1
|
Xu Y, Yu S, Huang C, Xu Z. Enhanced photocatalytic removal of bromate in drinking water by Au/TiO 2 under ultraviolet light. RSC Adv 2024; 14:23011-23022. [PMID: 39040693 PMCID: PMC11261577 DOI: 10.1039/d4ra03453h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Accepted: 07/05/2024] [Indexed: 07/24/2024] Open
Abstract
The photo-reduction of bromate (BrO3 -) has attracted much attention due to the carcinogenesis and genotoxicity of BrO3 - in drinking water. In this study, a heterojunction photocatalyst was developed by depositing Au nanoparticles (NPs) onto P25 TiO2 NPs through a one-pot, solvent-thermal process. Due to the unique properties of Au, the Au NPs deposited on the TiO2 surface created a Schottky barrier between the metal and the semiconductor, leading to an effective separation of photo-generated charge carriers as the Au nanoparticles served as electron sinks. The Au/TiO2 photocatalyst demonstrated efficient reduction of BrO3 - under UV light illumination without the need for sacrificial agents. The effect of different Au loading of Au/TiO2 was systematically investigated for its influence on the generation of electrons and the reduction ability of BrO3 -. The results indicate that the 1% Au/TiO2 catalyst exhibited a higher concentration of localized electrons, rendering it more effective in BrO3 - removal. The photocatalytic efficiency for BrO3 - reduction decreased upon the addition of K2S2O8 as an electron quencher, suggesting that the primary factor in this photo-reduction process was the availability of electrons. These findings hold promise for the potential application of the Au/TiO2 catalyst in the removal of BrO3 - from drinking water through photo-reduction.
Collapse
Affiliation(s)
- Ying Xu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University Shanghai 200092 P. R. China
- Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 P. R. China
| | - Shuili Yu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University Shanghai 200092 P. R. China
- Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 P. R. China
| | - Cong Huang
- PowerChina Huadong Engineering Corporation Limited Hangzhou 311122 P. R. China
| | - Zheng Xu
- PowerChina Huadong Engineering Corporation Limited Hangzhou 311122 P. R. China
| |
Collapse
|
2
|
Naya SI, Morita Y, Sugime H, Soejima T, Fujishima M, Tada H. Efficient plasmonic water splitting by heteroepitaxial junction-induced faceting of gold nanoparticles on an anatase titanium(IV) oxide nanoplate array electrode. NANOSCALE 2024; 16:13435-13444. [PMID: 38919999 DOI: 10.1039/d4nr01013b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
Plasmonic photocatalysts represented by gold nanoparticle (NP)-loaded titanium(IV) oxide (Au/TiO2) can be promising solar-to-fuel converters by virtue of their response to visible-to-near infrared light. Hitherto, Au/rutile (R)-TiO2 has been recognized as exhibiting photocatalytic activity higher than that of Au/anatase (A)-TiO2. Herein, we demonstrate that the high potential of A-TiO2 as the Au NP support can be brought out through atomic level interface control. Faceting of Au NPs is induced by a heteroepitaxial junction on an A-TiO2(001) nanoplate array (Au/A-TiO2 NPLA). Photoexcitation towards the Au/A-TiO2 NPLA electrode generates current for the water oxidation reaction at λ < 900 nm with a maximum efficiency of 0.39% at λ = 600 nm, which is much larger than the values reported so far for the usual electrodes. The striking activity of the Au/A-TiO2 NPLA electrode was rationalized using a potential-dependent Fowler model. This study presented a novel approach for developing solar-driven electrodes for green and sustainable fuel production.
Collapse
Affiliation(s)
- Shin-Ichi Naya
- Environmental Research Laboratory, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.
| | - Yoko Morita
- Graduate School of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
| | - Hisashi Sugime
- Graduate School of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
| | - Tetsuro Soejima
- Graduate School of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
| | - Musashi Fujishima
- Graduate School of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
| | - Hiroaki Tada
- Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan.
| |
Collapse
|
3
|
Hou X, Chen J, Chen Z, Yu D, Zhu S, Liu T, Chen L. Flexible Aerogel Materials: A Review on Revolutionary Flexibility Strategies and the Multifunctional Applications. ACS NANO 2024; 18:11525-11559. [PMID: 38655632 DOI: 10.1021/acsnano.4c00347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
The design and preparation of flexible aerogel materials with high deformability and versatility have become an emerging research topic in the aerogel fields, as the brittle nature of traditional aerogels severely affects their safety and reliability in use. Herein, we review the preparation methods and properties of flexible aerogels and summarize the various controlling and design methods of aerogels to overcome the fragility caused by high porosity and nanoporous network structure. The mechanical flexibility of aerogels can be revolutionarily improved by monomer regulation, nanofiber assembly, structural design and controlling, and constructing of aerogel composites, which can greatly broaden the multifunctionality and practical application prospects. The design and construction criterion of aerogel flexibility is summarized: constructing a flexible and deformable microstructure in an aerogel matrix. Besides, the derived multifunctional applications in the fields of flexible thermal insulation (flexible thermal protection at extreme temperatures), flexible wearable electronics (flexible sensors, flexible electrodes, electromagnetic shielding, and wave absorption), and environmental protection (oil/water separation and air filtration) are summarized. Furthermore, the future development prospects and challenges of flexible aerogel materials are also summarized. This review will provide a comprehensive research basis and guidance for the structural design, fabrication methods, and potential applications of flexible aerogels.
Collapse
Affiliation(s)
- Xianbo Hou
- College of Aerospace Engineering, Chongqing University, Chongqing 400030, People's Republic of China
| | - Jia Chen
- College of Aerospace Engineering, Chongqing University, Chongqing 400030, People's Republic of China
| | - Zhilin Chen
- College of Aerospace Engineering, Chongqing University, Chongqing 400030, People's Republic of China
| | - Dongqin Yu
- College of Bioengineering, Chongqing University, Chongqing 400044, People's Republic of China
| | - Shaowei Zhu
- College of Aerospace Engineering, Chongqing University, Chongqing 400030, People's Republic of China
| | - Tao Liu
- College of Aerospace Engineering, Chongqing University, Chongqing 400030, People's Republic of China
| | - Liming Chen
- College of Aerospace Engineering, Chongqing University, Chongqing 400030, People's Republic of China
| |
Collapse
|
4
|
Tang H, Ang Chen Z, Wu M, Li S, Ye Z, Zhi M. Au-CeO 2 composite aerogels with tunable Au nanoparticle sizes as plasmonic photocatalysts for CO 2 reduction. J Colloid Interface Sci 2024; 653:316-326. [PMID: 37717432 DOI: 10.1016/j.jcis.2023.09.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 08/05/2023] [Accepted: 09/11/2023] [Indexed: 09/19/2023]
Abstract
Tuning the size of Au nanoparticles is always an interesting task when constructing Au/semiconductor heterojunctions for surface plasmon resonance-enhanced photocatalysis. In particular, the size of Au nanoparticles in the newly emerging "plasmonic aerogel" photocatalyst concept could approach the size of the semiconductor phase. This work provides an alternative route to realize the size tuning of Au nanoparticles in Au-CeO2 composite aerogels to some extent, within the framework of the well-established epoxide addition sol-gel method. The size tuning is achieved by exploiting the multi-functionalities of a mixed organic acid additive containing a thiol group in the gelation step. The obtained aerogel photocatalysts are composed of a porous backbone of interconnected CeO2 nanoparticles and Au nanoparticles, and the size of Au nanoparticles ranges from ∼30 nm to sub-10 nm, while the size of CeO2 remains at ∼15-10 nm. The surface plasmon resonance peak position and intensity contributed by the Au nanoparticles then vary accordingly. Photocatalytic CO2 reduction at the gas-solid interface is chosen as a model reaction to study the effect of Au nanoparticle size on the photocatalytic activity of composite aerogel photocatalysts. The addition of Au nanoparticles undoubtedly enhances the overall activity of the CeO2 aerogel photocatalyst, while the degree of enhancement (in terms of total charge consumption) and product selectivity (CH4 or CO) are different and correlated with the size of the Au nanoparticles. The best performance can be achieved in a composite in which the Au sizes are the smallest.
