The BiOBr/Bi/Bi2WO6 photocatalyst with SPR effect and Z-scheme heterojunction synergistically degraded RhB under visible light

2021 ◽  
Vol 122 ◽  
pp. 111641
Author(s):  
Xingliang Chen ◽  
Binxia Zhao ◽  
Jixian Ma ◽  
Linxue Liu ◽  
Haidong Luo ◽  
...  
Keyword(s):  
Visible Light ◽  
Spr Effect

Preparation of Bi/Bi2MoO6 Plasmonic Photocatalyst with High Photocatalytic Activity Under Visible Light Irradiation

NANO ◽  
2018 ◽  
Vol 13 (11) ◽  
pp. 1850127 ◽  
Author(s):  
Chentao Zou ◽  
Zhiyuan Yang ◽  
Mengjun Liang ◽  
Yunpeng He ◽  
Yun Yang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rate Constant ◽  
Active Species ◽  
High Photocatalytic Activity ◽  
Composite Photocatalysts ◽  
Degradation Rate Constant ◽  
Degradation Activity ◽  
Spr Effect

Bi metal deposited on Bi2MoO6 composite photocatalysts have been successfully synthesized via a simple reduction method at room temperature with using NaBH4 as the reducing agent. The photocatalytic activity of the composite was evaluated by degradation of rhodamine B (RhB) and bisphenol A (BPA) solution under visible light. The rate constant of Bi/Bi2MoO6 composite to RhB is 10.8 times that of Bi2MoO6, and the degradation rate constant of BPA is 6.9 times of that of Bi2MoO6. Nitrogen absorption–desorption isotherm proved that the increase of specific surface area is one of the reasons for the improvement of photocatalytic degradation activity of Bi/Bi2MoO6 composites. The higher charge transfer efficiency of Bi/Bi2MoO6 is found through the characterization of the photocurrent and impedance, which are attributed to the surface plasmon resonance (SPR) effect produced by the introduction of the metal Bi monomer in the composite. Free radical capture experiments proved that cavitation is the main active species. Based on the above conclusions, a possible mechanism of photocatalytic degradation is proposed.

Enhanced Photocatalytic Activity of GO-Ag@CoCN Composite for RhB Degradation under Visible Light Irradiation

2021 ◽  
Vol 1027 ◽  
pp. 76-80
Author(s):  
Meng Fan Ma ◽  
Ling Fang Qiu ◽  
Ping Li ◽  
Shu Wang Duo
Keyword(s):  
Photocatalytic Activity ◽  
Optical Property ◽  
Visible Light ◽  
Ag Nanoparticles ◽  
Separation Efficiency ◽  
Light Illumination ◽  
Electron Hole ◽  
Heterojunction Structure ◽  
Visible Light Illumination ◽  
Spr Effect

Ag nanoparticles and GO co-modified Co-g-C3N4 composites were prepared successfully. The visible-light adsorption of the optimized GO-Ag@Co-g-C3N4 was improved significantly by the SPR effect of Ag nanoparticles, and the separation efficiency of photo-induced electron-hole pairs of g-C3N4 was accelerated to a large extent by the heterojunction structure of the composite and the superior conductivity of GO. The optimized GO-Ag@CoCN showed promising degradation efficiency for RhB (10 mg/L) under visible light illumination (λ>420 nm) for 160 min, which was 130% and 16.5% higher than the performance using bare g-C3N4 and optimized Ag@Co-g-C3N4, respectively. This work provided a novel way for improving the optical property and photocatalytic activity of g-C3N4.

A facile synthesis of Ag/AgCl hybrid nanostructures with tunable morphologies and compositions as advanced visible light plasmonic photocatalysts

2016 ◽  
Vol 45 (22) ◽  
pp. 9158-9165 ◽  
Author(s):  
Aasim Shahzad ◽  
Woo-Sik Kim ◽  
Taekyung Yu
Keyword(s):  
Photocatalytic Activity ◽  
Surface Plasmon Resonance ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Hybrid Nanostructures ◽  
Facile Synthesis ◽  
Strong Surface ◽  
Spr Effect ◽  
Degradation Of Methyl Orange

Ag/AgCl plasmonic photocatalysts are synthesized by a simple and rapid method in an aqueous-phase. The Ag/AgCl hybrid nanostructures exhibited enhanced photocatalytic activity and stability toward the degradation of methyl orange under visible light irradiation because of their strong surface plasmon resonance (SPR) effect.

