Highly selective photo-hydroxylation of phenol using ultrathin NiFe-layered double hydroxide nanosheets under visible-light up to 550 nm

2020 ◽  
Vol 22 (24) ◽  
pp. 8604-8613
Author(s):  
Jikang Wang ◽  
Yanqi Xu ◽  
Jiaxin Li ◽  
Xiaodong Ma ◽  
Si-Min Xu ◽  
...  
Keyword(s):  
Visible Light ◽  
Layered Double Hydroxide ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Hydroxylation Of Phenol ◽  
Hydroxylation Reaction ◽  
Double Hydroxide

Ultrathin NiFe-LDH nanosheets with abundant defects show a highly selective photo-driven Fenton hydroxylation reaction under visible-light irradiation even at a wavelength of 550 nm.

Synthesis, characterization and enhanced visible light photocatalytic activity of Bi2MoO6/Zn–Al layered double hydroxide hierarchical heterostructures

2014 ◽  
Vol 4 (4) ◽  
pp. 1028-1037 ◽  
Author(s):  
Haiping Li ◽  
Quanhua Deng ◽  
Jingyi Liu ◽  
Wanguo Hou ◽  
Na Du ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Layered Double Hydroxide ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Visible Light Photocatalytic Activity ◽  
Photodegradation Efficiency ◽  
Double Hydroxide ◽  
Visible Light Photocatalytic

A Bi2MoO6/Zn–Al LDH heterostructure exhibits significantly enhanced photodegradation efficiency for RhB relative to Bi2MoO6 under visible light irradiation.

Photocatalytic decomposition of Congo red under visible light irradiation using MgZnCr-TiO2 layered double hydroxide

Chemosphere ◽  
2017 ◽  
Vol 168 ◽  
pp. 80-90 ◽  
Author(s):  
Chi Ma ◽  
Fenghua Wang ◽  
Chang Zhang ◽  
Zhigang Yu ◽  
Jingjing Wei ◽  
...  
Keyword(s):  
Visible Light ◽  
Layered Double Hydroxide ◽  
Visible Light Irradiation ◽  
Congo Red ◽  
Light Irradiation ◽  
Photocatalytic Decomposition ◽  
Double Hydroxide

scholarly journals Retracted Article: Ni/Ti layered double hydroxide: synthesis, characterization and application as a photocatalyst for visible light degradation of aqueous methylene blue

2015 ◽  
Vol 44 (15) ◽  
pp. 6809-6824 ◽  
Author(s):  
Priyadarshi Roy Chowdhury ◽  
Krishna G. Bhattacharyya
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Layered Double Hydroxide ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Retracted Article ◽  
Visible Light Degradation ◽  
Double Hydroxide

Hydrothermally synthesized 2 : 1 Ni/Ti layered double hydroxide (LDH) exhibits ∼99.8 % photocatalytic degradation of aqueous methylene blue under visible light irradiation.

Cu Doped TiO2: Visible Light Assisted Photocatalytic Antimicrobial Activity and High Temperature Anatase Stability

2018 ◽  
Author(s):  
Snehamol Mathew ◽  
Priyanka Ganguly ◽  
Stephen Rhatigan ◽  
Vignesh Kumaravel ◽  
Ciara Byrne ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Density Functional ◽  
Anatase Phase ◽  
Sol Gel ◽  
Chemical Properties ◽  
Light Irradiation ◽  
Health Concern ◽  
Bacterial Inactivation ◽  
X Ray