Collapse
Affiliation(s)
- Hao Tang
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China
| | - Zi Ang Chen
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China
| | - Muchen Wu
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China
| | - Shunbo Li
- Key Disciplines Laboratory of Novel Micro-Nano Devices and System Technology, College of Optoelectronics Engineering, Chongqing University, Chongqing 400044, PR China
| | - Ziran Ye
- Department of Applied Physics, College of Science, Zhejiang University of Technology, Hangzhou 310014, PR China.
| | - Mingjia Zhi
- Institute for Composites Science Innovation (InCSI), School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China.
| |
Collapse
|
5
|
Guo Y, Li H, Li B, Su S, Zhong X, Kong D, Chen Y, Song Y. Enhanced Photocatalytic Coupling of Benzylamine to N-Benzylidene Benzylamine over the Organic-Inorganic Composites F70-TiO 2 Based on Fullerenes Derivatives and TiO 2. Molecules 2023; 28:molecules28114301. [PMID: 37298775 DOI: 10.3390/molecules28114301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 05/15/2023] [Accepted: 05/18/2023] [Indexed: 06/12/2023] Open
Abstract
The organic-inorganic composites F70-TiO2, based on fullerene with carboxyl group derivatives and TiO2 semiconductor, have been designed and constructed to become an optical-functional photocatalyst via the facile sol-gel method. The composite photocatalyst obtained shows excellent photocatalytic activity for the high-efficiency conversion of benzylamine (BA) to N-benzylidene benzylamine (NBBA) with air pressure at a normal temperature under visible light irradiation. By optimizing the composition, the composites with the 1:15 mass ratio of F70 and TiO2, denoted as F70-TiO2(1:15), demonstrated the highest reaction efficiency for benzylamine (>98% conversion) to N-benzylidene benzylamine (>93% selectivity) in this study. However, pure TiO2 and fullerene derivatives (F70) exhibit decreased conversion (56.3% and 89.7%, respectively) and selectivity (83.8% and 86.0%, respectively). The UV-vis diffuse reflectance spectra (DRS) and Mott-Schottky experiment's results indicate that the introduction of fullerene derivatives into anatase TiO2 would greatly broaden the visible light response range and adjust the energy band positions of the composites, enhancing the sunlight utilization and promoting the photogenerated charge (e--h+) separation and transfer. Specifically, a series of results on the in situ EPR tests and the photo-electrophysical experiment indicate that the separated charges from the hybrid could effectively activate benzylamine and O2 to accelerate the formation of active intermediates, and then couple with free BA molecules to form the desired production of N-BBA. The effective combination, on a molecular scale, between fullerene and titanium dioxide has provided a profound understanding of the photocatalysis mechanism. This work elaborates and makes clear the relationship between the structure and the performance of functional photocatalysts.
Collapse
Affiliation(s)
- Yanmeng Guo
- Hainan Provincial Key Laboratory of Fine Chemicals, College of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| | - Hang Li
- Hainan Provincial Key Laboratory of Fine Chemicals, College of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| | - Bo Li
- Hainan Provincial Key Laboratory of Fine Chemicals, College of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| | - Shizhuo Su
- Hainan Provincial Key Laboratory of Fine Chemicals, College of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| | - Xin Zhong
- Hainan Provincial Key Laboratory of Fine Chemicals, College of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| | - Derui Kong
- Hainan Provincial Key Laboratory of Fine Chemicals, College of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| | - Yifan Chen
- Hainan Provincial Key Laboratory of Fine Chemicals, College of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| | - Yujie Song
- Hainan Provincial Key Laboratory of Fine Chemicals, College of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
| |
Collapse
|
6
|
Yoshiiri K, Karabiyik B, Wang K, Wei Z, Colbeau-Justin C, Kowalska E. The property-governed activity of silver-modified titania photocatalysts: The influence of titania matrix. J Chem Phys 2022; 156:244706. [DOI: 10.1063/5.0097762] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Commercial titania photocatalysts were modified with silver nanoparticles (NPs) by the photodeposition method in the presence/absence of methanol. The obtained photocatalysts were characterized by XRD, XPS, diffuse reflectance spectroscopy, STEM, and time-resolved microwave conductivity (TRMC) methods. The photocatalytic activity was tested under UV/vis irradiation for (i) methanol dehydrogenation (during silver deposition), (ii) oxygen evolution with in situ silver deposition, and (iii) oxidative decomposition of acetic acid, as well as under vis irradiation for 2-propanol oxidation. The action spectra of 2-propanol oxidation were also performed. It has been confirmed that modification of titania with silver causes significant improvement of photocatalytic activity under both UV and vis irradiation as silver works as an electron scavenger (TRMC data) and vis activator (possibly by an energy transfer mechanism). The obtained activities differ between titania samples significantly, suggesting that the type of crystalline phase, particle/crystallite sizes, and electron traps’ density are crucial for both the properties of formed silver deposits and resultant photocatalytic activity. It might be concluded that, under UV irradiation, (i) high crystallinity and large specific surface area are recommended for rutile- and anatase-rich samples, respectively, during hydrogen evolution, (ii) mixed crystalline phases cause a high rate of oxygen evolution from water, and (iii) anatase phase with fine silver NPs results in efficient decomposition of acetic acid, whereas under vis irradiation the aggregated silver NPs (broad localized surface plasmon resonance peak) on the rutile phase are promising for oxidation reactions.
Collapse
Affiliation(s)
- Kenta Yoshiiri
- Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan
- Institute for Catalysis (ICAT), Hokkaido University, Sapporo, Japan
| | - Baris Karabiyik
- Institute for Catalysis (ICAT), Hokkaido University, Sapporo, Japan
| | - Kunlei Wang
- Institute for Catalysis (ICAT), Hokkaido University, Sapporo, Japan
- Northwest Research Institute, Co. Ltd. of C.R.E.C., Lanzhou, China
| | - Zhishun Wei
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan, People's Republic of China
| | | | - Ewa Kowalska
- Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan
- Institute for Catalysis (ICAT), Hokkaido University, Sapporo, Japan
| |
Collapse
|
7
|
Matter F, Niederberger M. The Importance of the Macroscopic Geometry in Gas-Phase Photocatalysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105363. [PMID: 35243811 PMCID: PMC9069382 DOI: 10.1002/advs.202105363] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Indexed: 05/04/2023]
Abstract
Photocatalysis has the potential to make a major technological contribution to solving pressing environmental and energy problems. There are many strategies for improving photocatalysts, such as tuning the composition to optimize visible light absorption, charge separation, and surface chemistry, ensuring high crystallinity, and controlling particle size and shape to increase overall surface area and exploit the reactivity of individual crystal facets. These processes mainly affect the nanoscale and are therefore summarized as nanostructuring. In comparison, microstructuring is performed on a larger size scale and is mainly concerned with particle assembly and thin film preparation. Interestingly, most structuring efforts stop at this point, and there are very few examples of geometry optimization on a millimeter or even centimeter scale. However, the recent work on nanoparticle-based aerogel monoliths has shown that this size range also offers great potential for improving the photocatalytic performance of materials, especially when the macroscopic geometry of the monolith is matched to the design of the photoreactor. This review article is dedicated to this aspect and addresses some issues and open questions that arise when working with macroscopically large photocatalysts. Guidelines are provided that could help develop novel and efficient photocatalysts with a truly 3D architecture.
Collapse
Affiliation(s)
- Fabian Matter
- Laboratory for Multifunctional MaterialsDepartment of MaterialsETH ZurichVladimir‐Prelog‐Weg 5Zurich8093Switzerland
| | - Markus Niederberger
- Laboratory for Multifunctional MaterialsDepartment of MaterialsETH ZurichVladimir‐Prelog‐Weg 5Zurich8093Switzerland
| |
Collapse
|
8
|
Hussain I, Sahoo S, Sayed MS, Ahmad M, Sufyan Javed M, Lamiel C, Li Y, Shim JJ, Ma X, Zhang K. Hollow nano- and microstructures: Mechanism, composition, applications, and factors affecting morphology and performance. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214429] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
9
|
Ma J, Zhang M, Su W, Wu B, Yang Z, Wang X, Qiao B, Pei H, Tu J, Chen D, Wu Q. Photoelectrochemical Enzyme Biosensor Based on TiO 2 Nanorod/TiO 2 Quantum Dot/Polydopamine/Glucose Oxidase Composites with Strong Visible-Light Response. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:751-761. [PMID: 34981932 DOI: 10.1021/acs.langmuir.1c02741] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Although photoelectrochemical (PEC) enzyme biosensors based on visible-light detection would have a high practical value, their development has been limited by the weak visible-light response of available photoactive substrates. Here, to enhance the visible-light response of a photoelectric substrate, a TiO2 nanorods (NRs)/TiO2 quantum dots (QDs)/polydopamine (PDA)/glucose oxidase nanocomposite was prepared via hydrothermal synthesis, followed by photopolymerization. TiO2 QDs with strong light absorption and excellent photocatalytic activity were introduced between the TiO2 NRs and the PDA. An efficient electron transport interface that formed as a result of the combination of the TiO2 NRs, TiO2 QDs, and the PDA could not only transfer electrons quickly and orderly, but also substantially improve the response of the TiO2 NRs under visible light. Through a series glucose detection, a sensor based on the nanocomposite was found to exhibit superior sensing performance under visible light with a sensitivity of 4.63 μA mM-1 cm-2, a linear response over the concentration 0.1-4 mM, and a detection limit of 8.16 μM. This work proposes a biosensor that can detect under visible light, thereby expanding the application range of PEC enzyme biosensors.
