitting

2021 ◽  
Vol 02 ◽  
Author(s):  
Yimeng Cao ◽  
Chuhong Zhu ◽  
Taotao Wang ◽  
Daochuan Jiang ◽  
Sheng Ye
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Visible Light ◽  
Water Splitting ◽  
Light Absorption ◽  
Narrow Band ◽  
Heteroatom Doping ◽  
Visible Light Absorption ◽  
Solar Water Splitting ◽  
Band Position

: Photocatalytic water splitting for hydrogen production is a promising pathway for solar energy convention into chemicals. Among various semiconductor-based photocatalysts, cadmium sulfide (CdS) attracted extensive attentions due to the narrow band gap nature (2.4 eV) for efficient visible light absorption, suitable band position for water splitting, and outstanding photocatalytic activity. In this review, we summarize the recent advances for the synthesis of CdS, and modification strategies including heteroatom doping, loading cocatalysts, and hetero/homo-junction fabrication are also presented. Moreover, a brief perspective and challenges on CdS-based photocatalyst are also discussed.

Coupling of MAPbI3 microcrystals with conductive polyaniline for efficient visible-light-driven H2 evolution

2021 ◽  
Author(s):  
Wenbo Li ◽  
Fang Wang ◽  
Zhengguo Zhang ◽  
Xiaohua Ma ◽  
Shixiong Min
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
H2 Evolution ◽  
Lead Iodide ◽  
Hybrid Perovskite ◽  
Visible Light Driven ◽  
Conductive Polyaniline ◽  
Methylammonium Lead Iodide ◽  
Photocatalytic H2 Evolution

Although methylammonium lead iodide (MAPbI3) hybrid perovskite has shown great potential in photocatalytic H2 evolution, its photocatalytic performance is significantly suppressed due to the insufficient charge separation. Herein, a strongly...

scholarly journals A metal-free 3C-SiC/g-C3N4 composite with enhanced visible light photocatalytic activity

RSC Advances ◽  
2017 ◽  
Vol 7 (63) ◽  
pp. 40028-40033 ◽  
Author(s):  
Hao Xu ◽  
Zhixing Gan ◽  
Weiping Zhou ◽  
Zuoming Ding ◽  
Xiaowei Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Carbon Nitride ◽  
Photocatalytic Performance ◽  
Photogenerated Electron ◽  
Electron Hole ◽  
Visible Light Absorption ◽  
Metal Free ◽  
Visible Light Photocatalytic

Insufficient visible light absorption and fast recombination of the photogenerated electron–hole pairs have seriously hampered the photocatalytic performance of graphitic carbon nitride (g-C3N4) up to now.

Sign in / Sign up

Export Citation Format

Share Document