Indoor surface contamination by microbes is a major public health concern. A damp environment is one potential sources for microbe proliferation. Smart photocatalytic coatings on building surfaces using semiconductors like titania (TiO<sub>2</sub>) can effectively curb this growing threat.<b> </b>Metal-doped titania in anatase phase has been proved as a promising candidate for energy and environmental applications. In this present work, the antimicrobial efficacy of copper (Cu) doped TiO<sub>2 </sub>(Cu-TiO<sub>2</sub>) was evaluated against <i>Escherichia coli</i> (Gram-negative) and <i>Staphylococcus aureus</i> (Gram-positive) under visible light irradiation. Doping of a minute fraction of Cu (0.5 mol %) in TiO<sub>2 </sub>was carried out <i>via</i> sol-gel technique. Cu-TiO<sub>2</sub> further calcined at various temperatures (in the range of 500 °C – 700 °C) to evaluate the thermal stability of TiO<sub>2</sub> anatase phase. The physico-chemical properties of the samples were characterised through X-ray diffraction (XRD), Raman spectroscopy, X-ray photo-electron spectroscopy (XPS) and UV-visible spectroscopy techniques. XRD results revealed that the anatase phase of TiO<sub>2</sub> was maintained well, up to 650 °C, by the Cu dopant. UV-DRS results suggested that the visible light absorption property of Cu-TiO<sub>2 </sub>was enhanced and the band gap is reduced to 2.8 eV. Density functional theory (DFT) studies emphasises the introduction of Cu<sup>+</sup> and Cu<sup>2+</sup> ions by replacing Ti<sup>4+</sup> ions in the TiO<sub>2</sub> lattice, creating oxygen vacancies. These further promoted the photocatalytic efficiency. A significantly high bacterial inactivation (99.9%) was attained in 30 mins of visible light irradiation by Cu-TiO<sub>2</sub>.

Photo-Fenton Degradation of RhB over Nano-fibre Iron Oxides Interacted Montmorillonite under Visible Light Irradiation

2013 ◽  
Vol 33 (10) ◽  
pp. 1736-1741
Author(s):  
Shilong ZHANG ◽  
Xiaoming HU ◽  
Xiaowei WANG ◽  
Shijing LIANG ◽  
Ling WU
Keyword(s):  
Visible Light ◽  
Iron Oxides ◽  
Visible Light Irradiation ◽  
Light Irradiation

Semiconductor Photocatalysts for Solar-to-Hydrogen Energy Conversion: Recent Advances of CdS

2020 ◽  
Vol 16 ◽  
Author(s):  
Yuxue Wei ◽  
Honglin Qin ◽  
Jinxin Deng ◽  
Xiaomeng Cheng ◽  
Mengdie Cai ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Noble Metals ◽  
Light Irradiation ◽  
Photocatalytic Hydrogen Evolution ◽  
Theoretical Design ◽  
Recent Developments

Introduction: Solar-driven photocatalytic hydrogen production from water splitting is one of the most promising solutions to satisfy the increasing demands of a rapidly developing society. CdS has emerged as a representative semiconductor photocatalyst due to its suitable band gap and band position. However, the poor stability and rapid charge recombination of CdS restrict its application for hydrogen production. The strategy of using a cocatalyst is typically recognized as an effective approach for improving the activity, stability, and selectivity of photocatalysts. In this review, recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation are summarized. In particular, the factors affecting the photocatalytic performance and new cocatalyst design, as well as the general classification of cocatalysts, are discussed, which includes a single cocatalyst containing noble-metal cocatalysts, non-noble metals, metal-complex cocatalysts, metal-free cocatalysts, and multi-cocatalysts. Finally, future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are described. Background: Photocatalytic hydrogen evolution from water splitting using photocatalyst semiconductors is one of the most promising solutions to satisfy the increasing demands of a rapidly developing society. CdS has emerged as a representative semiconductor photocatalyst due to its suitable band gap and band position. However, the poor stability and rapid charge recombination of CdS restrict its application for hydrogen production. The strategy of using a cocatalyst is typically recognized as an effective approach for improving the activity, stability, and selectivity of photocatalysts. Methods: This review summarizes the recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation. Results: Recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation are summarized. The factors affecting the photocatalytic performance and new cocatalyst design, as well as the general classification of cocatalysts, are discussed, which includes a single cocatalyst containing noble-metal cocatalysts, non-noble metals, metal-complex cocatalysts, metal-free cocatalysts, and multi-cocatalysts. Finally, future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are described. Conclusion: The state-of-the-art CdS for producing hydrogen from photocatalytic water splitting under visible light is discussed. The future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are also described.

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