Collapse
Affiliation(s)
- Jinxin Ma
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Miaomiao Zhang
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Wen Su
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Baiqiang Wu
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Zhuo Yang
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Xiaohong Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Bin Qiao
- Department of Clinical Laboratory of the Second Affiliated Hospital, School of Tropical Medicine and Laboratory Medicine, Key Laboratory of Emergency and Trauma of Ministry of Education, Research Unit of Island Emergency Medicine, Chinese Academy of Medical Sciences (No. 2019RU013), Hainan Medical University, Haikou 571199, China
| | - Hua Pei
- Department of Clinical Laboratory of the Second Affiliated Hospital, School of Tropical Medicine and Laboratory Medicine, Key Laboratory of Emergency and Trauma of Ministry of Education, Research Unit of Island Emergency Medicine, Chinese Academy of Medical Sciences (No. 2019RU013), Hainan Medical University, Haikou 571199, China
| | - Jinchun Tu
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Delun Chen
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials Science and Engineering, Hainan University, Haikou 570228, China
| | - Qiang Wu
- Department of Clinical Laboratory of the Second Affiliated Hospital, School of Tropical Medicine and Laboratory Medicine, Key Laboratory of Emergency and Trauma of Ministry of Education, Research Unit of Island Emergency Medicine, Chinese Academy of Medical Sciences (No. 2019RU013), Hainan Medical University, Haikou 571199, China
| |
Collapse
|
10
|
Application of Spinel and Hexagonal Ferrites in Heterogeneous Photocatalysis. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112110160] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Semiconducting materials display unique features that enable their use in a variety of applications, including self-cleaning surfaces, water purification systems, hydrogen generation, solar energy conversion, etc. However, one of the major issues is separation of the used materials from the process suspension. Therefore, chemical compounds with magnetic properties have been proposed as crucial components of photocatalytic composites, facilitating separation and recovery of photocatalysts under magnetic field conditions. This review paper presents the current state of knowledge on the application of spinel and hexagonal ferrites in heterogeneous photocatalysis. The first part focuses on the characterization of magnetic (nano)particles. The next section presents the literature findings on the single-phase magnetic photocatalyst. Finally, the current state of scientific knowledge on the wide variety of magnetic-photocatalytic composites is presented. A key aim of this review is to indicate that spinel and hexagonal ferrites are considered as an important element of heterogeneous photocatalytic systems and are responsible for the effective recycling of the photocatalytic materials.
Collapse
|
11
|
Jia H, Wong YL, Wang B, Xing G, Tsoi CC, Wang M, Zhang W, Jian A, Sang S, Lei D, Zhang X. Enhanced solar water splitting using plasmon-induced resonance energy transfer and unidirectional charge carrier transport. OPTICS EXPRESS 2021; 29:34810-34825. [PMID: 34809262 DOI: 10.1364/oe.440777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Solar water splitting by photoelectrochemical (PEC) reactions is promising for hydrogen production. The gold nanoparticles (AuNPs) are often applied to promote the visible response of wideband photocatalysts. However, in a typical TiO2/AuNPs structure, the opposite transfer direction of excited electrons between AuNPs and TiO2 under visible light and UV light severely limits the solar PEC performance. Here we present a unique Pt/TiO2/Cu2O/NiO/AuNPs photocathode, in which the NiO hole transport layer (HTL) is inserted between AuNPs and Cu2O to achieve unidirectional transport of charge carriers and prominent plasmon-induced resonance energy transfer (PIRET) between AuNPs and Cu2O. The measured applied bias photon-to-current efficiency and the hydrogen production rate under AM 1.5G illumination can reach 1.5% and 16.4 μmol·cm-2·h-1, respectively. This work is original in using the NiO film as the PIRET spacer and provides a promising photoelectrode for energy-efficient solar water splitting.
Collapse
|
12
|
DeSario PA, Gordon WO, Balboa A, Pennington AM, Pitman CL, McEntee M, Pietron JJ. Photoenhanced Degradation of Sarin at Cu/TiO 2 Composite Aerogels: Roles of Bandgap Excitation and Surface Plasmon Excitation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:12550-12561. [PMID: 33656870 DOI: 10.1021/acsami.0c21988] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Multifunctional composites that couple high-capacity adsorbents with catalytic nanoparticles (NPs) offer a promising route toward the degradation of organophosphorus pollutants or chemical warfare agents (CWAs). We couple mesoporous TiO2 aerogels with plasmonic Cu nanoparticles (Cu/TiO2) and characterize the degradation of the organophosphorus CWA sarin under both dark and illuminated conditions. Cu/TiO2 aerogels combine high dark degradation rates, which are facilitated by hydrolytically active sites at the Cu||TiO2 interface, with photoenhanced degradation courtesy of semiconducting TiO2 and the surface plasmon resonance (SPR) of the Cu nanoparticles. The TiO2 aerogel provides a high surface area for sarin binding (155 m2 g-1), while the addition of Cu NPs increases the abundance of hydrolytically active OH sites. Degradation is accelerated on TiO2 and Cu/TiO2 aerogels with O2. Under broadband illumination, which excites the TiO2 bandgap and the Cu SPR, sarin degradation accelerates, and the products are more fully mineralized compared to those of the dark reaction. With O2 and broadband illumination, oxidation products are observed on the Cu/TiO2 aerogels as the hydrolysis products subsequently oxidize. In contrast, the photodegradation of sarin on TiO2 is limited by its slow initial hydrolysis, which limits the subsequent photooxidation. Accelerated hydrolysis occurs on Cu/TiO2 aerogels under visible illumination (>480 nm) that excites the Cu SPR but not the TiO2 bandgap, confirming that the Cu SPR excitation contributes to the broadband-driven activity. The high hydrolytic activity of the Cu/TiO2 aerogels combined with the photoactivity upon TiO2 bandgap excitation and Cu SPR excitation is a potent combination of hydrolysis and oxidation that enables the substantial chemical degradation of organophorphorus compounds.
Collapse
Affiliation(s)
- Paul A DeSario
- Surface Chemistry Branch, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Wesley O Gordon
- U.S. Army Combat Capabilities Development Command Chemical Biological Center, 8198 Blackhawk Road, Aberdeen Proving Ground, Maryland 21010, United States
| | - Alex Balboa
- U.S. Army Combat Capabilities Development Command Chemical Biological Center, 8198 Blackhawk Road, Aberdeen Proving Ground, Maryland 21010, United States
| | - Ashley M Pennington
- NRL/NRC Postdoctoral Associate, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Catherine L Pitman
- NRL/NRC Postdoctoral Associate, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Monica McEntee
- U.S. Army Combat Capabilities Development Command Chemical Biological Center, 8198 Blackhawk Road, Aberdeen Proving Ground, Maryland 21010, United States
| | - Jeremy J Pietron
- Former Employee, Surface Chemistry Branch, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| |
Collapse
|
13
|
Synthesis and characterization of Ag@AgCl-reinforced cellulose composites with enhanced antibacterial and photocatalytic degradation properties. Sci Rep 2021; 11:3366. [PMID: 33564010 PMCID: PMC7873269 DOI: 10.1038/s41598-021-82447-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 01/20/2021] [Indexed: 01/28/2023] Open
Abstract
In the present work, Ag@AgCl-reinforced cellulose composites with enhanced antibacterial and photocatalytic degradation properties were successfully synthesized via oil bath heating method. During the process, zinc chloride (ZnCl2) solution was used as both Cl− resource to form AgCl and the solvent to dissolve cellulose. The samples were synthesized with different temperatures, times, and concentrations of ZnCl2 solution. The morphology, microstructure and phase of the as-prepared samples were analyzed with X-ray powder diffraction (XRD), fourier transform infrared (FTIR) spectrometry, scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), photocatalytic activity studies and inhibition zone experiments. Results showed that dye solution could be completely degraded by the materials in 1 h, and higher concentrations of ZnCl2 solution favored for larger inhibition zones (higher to 10.8 mm). This synthetic strategy displayed here offers more possibilities to high value-added applications of cellulose.
Collapse
|
14
|
Wisniewska J, Sobczak I, Ziolek M. The effect of the calcium dopant on the activity and selectivity of gold catalysts supported on SBA-15 and Nb-containing SBA-15 in methanol oxidation. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02135k] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold catalysts based on SBA-15, NbSBA-15 (Nb introduced in one pot synthesis) and Nb2O5/SBA-15 (prepared by impregnation of SBA-15) were doped with calcium species introduced before Au loading and were tested in gas-phase methanol oxidation.
Collapse
Affiliation(s)
- Joanna Wisniewska
- Faculty of Chemistry
- Adam Mickiewicz University, Poznań
- 61-614 Poznań
- Poland
| | - Izabela Sobczak
- Faculty of Chemistry
- Adam Mickiewicz University, Poznań
- 61-614 Poznań
- Poland
| | - Maria Ziolek
- Faculty of Chemistry
- Adam Mickiewicz University, Poznań
- 61-614 Poznań
- Poland
| |
Collapse
|
15
|
Pennington AM, Pitman CL, DeSario PA, Brintlinger TH, Jeon S, Balow RB, Pietron JJ, Stroud RM, Rolison DR. Photocatalytic CO Oxidation over Nanoparticulate Au-Modified TiO2 Aerogels: The Importance of Size and Intimacy. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03640] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ashley M. Pennington
- Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- National Research Council Postdoctoral Associate, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Catherine L. Pitman
- Former NRC Postdoctoral Associate, Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Paul A. DeSario
- Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Todd H. Brintlinger
- Materials Science and Technology Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Seokmin Jeon
- Former NRC Postdoctoral Associate, Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Robert B. Balow
- Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Jeremy J. Pietron
- Former Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Rhonda M. Stroud
- Materials Science and Technology Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Debra R. Rolison
- Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| |
Collapse
|
16
|
Abed J, Rajput NS, Moutaouakil AE, Jouiad M. Recent Advances in the Design of Plasmonic Au/TiO 2 Nanostructures for Enhanced Photocatalytic Water Splitting. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2260. [PMID: 33203122 PMCID: PMC7697928 DOI: 10.3390/nano10112260] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 11/08/2020] [Accepted: 11/13/2020] [Indexed: 02/05/2023]
Abstract
Plasmonic nanostructures have played a key role in extending the activity of photocatalysts to the visible light spectrum, preventing the electron-hole combination and providing with hot electrons to the photocatalysts, a crucial step towards efficient broadband photocatalysis. One plasmonic photocatalyst, Au/TiO2, is of a particular interest because it combines chemical stability, suitable electronic structure, and photoactivity for a wide range of catalytic reactions such as water splitting. In this review, we describe key mechanisms involving plasmonics to enhance photocatalytic properties leading to efficient water splitting such as production and transport of hot electrons through advanced analytical techniques used to probe the photoactivity of plasmonics in engineered Au/TiO2 devices. This work also discusses the emerging strategies to better design plasmonic photocatalysts and understand the underlying mechanisms behind the enhanced photoactivity of plasmon-assisted catalysts.