Facile Synthesis of Ag/AgCl Grafted AgBi(MoO4)2 with Enhanced Photocatalytic Performance Under Visible Light

NANO ◽  
2018 ◽  
Vol 13 (08) ◽  
pp. 1850089 ◽  
Author(s):  
Xu Yan ◽  
Ziyang Wu ◽  
Yong Zhao ◽  
Biao Liu ◽  
Yubin Tang
Keyword(s):  
Visible Light ◽  
Practical Application ◽  
Ag Nps ◽  
Experimental Conditions ◽  
Degradation Ratio ◽  
Activity Promotion ◽  
High Efficient ◽  
Spr Effect ◽  
Insight Into

Silver nanoparticles (NPs) and related semiconductors are a family of very important and widely applied photocatalysts. However, the preparation of high stability and activity of this photocatalyst is still a challenge. In this work, we report a stable Ag/AgCl/AgBi(MoO[Formula: see text] heterojunction photocatalyst fabricated via a simple in situ anion-exchange reaction followed by the photoreduction treatment. In the treatment of tetracycline (TC) wastewater under visible light, the AC-0.4 sample (prepared with 0.4[Formula: see text]mmol KCl) exhibits the significantly improved activity (degradation ratio, DR of 71.3%) compared with the pristine AgBi(MoO[Formula: see text] (30% DR) and Ag/AgCl sample (synthesized by the photoreduction of AgCl) (37% DR) under identical experimental conditions. This activity promotion is from the fast interfacial electron transfer between the heterojunction phases of AgCl/AgBi(MoO[Formula: see text] and the SPR effect of Ag NPs. After five successive recycles, the AC-0.4 sample still maintains good stability and activity for TC degradation, which shows a great potential to be used in practical application. Through the ESR and controlled scavenged experiments, we found the [Formula: see text]OH and [Formula: see text]O[Formula: see text] are the major reactive intermediate species in the TC photodegradation reaction. Our work provides a new insight into the synthesis of stable and high efficient Ag-based heterojunction photocatalysts for the application of wastewater treatment.

scholarly journals ZnO/Ag/Ag2WO4 photo-electrodes with plasmonic behavior for enhanced photoelectrochemical water oxidation

RSC Advances ◽  
2019 ◽  
Vol 9 (15) ◽  
pp. 8271-8279 ◽  
Author(s):  
Rania E. Adam ◽  
Mahsa Pirhashemi ◽  
Sami Elhag ◽  
Xianjie Liu ◽  
Aziz Habibi-Yangjeh ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Charge Carrier ◽  
Visible Light ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Water Oxidation ◽  
Co Catalyst ◽  
Carrier Separation ◽  
Spr Effect ◽  
Photoelectrochemical Water Oxidation

Ag-based compounds are excellent co-catalyst that can enhance harvesting visible light and increase photo-generated charge carrier separation owing to its surface plasmon resonance (SPR) effect in photoelectrochemical (PEC) applications.

scholarly journals Coupling Plasmonic and Cocatalyst Nanoparticles on N–TiO2 for Visible-Light-Driven Catalytic Organic Synthesis

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 391 ◽  
Author(s):  
Yannan Wang ◽  
Yu Chen ◽  
Qidong Hou ◽  
Meiting Ju ◽  
Weizun Li
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Energy Conversion Efficiency ◽  
Catalytic Performance ◽  
Light Irradiation ◽  
Apparent Quantum Yield ◽  
Visible Light Driven ◽  
Photocatalytic Reactions ◽  
Spr Effect ◽  
Two Parameters

The use of the surface plasmon resonance (SPR) effect of plasmonic metal nanocomposites to promote photocarrier generation is a strongly emerging field for improving the catalytic performance under visible-light irradiation. In this study, a novel plasmonic photocatalyst, AuPt/N–TiO2, was prepared via a photo-deposition–calcination technique. The Au nanoparticles (NPs) were used herein to harvest visible-light energy via the SPR effect, and Pt NPs were employed as a cocatalyst for trapping the energetic electrons from the semiconductor, leading to a high solar-energy conversion efficiency. The Au2Pt2/N–TiO2 catalyst, herein with the irradiation wavelength in the range 460–800 nm, exhibited a reaction rate ~24 times greater than that of TiO2, and the apparent quantum yield at 500 nm reached 5.86%, indicative of the successful functionalization of N–TiO2 by the integration of Au plasmonic NPs and the Pt cocatalyst. Also, we investigated the effects of two parameters, light source intensity and wavelength, in photocatalytic reactions. It is indicated that the as-prepared AuPt/N–TiO2 photocatalyst can cause selective oxidation of benzyl alcohol under visible-light irradiation with a markedly enhanced selectivity and yield.