Collapse
Affiliation(s)
- Jehad Abed
- Department of Materials Science and Engineering, University of Toronto, Toronto, ON M5S 3E4, Canada;
| | - Nitul S Rajput
- Department of Mechanical Engineering, Masdar Institute part of Khalifa University of Science and Technology, Abu Dhabi 54224, UAE;
| | | | - Mustapha Jouiad
- Laboratory of Physics of Condensed Mater, University of Picardie Jules Verne, 80039 Amiens, France
| |
Collapse
|
17
|
Abstract
Plasmonic photocatalysts have been extensively studied for the past decade as a possible solution to energy crisis and environmental problems. Although various reports on plasmonic photocatalysts have been published, including synthesis methods, applications, and mechanism clarifications, the quantum yields of photochemical reactions are usually too low for commercialization. Accordingly, it has been proposed that preparation of plasmonic photocatalysts with efficient light harvesting and inhibition of charge carriers’ recombination might result in improvement of photocatalytic activity. Among various strategies, nano-architecture of plasmonic photocatalysts seems to be one of the best strategies, including the design of properties for both semiconductor and noble-metal-deposits, as well as the interactions between them. For example, faceted nanoparticles, nanotubes, aerogels, and super-nano structures of semiconductors have shown the improvement of photocatalytic activity and stability. Moreover, the selective deposition of noble metals on some parts of semiconductor nanostructures (e.g., specific facets, basal or lateral surfaces) results in an activity increase. Additionally, mono-, bi-, and ternary-metal-modifications have been proposed as the other ways of performance improvement. However, in some cases, the interactions between different noble metals might cause unwanted charge carriers’ recombination. Accordingly, this review discusses the recent strategies on the improvements of the photocatalytic performance of plasmonic photocatalysts.
Collapse
|
18
|
Rolison DR, Pietron JJ, Glaser ER, Brintlinger TH, Yesinowski JP, DeSario PA, Melinger JS, Dunkelberger AD, Miller JB, Pitman CL, Owrutsky JC, Stroud RM, Johannes MD. Power of Aerogel Platforms to Explore Mesoscale Transport in Catalysis. ACS APPLIED MATERIALS & INTERFACES 2020; 12:41277-41287. [PMID: 32814427 DOI: 10.1021/acsami.0c10004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We describe the opportunity to deploy aerogels-an ultraporous nanoarchitecture with co-continuous networks of meso/macropores and covalently bonded nanoparticulates-as a platform to address the nature of the electronic, ionic, and mass transport that underlies catalytic activity. As a test case, we fabricated Au||TiO2 junctions in composite guest-host aerogels in which ∼5 nm Au nanoparticles are incorporated either directly into the anatase TiO2 network (Au "in" TiO2, AuIN-TiO2 aerogel) or deposited onto preformed TiO2 aerogel (Au "on" TiO2, AuON/TiO2 aerogel). The metal-meets-oxide nanoscale interphase as visualized by electron tomography feature extended three-dimensional (3D) interfaces, but AuIN-TiO2 aerogels impose a greater degree of Au contact with TiO2 particles than does the AuON/TiO2 form. Both aerogel variants enable transport of electrons over micrometer-scale distances across the TiO2 network to Au||TiO2 junctions, as evidenced by electron paramagnetic resonance (EPR) and ultrafast visible pump-IR probe time-resolved absorption spectroscopy. The siting of gold nanoparticles in the TiO2 network more effectively disperses trapped electrons. Density functional theory (DFT) calculations find that increased physical contact between Au and TiO2, induced by oxygen vacancies, produces increased hybridization of midgap states and quenches unpaired trapped electrons. We assign the apparent differences in electron-transport capabilities to a combination of the relatively better-wired Au||TiO2 junctions in AuIN-TiO2 aerogels, which have a greater capacity to dilute accumulated charge over a larger interfacial surface area, with an enhanced ability to discharge the accumulated electrons via catalytic reduction of adsorbed O2 to O2- at the interface. Solid-state 1H nuclear magnetic resonance experiments show that proton spin-lattice relaxation times and possibly proton diffusion are strongly coupled to Au||TiO2 interfacial design, likely through spin coupling of protons to unpaired electrons trapped at the TiO2 network. Taken together, our results show that Au||TiO2 interfacial design strongly impacts charge carrier (electron and proton) transport over mesoscale distances in catalytic aerogel architectures.
Collapse
Affiliation(s)
- Debra R Rolison
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Jeremy J Pietron
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Evan R Glaser
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Todd H Brintlinger
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - James P Yesinowski
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Paul A DeSario
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Joseph S Melinger
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Adam D Dunkelberger
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Joel B Miller
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Catherine L Pitman
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Jeffrey C Owrutsky
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Rhonda M Stroud
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Michelle D Johannes
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| |
Collapse
|
19
|
Zhang W, Wang S, Yang SA, Xia XH, Zhou YG. Plasmon of Au nanorods activates metal-organic frameworks for both the hydrogen evolution reaction and oxygen evolution reaction. NANOSCALE 2020; 12:17290-17297. [PMID: 32789321 DOI: 10.1039/d0nr04562d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Electrocatalytic water splitting holds great promise for renewable energy conversion and storage systems. However, it usually suffers from sluggish kinetics, which greatly hinders its real application. Here, we demonstrate the utilization of the localized surface plasmon resonance (LSPR) of Au nanorods (AuNRs) to significantly improve the electroactivity of both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at Co-MOF nanosheets (Co-MOFNs) under different polarizations. Theoretical calculations suggest that the HER enhancement can be largely attributed to the injection of hot electrons from plasmonic AuNRs to Co-MOFN catalysts, which upraises the Fermi level of Co-MOFNs, increasing their reductive activity towards the HER. Regarding the promotion of the OER, it is indicated that the formed holes in Co-MOFNs should majorly locate on the surface oxygen atoms, which may also serve as active positions working jointly with neighboring Co atoms in oxidizing OH-. The plasmon enhanced HER and OER electrocatalysis could also be observed over AuNR/Ni-MOFN and AuNR/NiCo-MOFN catalysts, suggesting the generality of this strategy. This study highlights the possibility of accelerating both the HER and OER efficiency by AuNR plasmonic excitation and provides a new route towards the design of more efficient water splitting systems with the assistance of light energy.
Collapse
Affiliation(s)
- Wenmin Zhang
- Institute of Chemical Biology and Nanomedicine (ICBN), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China.
| | - Shanshan Wang
- Research Laboratory for Quantum Materials, Singapore University of Technology and Design, Singapore, 487372, Singapore and School of Physics, Southeast University, Nanjing, 211189, China
| | - Shengyuan A Yang
- Research Laboratory for Quantum Materials, Singapore University of Technology and Design, Singapore, 487372, Singapore
| | - Xing-Hua Xia
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Yi-Ge Zhou
- Institute of Chemical Biology and Nanomedicine (ICBN), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China.
| |
Collapse
|
20
|
Borgwardt M, Mahl J, Roth F, Wenthaus L, Brauße F, Blum M, Schwarzburg K, Liu G, Toma FM, Gessner O. Photoinduced Charge Carrier Dynamics and Electron Injection Efficiencies in Au Nanoparticle-Sensitized TiO 2 Determined with Picosecond Time-Resolved X-ray Photoelectron Spectroscopy. J Phys Chem Lett 2020; 11:5476-5481. [PMID: 32545961 DOI: 10.1021/acs.jpclett.0c00825] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Progress in the development of plasmon-enabled light-harvesting technologies requires a better understanding of their fundamental operating principles and current limitations. Here, we employ picosecond time-resolved X-ray photoemission spectroscopy to investigate photoinduced electron transfer in a plasmonic model system composed of 20 nm sized gold nanoparticles (NPs) attached to a nanoporous film of TiO2. The measurement provides direct, quantitative access to transient local charge distributions from the perspectives of the electron donor (AuNP) and the electron acceptor (TiO2). On average, approximately two electrons are injected per NP, corresponding to an electron injection yield per absorbed photon of 0.1%. Back electron transfer from the perspective of the electron donor is dominated by a fast recombination channel proceeding on a time scale of 60 ± 10 ps and a minor contribution that is completed after ∼1 ns. The findings provide a detailed picture of photoinduced charge carrier generation in this NP-semiconductor junction, with important implications for understanding achievable overall photon-to-charge conversion efficiencies.
Collapse
Affiliation(s)
- Mario Borgwardt
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Johannes Mahl
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Friedrich Roth
- Institute of Experimental Physics, TU Bergakademie Freiberg, D-09599 Freiberg, Germany
| | - Lukas Wenthaus
- Deutsches Elektronen Synchrotron/DESY, D-22607 Hamburg, Germany
| | - Felix Brauße
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Monika Blum
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Chemical Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Klaus Schwarzburg
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin, Germany
| | - Guiji Liu
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, California 94720, United States
| | - Francesca M Toma
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, California 94720, United States
| | - Oliver Gessner
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| |
Collapse
|
21
|
Probing the dispersivity of tunable refractive index in the visible range by sensitive localized surface plasmon resonance inflection points in single gold nanorods. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
22
|
Ghobadi TGU, Ghobadi A, Soydan MC, Vishlaghi MB, Kaya S, Karadas F, Ozbay E. Strong Light-Matter Interactions in Au Plasmonic Nanoantennas Coupled with Prussian Blue Catalyst on BiVO 4 for Photoelectrochemical Water Splitting. CHEMSUSCHEM 2020; 13:2577-2588. [PMID: 32157799 DOI: 10.1002/cssc.202000294] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 03/06/2020] [Indexed: 05/07/2023]
Abstract
A facial and large-scale compatible fabrication route is established, affording a high-performance heterogeneous plasmonic-based photoelectrode for water oxidation that incorporates a CoFe-Prussian blue analog (PBA) structure as the water oxidation catalytic center. For this purpose, an angled deposition of gold (Au) was used to selectively coat the tips of the bismuth vanadate (BiVO4 ) nanostructures, yielding Au-capped BiVO4 (Au-BiVO4 ). The formation of multiple size/dimension Au capping islands provides strong light-matter interactions at nanoscale dimensions. These plasmonic particles not only enhance light absorption in the bulk BiVO4 (through the excitation of Fabry-Perot (FP) modes) but also contribute to photocurrent generation through the injection of sub-band-gap hot electrons. To substantiate the activity of the photoanodes, the interfacial electron dynamics are significantly improved by using a PBA water oxidation catalyst (WOC) resulting in an Au-BiVO4 /PBA assembly. At 1.23 V (vs. RHE), the photocurrent value for a bare BiVO4 photoanode was obtained as 190 μA cm-2 , whereas it was boosted to 295 μA cm-2 and 1800 μA cm-2 for Au-BiVO4 and Au-BiVO4 /PBA, respectively. Our results suggest that this simple and facial synthetic approach paves the way for plasmonic-based solar water splitting, in which a variety of common metals and semiconductors can be employed in conjunction with catalyst designs.
Collapse
Affiliation(s)
- T Gamze Ulusoy Ghobadi
- UNAM-National Nanotechnology Research Center, Institute of Materials Science and Nanotechnology, Bilkent University, 6800, Ankara, Turkey
| | - Amir Ghobadi
- Department of Electrical and Electronics Engineering, Bilkent University, 06800, Ankara, Turkey
- NANOTAM-Nanotechnology Research Center, Bilkent University, 06800, Ankara, Turkey
| | - Mahmut Can Soydan
- Department of Electrical and Electronics Engineering, Bilkent University, 06800, Ankara, Turkey
- NANOTAM-Nanotechnology Research Center, Bilkent University, 06800, Ankara, Turkey
| | - Mahsa Barzgar Vishlaghi
- Chemistry Department, Koc University, Istanbul, 34450, Turkey
- TUPRAS Energy Center (KUTEM), Koc University, Istanbul, 34450, Turkey
| | - Sarp Kaya
- Chemistry Department, Koc University, Istanbul, 34450, Turkey
- TUPRAS Energy Center (KUTEM), Koc University, Istanbul, 34450, Turkey
| | - Ferdi Karadas
- UNAM-National Nanotechnology Research Center, Institute of Materials Science and Nanotechnology, Bilkent University, 6800, Ankara, Turkey
- Department of Chemistry, Faculty of Science, Bilkent University, 06800, Ankara, Turkey
| | - Ekmel Ozbay
- UNAM-National Nanotechnology Research Center, Institute of Materials Science and Nanotechnology, Bilkent University, 6800, Ankara, Turkey
- Department of Electrical and Electronics Engineering, Bilkent University, 06800, Ankara, Turkey
- NANOTAM-Nanotechnology Research Center, Bilkent University, 06800, Ankara, Turkey
- Department of Physics, Faculty of Science, Bilkent University, 06800, Ankara, Turkey
| |
Collapse
|
23
|
Klemmed B, Besteiro LV, Benad A, Georgi M, Wang Z, Govorov A, Eychmüller A. Hybrid Plasmonic-Aerogel Materials as Optical Superheaters with Engineered Resonances. Angew Chem Int Ed Engl 2020; 59:1696-1702. [PMID: 31638732 PMCID: PMC7003905 DOI: 10.1002/anie.201913022] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Indexed: 01/07/2023]
Abstract
Solar radiation is a versatile source of energy, convertible to different forms of power. A direct path to exploit it is the generation of heat, for applications including passive building heating, but it can also drive secondary energy-conversion steps. We present a novel concept for a hybrid material which is both strongly photo-absorbing and with superior characteristics for the insulation of heat. The combination of that two properties is rather unique, and make this material an optical superheater. To realize such a material, we are combining plasmonic nanoheaters with alumina aerogel. The aerogel has the double function of providing structural support for plasmonic nanocrystals, which serve as nanoheaters, and reducing the diffusion rate of the heat generated by them, resulting in large local temperature increases under a relatively low radiation intensity. This work includes theoretical discussion on the physical mechanisms impacting the system's balanced thermal equilibrium.
Collapse
Affiliation(s)
- Benjamin Klemmed
- Physikalische ChemieTU DresdenBergstrasse 66b01069DresdenGermany
| | - Lucas V. Besteiro
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054China
- Centre Énergie Matériaux et TélécommunicationsInstitut National de la Recherche Scientifique1650 Boul. Lionel BouletVarennesQuebecJ3X 1S2Canada
| | - Albrecht Benad
- Physikalische ChemieTU DresdenBergstrasse 66b01069DresdenGermany
| | | | - Zhiming Wang
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054China
| | - Alexander Govorov
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054China
- Department of Physics and AstronomyOhio UniversityAthensOH45701USA
| | | |
Collapse
|
24
|
Klemmed B, Besteiro LV, Benad A, Georgi M, Wang Z, Govorov A, Eychmüller A. Hybrid Plasmonic–Aerogel Materials as Optical Superheaters with Engineered Resonances. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201913022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Benjamin Klemmed
- Physikalische Chemie TU Dresden Bergstrasse 66b 01069 Dresden Germany
| | - Lucas V. Besteiro
- Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 610054 China
- Centre Énergie Matériaux et Télécommunications Institut National de la Recherche Scientifique 1650 Boul. Lionel Boulet Varennes Quebec J3X 1S2 Canada
| | - Albrecht Benad
- Physikalische Chemie TU Dresden Bergstrasse 66b 01069 Dresden Germany
| | - Maximilian Georgi
- Physikalische Chemie TU Dresden Bergstrasse 66b 01069 Dresden Germany
| | - Zhiming Wang
- Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 610054 China
| | - Alexander Govorov
- Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 610054 China
- Department of Physics and Astronomy Ohio University Athens OH 45701 USA
| | | |
Collapse
|
25
|
Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective. Catalysts 2019. [DOI: 10.3390/catal9121054] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Titania photocatalysts have been intensively examined for both mechanism study and possible commercial applications for more than 30 years. Although various reports have already been published on titania, including comprehensive review papers, the morphology-governed activity, especially for novel nanostructures, has not been reviewed recently. Therefore, this paper presents novel, attractive, and prospective titania photocatalysts, including zero-, one-, two-, and three-dimensional titania structures. The 1D, 2D, and 3D titania structures have been mainly designed for possible applications, e.g., (i) continuous use without the necessity of particulate titania separation, (ii) efficient light harvesting (e.g., inverse opals), (iii) enhanced activity (fast charge carriers’ separation, e.g., 1D nanoplates and 2D nanotubes). It should be pointed out that these structures might be also useful for mechanism investigation, e.g., (i) 3D titania aerogels with gold either incorporated inside the 3D network or supported in the porosity, and (ii) titania mesocrystals with gold deposited either on basal or lateral surfaces, for the clarification of plasmonic photocatalysis. Moreover, 0D nanostructures of special composition and morphology, e.g., magnetic(core)–titania(shell), mixed-phase titania (anatase/rutile/brookite), and faceted titania NPs have been presented, due to their exceptional properties, including easy separation in the magnetic field, high activity, and mechanism clarification, respectively. Although anatase has been usually thought as the most active phase of titania, the co-existence of other crystalline phases accelerates the photocatalytic activity significantly, and thus mixed-phase titania (e.g., famous P25) exhibits high photocatalytic activity for both oxidation and reduction reactions. It is believed that this review might be useful for the architecture design of novel nanomaterials for broad and diverse applications, including environmental purification, energy conversion, synthesis and preparation of “intelligent” surfaces with self-cleaning, antifogging, and antiseptic properties.