Enhancement of Ti3C2 MXene on Au@Ag/TiO2 for the visible-light-driven photoreduction of nitroaromatics

CrystEngComm ◽  
2022 ◽  
Author(s):  
Huiqin An ◽  
Lifang Cao ◽  
Ran Cheng ◽  
Xiaoqi Zhang ◽  
Saihui Zhang ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Visible Light ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Hot Electrons ◽  
Generation Rate ◽  
Visible Light Driven ◽  
Spr Effect

The hot electrons produced by surface plasmon resonance (SPR) effect of plasmonic metal offer an efficient and sustainable strategy for traditional catalysis. However, the low generation rate and easy recombination...

Highly efficient visible-light-induced photoactivity of Z-scheme Ag2CO3/Ag/WO3 photocatalysts for organic pollutant degradation

2017 ◽  
Vol 4 (11) ◽  
pp. 2175-2185 ◽  
Author(s):  
Xingzhong Yuan ◽  
Longbo Jiang ◽  
Xiaohong Chen ◽  
Lijian Leng ◽  
Hou Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Organic Pollutant ◽  
Pollutant Degradation ◽  
Highly Efficient ◽  
Organic Pollutant Degradation ◽  
Spr Effect

Z-scheme photocatalytic systems combined with a metallic Ag SPR effect are applied to improve the photocatalytic activity.

Synergistic effects of plasmon induced Ag@Ag3VO4/ZnCr LDH ternary heterostructures towards visible light responsive O2 evolution and phenol oxidation reactions

2018 ◽  
Vol 5 (4) ◽  
pp. 879-896 ◽  
Author(s):  
Dipti Prava Sahoo ◽  
Sulagna Patnaik ◽  
Dharitri Rath ◽  
K. M. Parida
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Ag Nanoparticles ◽  
Synergistic Effects ◽  
High Photocatalytic Activity ◽  
Phenol Oxidation ◽  
O2 Evolution ◽  
Oxidation Reactions ◽  
Oxidation Of Phenol ◽  
Spr Effect

The SPR effect of monodisperse Ag nanoparticles in Ag@Ag3VO4/ZnCr LDH heterostructures exhibits high photocatalytic activity towards evolution of O2 and oxidation of phenol.

scholarly journals Ag/AgCl Loaded Bi2WO6Composite: A Plasmonic Z-Scheme Visible Light-Responsive Photocatalyst

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Xiangchao Meng ◽  
Zisheng Zhang
Keyword(s):  
Crystal Structure ◽  
Photocatalytic Activity ◽  
Surface Plasmon Resonance ◽  
Visible Light ◽  
Photocatalytic Oxidation ◽  
Low Ph ◽  
Facile Hydrothermal Method ◽  
Activity Test ◽  
Potential Applications ◽  
Spr Effect

Hierarchical flower-like Bi2WO6was successfully synthesized by facile hydrothermal method at low pH. And Ag/AgCl was loaded by photoreduction on its surface. As-prepared photocatalysts were characterized by various techniques. Bi2WO6was successfully synthesized at a size of 2-3 μm. Depositing Ag/AgCl did not destroy the crystal structure, and both Ag+and metallic Ag0were found. The band gap of the composite was 2.57 eV, which indicates that visible light could be the activating irradiation. In the photocatalytic activity test, the composite with 10 wt% Ag/AgCl boasted the highest removal efficiency (almost 100%) in 45 min. The significant enhancement can be attributed to the surface plasmon resonance (SPR) effect and the establishment of heterostructures between Ag/AgCl and Bi2WO6. A possible mechanism of photocatalytic oxidation in the presence of Ag/AgCl-Bi2WO6was proposed. This work sheds light on the potential applications of plasmonic metals in photocatalysis to enhance their activities.

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