Collapse
|
26
|
Wei Z, Endo-Kimura M, Wang K, Colbeau-Justin C, Kowalska E. Influence of Semiconductor Morphology on Photocatalytic Activity of Plasmonic Photocatalysts: Titanate Nanowires and Octahedral Anatase Nanoparticles. NANOMATERIALS 2019; 9:nano9101447. [PMID: 31614677 PMCID: PMC6835321 DOI: 10.3390/nano9101447] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 10/04/2019] [Accepted: 10/04/2019] [Indexed: 02/07/2023]
Abstract
Octahedral anatase particles (OAP) with eight exposed and thermodynamically most stable (101) facets were prepared by an ultrasonication-hydrothermal (US-HT) reaction from potassium titanate nanowires (TNW). The precursor (TNW) and the product (OAP) of US-HT reaction were modified with nanoparticles of noble metals (Au, Ag or Pt) by photodeposition. Samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS), scanning transmission electron microscopy (STEM) and time-resolved microwave conductivity (TRMC). The photocatalytic activity was investigated in three reaction systems, i.e., anaerobic dehydrogenation of methanol and oxidative decomposition of acetic acid under UV/vis irradiation, and oxidation of 2-propanol under vis irradiation. It was found that hydrogen liberation correlated with work function of metals, and thus the most active were platinum-modified samples. Photocatalytic activities of bare and modified OAP samples were much higher than those of TNW samples, probably due to anatase presence, higher crystallinity and electron mobility in faceted NPs. Interestingly, noble metals showed different influence on the activity depending on the semiconductor support, i.e., gold-modified TNW and platinum-modified OAP exhibited the highest activity for acetic acid decomposition, whereas silver- and gold-modified samples were the most active under vis irradiation, respectively. It is proposed that the form of noble metal (metallic vs. oxidized) as well as the morphology (well-organized vs. uncontrolled) have a critical effect on the overall photocatalytic performance. TRMC analysis confirmed that fast electron transfer to noble metal is a key factor for UV activity. It is proposed that the efficiency of plasmonic photocatalysis (under vis irradiation) depends on the oxidation form of metal (zero-valent preferable), photoabsorption properties (broad localized surface plasmon resonance (LSPR)), kind of metal (silver) and counteraction of “hot” electrons back transfer to noble metal NPs (by controlled morphology and high crystallinity).
Collapse
Affiliation(s)
- Zhishun Wei
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China.
- Institute for Catalysis (ICAT), Hokkaido University, N21 W10, Sapporo 001-0021, Japan.
| | - Maya Endo-Kimura
- Institute for Catalysis (ICAT), Hokkaido University, N21 W10, Sapporo 001-0021, Japan.
| | - Kunlei Wang
- Institute for Catalysis (ICAT), Hokkaido University, N21 W10, Sapporo 001-0021, Japan.
| | | | - Ewa Kowalska
- Institute for Catalysis (ICAT), Hokkaido University, N21 W10, Sapporo 001-0021, Japan.
| |
Collapse
|
27
|
Sadrieyeh S, Malekfar R. Mesoporous plasmonic nanocomposites based on Au/Ag-TiO 2 aerogels as SERS substrates. APPLIED OPTICS 2018; 57:10510-10516. [PMID: 30645398 DOI: 10.1364/ao.57.010510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 11/06/2018] [Indexed: 06/09/2023]
Abstract
Au/Ag-TiO2 mesoporous nanocomposite aerogels are special materials that can be applied as efficient surface-enhanced Raman spectroscopy (SERS) substrates, in order to detect low concentration of analytes from aqueous environments. At the same time, they benefit from structural and intrinsic properties of aerogels and TiO2, respectively, and also the plasmonic effects of Au/Ag nanoparticles. Here, several composites of TiO2 aerogel modified with various concentrations of Au, Ag, and a mixture of Au-Ag nanoparticles were prepared by applying two different methods of synthesis. The SERS detection efficiency of the nanocomposites was established by using the dye crystal violate (CV) as the test molecule. The lowest concentration of CV detectable by SERS, which was 10-10 M, was found to depend on the method of synthesis, size, and type of the nanoparticles that were used in the nanocomposite structure. In addition, the morphological and structural characterizations of the nanocomposites were investigated through Brunauer-Emmet-Teller results, field emission scanning electron microscopy (FESEM), and transmission electron microscope images.
Collapse
|
28
|
Xie C, Fan T, Wang A, Chen SL. Enhanced Visible-Light Photocatalytic Activity of a TiO2 Membrane-Assisted with N-Doped Carbon Quantum Dots and SiO2 Opal Photonic Crystal. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b05101] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Chenchen Xie
- State Key Laboratory of Heavy Oil Processing and Department of Chemical Engineering, China University of Petroleum-Beijing, Changping, Beijing 102249, China
| | - Tingting Fan
- State Key Laboratory of Heavy Oil Processing and Department of Chemical Engineering, China University of Petroleum-Beijing, Changping, Beijing 102249, China
| | - Aijun Wang
- State Key Laboratory of Heavy Oil Processing and Department of Chemical Engineering, China University of Petroleum-Beijing, Changping, Beijing 102249, China
| | - Sheng-Li Chen
- State Key Laboratory of Heavy Oil Processing and Department of Chemical Engineering, China University of Petroleum-Beijing, Changping, Beijing 102249, China
| |
Collapse
|
29
|
Wei Z, Janczarek M, Endo M, Wang K, Balčytis A, Nitta A, Méndez-Medrano MG, Colbeau-Justin C, Juodkazis S, Ohtani B, Kowalska E. Noble metal-modified faceted anatase titania photocatalysts: Octahedron versus decahedron. APPLIED CATALYSIS. B, ENVIRONMENTAL 2018; 237:574-587. [PMID: 30532348 PMCID: PMC6100264 DOI: 10.1016/j.apcatb.2018.06.027] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 06/03/2018] [Accepted: 06/09/2018] [Indexed: 05/23/2023]
Abstract
Octahedral anatase particles (OAP, with eight equivalent {101} facets) and decahedral anatase particles (DAP, with two additional {001} facets) were modified with nanoparticles of noble metals (Au, Ag, Cu). The titania morphology, expressed by the presence of different arrangements of exposed crystal facets, played a key role in the photocatalytic properties of metal-modified faceted titania. In the UV/vis systems, two-faceted configuration of DAP was more favorable for the reaction efficiency than single-faceted OAP because of an efficient charge separation described by the transfer of electrons to {101} facets and holes to {001} facets. Time-resolved microwave conductivity (TRMC) and reversed double-beam photoacoustic spectroscopy (RDB-PAS) confirmed that distribution of electron traps (ET) and mobility of electrons were key-factors of photocatalytic activity. In contrast, metal-modified OAP samples had higher photocatalytic activity than metal-modified DAP and metal-modified commercial titania samples under visible light irradiation. This indicates that the presence of single type of facets ({101}) is favorable for efficient electron transfer via shallow ET, whereas intrinsic properties of DAP result in fast charge carriers' recombination when gold is deposited on {101} facets (migration of "hot" electrons: Au→{101}→Au).
Collapse
Affiliation(s)
- Zhishun Wei
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan, 430068, China
- Institute for Catalysis, Hokkaido University, N21, W8, 001-0021, Sapporo, Japan
| | - Marcin Janczarek
- Institute for Catalysis, Hokkaido University, N21, W8, 001-0021, Sapporo, Japan
- Department of Chemical Technology, Gdansk University of Technology, G. Narutowicza 11/12, 80-233, Gdansk, Poland
| | - Maya Endo
- Institute for Catalysis, Hokkaido University, N21, W8, 001-0021, Sapporo, Japan
| | - Kunlei Wang
- Institute for Catalysis, Hokkaido University, N21, W8, 001-0021, Sapporo, Japan
| | - Armandas Balčytis
- Center for Micro-Photonics, Swinburne University of Technology, John St., Hawthorn, 3122 Vic, Australia
| | - Akio Nitta
- Institute for Catalysis, Hokkaido University, N21, W8, 001-0021, Sapporo, Japan
| | - Maria G. Méndez-Medrano
- Laboratory of Physical Chemistry, UMR 8000, University of Paris-Saclay, 91405, Orsay, France
| | | | - Saulius Juodkazis
- Center for Micro-Photonics, Swinburne University of Technology, John St., Hawthorn, 3122 Vic, Australia
| | - Bunsho Ohtani
- Institute for Catalysis, Hokkaido University, N21, W8, 001-0021, Sapporo, Japan
| | - Ewa Kowalska
- Institute for Catalysis, Hokkaido University, N21, W8, 001-0021, Sapporo, Japan
| |
Collapse
|
30
|
Wei Z, Janczarek M, Endo M, Colbeau-Justin C, Ohtani B, Kowalska E. Silver-modified octahedral anatase particles as plasmonic photocatalyst. Catal Today 2018; 310:19-25. [PMID: 30018465 PMCID: PMC5946688 DOI: 10.1016/j.cattod.2017.05.039] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Octahedral anatase particles (OAPs) modified with silver NPs by photodeposition. Ag/OAPs with enhanced photocatalytic activity under both UV and vis irradiation. Electron traps as nucleation sites for silver NPs. Polydispersity of silver NPs results in broad LSPR and thus enhanced vis activity. TRMC data correlate with photocatalytic activity.
Octahedral anatase particles (OAPs) were modified with silver nanoparticles (NPs) by photodeposition method. The properties of OAPs influenced the properties of silver deposits, and thus the photocatalytic activity of the obtained silver-modified OAPs. Photocatalytic activities were tested under UV and vis irradiation for oxidative decomposition of acetic acid and oxidation of 2-propanol, respectively. The properties of silver-modified OAPs were investigated by XRD, STEM, DRS, XPS and time-resolved microwave conductivity (TRMC) method. It was found that electron traps (ETs) worked as nucleation sites for silver, resulting in formation of smaller silver NPs on smaller OAPs with larger content of ETs. The modification with silver resulted in enhanced photocatalytic activity under both UV and vis irradiation. It was found that larger crystallite size of silver NPs, and thus larger polydispersity of silver deposits resulted in broad and intense plasmon resonance peak causing enhanced visible activity. The correlation between photocatalytic activity and TRMC data, e.g., slower decay of TRMC signal for more active samples, allowed discussion on property-governed photocatalytic activities of silver-modified titania.
Collapse
Key Words
- AOPs, advanced oxidation processes
- CDT, time needed for complete deposition of silver
- DRS, diffuse reflectance spectroscopy
- ETs, electron traps
- HT, hydrothermal reaction
- LSPR, localized surface plasmon resonance
- NPs, nanoparticles
- OAPs, octahedral anatase particles
- Octahedral anatase particles
- Photocatalytic activity
- Plasmonic photocatalysts
- SSA, specific surface area
- STEM, scanning transmission electron microscopy
- Silver NPs
- Surface modification
- TNWs, potassium titanate nanowires
- TRMC, time-resolved microwave conductivity
- Titania
- US, ultrasonication
- XPS, X-ray photoelectron spectroscopy
- XRD, X-ray diffraction
Collapse
Affiliation(s)
- Z Wei
- Institute for Catalysis. Hokkaido University, N21, W10, 001-0021, Sapporo, Japan
| | - M Janczarek
- Institute for Catalysis. Hokkaido University, N21, W10, 001-0021, Sapporo, Japan.,Department of Chemical Technology, Gdansk University of Technology, Narutowicza Str. 11/12, 80-233, Gdansk, Poland
| | - M Endo
- Institute for Catalysis. Hokkaido University, N21, W10, 001-0021, Sapporo, Japan
| | - C Colbeau-Justin
- Laboratoire de Chimie Physique, CNRS UMR 8000, Univ. Paris-Sud - Université Paris-Saclay, 91405, Orsay, France
| | - B Ohtani
- Institute for Catalysis. Hokkaido University, N21, W10, 001-0021, Sapporo, Japan
| | - E Kowalska
- Institute for Catalysis. Hokkaido University, N21, W10, 001-0021, Sapporo, Japan
| |
Collapse
|
31
|
Acharya R, Naik B, Parida K. Cr(VI) remediation from aqueous environment through modified-TiO 2-mediated photocatalytic reduction. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:1448-1470. [PMID: 29977679 PMCID: PMC6009310 DOI: 10.3762/bjnano.9.137] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 04/19/2018] [Indexed: 05/21/2023]
Abstract
Cr(VI) exhibits cytotoxic, mutagenic and carcinogenic properties; hence, effluents containing Cr(VI) from various industrial processes pose threat to aquatic life and downstream users. Various treatment techniques, such as chemical reduction, ion exchange, bacterial degradation, adsorption and photocatalysis, have been exploited for remediation of Cr(VI) from wastewater. Among these, photocatalysis has recently gained considerable attention. The applications of photocatalysis, such as water splitting, CO2 reduction, pollutant degradation, organic transformation reactions, N2 fixation, etc., towards solving the energy crisis and environmental issues are briefly discussed in the Introduction of this review. The advantages of TiO2 as a photocatalyst and the importance of its modification for photocatalytic reduction of Cr(VI) has also been addressed. In this review, the photocatalytic activity of TiO2 after modification with carbon-based advanced materials, metal oxides, metal sulfides and noble metals towards reduction of Cr(VI) was evaluated and compared with that of bare TiO2. The photoactivity of dye-sensitized TiO2 for reduction of Cr(VI) was also discussed. The mechanism for enhanced photocatalytic activity was highlighted and attributed to the resultant properties, namely, effective separation of photoinduced charge carriers, extension of the light absorption range and intensity, increase of the surface active sites, and higher photostability. Advantages and limitations for photoreduction of Cr(VI) over modified TiO2 are depicted in the Conclusion. The various challenges that restrict the technology from practical applications in remediation of Cr(VI) from wastewater were addressed in the Conclusion section as well. The future perspectives of the field presented in this review are focused on the development of whole-solar-spectrum responsive, TiO2-coupled photocatalysts which provide efficient photocatalytic reduction of Cr(VI) along with their good recoverability and recyclability.
Collapse
Affiliation(s)
- Rashmi Acharya
- Centre for Nano Science and Nano Technology, Siksha ‘O’ Anusandhan University, Bhubaneswar 751030, India
| | - Brundabana Naik
- Centre for Nano Science and Nano Technology, Siksha ‘O’ Anusandhan University, Bhubaneswar 751030, India
| | - Kulamani Parida
- Centre for Nano Science and Nano Technology, Siksha ‘O’ Anusandhan University, Bhubaneswar 751030, India
| |
Collapse
|
32
|
Jiménez-López J, Linares N, Serrano E, García-Martínez J. Visible-Light-Activated Black Organotitanias: How Synthetic Conditions Influence Their Structure and Photocatalytic Activity. Chempluschem 2018; 83:390-400. [PMID: 31957357 DOI: 10.1002/cplu.201800054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 03/16/2018] [Indexed: 11/10/2022]
Abstract
A series of low-temperature, visible-light-activated black organotitanias were synthesised through a sol-gel strategy that allowed the in situ incorporation of p-phenylenediamine (PPD) into the framework of anatase nanoparticles. The effect of the synthetic conditions on the crystalline structure and photocatalytic activity of these materials was assessed by several characterisation techniques, which revealed a small crystalline domain size (4.6-5.5 nm), effective incorporation of PPD inside the nanoparticles, and a significant reduction in the band gap of these materials (from 3.2 to 2.7-2.9 eV). A systematic study of the synthetic parameters also allowed a significant reduction of the solvent used for the preparation of these black organotitanias (20-fold), as well as the crystallisation time, without compromising the structural properties and photocatalytic activity of these materials. The organotitanias with the highest PPD content and high crystallinity result in the best performing materials in the photocatalytic degradation of rhodamine 6G under both UV- and visible-light irradiation.
Collapse
Affiliation(s)
- Jesús Jiménez-López
- Laboratorio de Nanotecnología Molecular, Departamento de Química Inorgánica, Universidad de Alicante, Ctra. San Vicente-Alicante s/n, 03690, Alicante, Spain
| | - Noemi Linares
- Laboratorio de Nanotecnología Molecular, Departamento de Química Inorgánica, Universidad de Alicante, Ctra. San Vicente-Alicante s/n, 03690, Alicante, Spain
| | - Elena Serrano
- Laboratorio de Nanotecnología Molecular, Departamento de Química Inorgánica, Universidad de Alicante, Ctra. San Vicente-Alicante s/n, 03690, Alicante, Spain
| | - Javier García-Martínez
- Laboratorio de Nanotecnología Molecular, Departamento de Química Inorgánica, Universidad de Alicante, Ctra. San Vicente-Alicante s/n, 03690, Alicante, Spain
| |
Collapse
|
33
|
A Comparative Study of Gold Impregnation Methods for Obtaining Metal/Semiconductor Nanophotocatalysts: Direct Turkevich, Inverse Turkevich, and Progressive Heating Methods. Catalysts 2018. [DOI: 10.3390/catal8040161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
34
|
Nadal E, Barros N, Glénat H, Kachakachi H. Optical Properties of Complex Plasmonic Materials Studied with Extended Effective Medium Theories Combined with Rigorous Coupled Wave Analysis. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E351. [PMID: 29495507 PMCID: PMC5872930 DOI: 10.3390/ma11030351] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 02/20/2018] [Accepted: 02/22/2018] [Indexed: 11/17/2022]
Abstract
In this study we fabricate gold nanocomposites and model their optical properties. The nanocomposites are either homogeneous films or gratings containing gold nanoparticles embedded in a polymer matrix. The samples are fabricated using a recently developed technique making use of laser interferometry. The gratings present original plasmon-enhanced diffraction properties. In this work, we develop a new approach to model the optical properties of our composites. We combine the extended Maxwell-Garnett model of effective media with the Rigorous Coupled Wave Analysis (RCWA) method and compute both the absorption spectra and the diffraction efficiency spectra of the gratings. We show that such a semi-analytical approach allows us to reproduce the original plasmonic features of the composites and can provide us with details about their inner structure. Such an approach, considering reasonably high particle concentrations, could be a simple and efficient tool to study complex micro-structured system based on plasmonic components, such as metamaterials.
Collapse
Affiliation(s)
- Elie Nadal
- University of Perpignan Via Domitia (UPVD), 52 Avenue Paul Alduy, 66100 Perpignan, France.
- Processes, Materials, and Solar Energy Laboratory, CNRS (PROMES-CNRS, UPR 8521), Rambla de la thermodynamique, 66100 Perpignan, France.
| | - Noémi Barros
- University of Perpignan Via Domitia (UPVD), 52 Avenue Paul Alduy, 66100 Perpignan, France.
- Processes, Materials, and Solar Energy Laboratory, CNRS (PROMES-CNRS, UPR 8521), Rambla de la thermodynamique, 66100 Perpignan, France.
| | - Hervé Glénat
- Processes, Materials, and Solar Energy Laboratory, CNRS (PROMES-CNRS, UPR 8521), Rambla de la thermodynamique, 66100 Perpignan, France.
| | - Hamid Kachakachi
- University of Perpignan Via Domitia (UPVD), 52 Avenue Paul Alduy, 66100 Perpignan, France.
- Processes, Materials, and Solar Energy Laboratory, CNRS (PROMES-CNRS, UPR 8521), Rambla de la thermodynamique, 66100 Perpignan, France.
| |
Collapse
|
35
|
Castillo-Robles JM, Orgaz E. Structural and optical properties of Ni atoms and
$$\hbox {Ni}_{55}$$
Ni
55
cluster adsorbed on a rutile
$$\hbox {TiO}_{2}$$
TiO
2
(110) surface. Theor Chem Acc 2018. [DOI: 10.1007/s00214-018-2211-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
36
|
Ma W, Li H, Xu Q, Zhang Y, Wang W, Wang J. Au nanoparticle-doped Co3O4–CoFe2O4@SiO2 as a catalyst for visible-light-driven water oxidation. NEW J CHEM 2018. [DOI: 10.1039/c8nj01729h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Composites of low dielectric constant SiO2, Au and metal oxide was obtained, it showed higher O2 evolution performance due to enhancing the electron transfer rate.
Collapse
Affiliation(s)
- Wenlan Ma
- Key Laboratory of Oil and Gas Fine Chemicals
- Ministry of Education & Xinjiang Uygur. Autonomous Region
- College of Chemistry and Chemical Engineering of Xinjiang University
- Urumqi 830046
- China
| | - Hui Li
- Key Laboratory of Oil and Gas Fine Chemicals
- Ministry of Education & Xinjiang Uygur. Autonomous Region
- College of Chemistry and Chemical Engineering of Xinjiang University
- Urumqi 830046
- China
| | - Qian Xu
- Key Laboratory of Oil and Gas Fine Chemicals
- Ministry of Education & Xinjiang Uygur. Autonomous Region
- College of Chemistry and Chemical Engineering of Xinjiang University
- Urumqi 830046
- China
| | - Yi Zhang
- Key Laboratory of Oil and Gas Fine Chemicals
- Ministry of Education & Xinjiang Uygur. Autonomous Region
- College of Chemistry and Chemical Engineering of Xinjiang University
- Urumqi 830046
- China
| | - Wei Wang
- Key Laboratory of Oil and Gas Fine Chemicals
- Ministry of Education & Xinjiang Uygur. Autonomous Region
- College of Chemistry and Chemical Engineering of Xinjiang University
- Urumqi 830046
- China
| | - Jide Wang
- Key Laboratory of Oil and Gas Fine Chemicals
- Ministry of Education & Xinjiang Uygur. Autonomous Region
- College of Chemistry and Chemical Engineering of Xinjiang University
- Urumqi 830046
- China
| |
Collapse
|
37
|
Nanostar morphology of plasmonic particles strongly enhances photoelectrochemical water splitting of TiO2 nanorods with superior incident photon-to-current conversion efficiency in visible/near-infrared region. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.11.106] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
38
|
Gołąbiewska A, Lisowski W, Jarek M, Nowaczyk G, Michalska M, Jurga S, Zaleska-Medynska A. The effect of metals content on the photocatalytic activity of TiO2 modified by Pt/Au bimetallic nanoparticles prepared by sol-gel method. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.09.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
39
|
Ratchford DC, Dunkelberger AD, Vurgaftman I, Owrutsky JC, Pehrsson PE. Quantification of Efficient Plasmonic Hot-Electron Injection in Gold Nanoparticle-TiO 2 Films. NANO LETTERS 2017; 17:6047-6055. [PMID: 28850243 DOI: 10.1021/acs.nanolett.7b02366] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Excitation of localized surface plasmons in metal nanostructures generates hot electrons that can be transferred to an adjacent semiconductor, greatly enhancing the potential light-harvesting capabilities of photovoltaic and photocatalytic devices. Typically, the external quantum efficiency of these hot-electron devices is too low for practical applications (<1%), and the physics underlying this low yield remains unclear. Here, we use transient absorption spectroscopy to quantify the efficiency of the initial electron transfer in model systems composed of gold nanoparticles (NPs) fully embedded in TiO2 or Al2O3 films. In independent experiments, we measure free carrier absorption and electron-phonon decay in the model systems and determine that the electron-injection efficiency from the Au NPs to the TiO2 ranges from about 25% to 45%. While much higher than some previous estimates, the measured injection efficiency is within an upper-bound estimate based on a simple approximation for the Au hot-electron energy distribution. These results have important implications for understanding the achievable injection efficiencies of hot-electron plasmonic devices and show that the injection efficiency can be high for Au NPs fully embedded within a semiconductor with dimensions less than the Au electron mean free path.
Collapse
Affiliation(s)
- Daniel C Ratchford
- Chemistry Division and ‡Optical Sciences Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Adam D Dunkelberger
- Chemistry Division and ‡Optical Sciences Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Igor Vurgaftman
- Chemistry Division and ‡Optical Sciences Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Jeffrey C Owrutsky
- Chemistry Division and ‡Optical Sciences Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Pehr E Pehrsson
- Chemistry Division and ‡Optical Sciences Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| |
Collapse
|
40
|
Ziegler C, Wolf A, Liu W, Herrmann AK, Gaponik N, Eychmüller A. Moderne Anorganische Aerogele. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611552] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Christoph Ziegler
- Physical Chemistry; Technische Universität Dresden; Bergstraße 66b 01062 Dresden Deutschland
- LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 639798 Singapur
| | - André Wolf
- Physical Chemistry; Technische Universität Dresden; Bergstraße 66b 01062 Dresden Deutschland
| | - Wei Liu
- Physical Chemistry; Technische Universität Dresden; Bergstraße 66b 01062 Dresden Deutschland
| | - Anne-Kristin Herrmann
- Physical Chemistry; Technische Universität Dresden; Bergstraße 66b 01062 Dresden Deutschland
| | - Nikolai Gaponik
- Physical Chemistry; Technische Universität Dresden; Bergstraße 66b 01062 Dresden Deutschland
| | - Alexander Eychmüller
- Physical Chemistry; Technische Universität Dresden; Bergstraße 66b 01062 Dresden Deutschland
| |
Collapse
|
41
|
Ziegler C, Wolf A, Liu W, Herrmann AK, Gaponik N, Eychmüller A. Modern Inorganic Aerogels. Angew Chem Int Ed Engl 2017; 56:13200-13221. [DOI: 10.1002/anie.201611552] [Citation(s) in RCA: 221] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Christoph Ziegler
- Physical Chemistry; Technische Universität Dresden; Bergstrasse 66b 01062 Dresden Germany
- Present address: LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 639798 Singapore
| | - André Wolf
- Physical Chemistry; Technische Universität Dresden; Bergstrasse 66b 01062 Dresden Germany
| | - Wei Liu
- Physical Chemistry; Technische Universität Dresden; Bergstrasse 66b 01062 Dresden Germany
| | - Anne-Kristin Herrmann
- Physical Chemistry; Technische Universität Dresden; Bergstrasse 66b 01062 Dresden Germany
| | - Nikolai Gaponik
- Physical Chemistry; Technische Universität Dresden; Bergstrasse 66b 01062 Dresden Germany
| | - Alexander Eychmüller
- Physical Chemistry; Technische Universität Dresden; Bergstrasse 66b 01062 Dresden Germany
| |
Collapse
|
42
|
DeSario PA, Pietron JJ, Dunkelberger A, Brintlinger TH, Baturina O, Stroud RM, Owrutsky JC, Rolison DR. Plasmonic Aerogels as a Three-Dimensional Nanoscale Platform for Solar Fuel Photocatalysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9444-9454. [PMID: 28723093 DOI: 10.1021/acs.langmuir.7b01117] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We use plasmonic Au-TiO2 aerogels as a platform in which to marry synthetically thickened particle-particle junctions in TiO2 aerogel networks to Au∥TiO2 interfaces and then investigate their cooperative influence on photocatalytic hydrogen (H2) generation under both broadband (i.e., UV + visible light) and visible-only excitation. In doing so, we elucidate the dual functions that incorporated Au can play as a water reduction cocatalyst and as a plasmonic sensitizer. We also photodeposit non-plasmonic Pt cocatalyst nanoparticles into our composite aerogels in order to leverage the catalytic water-reducing abilities of Pt. This Au-TiO2/Pt arrangement in three dimensions effectively utilizes conduction-band electrons injected into the TiO2 aerogel network upon exciting the Au SPR at the Au∥TiO2 interface. The extensive nanostructured high surface-area oxide network in the aerogel provides a matrix that spatially separates yet electrochemically connects plasmonic nanoparticle sensitizers and metal nanoparticle catalysts, further enhancing solar-fuels photochemistry. We compare the photocatalytic rates of H2 generation with and without Pt cocatalysts added to Au-TiO2 aerogels and demonstrate electrochemical linkage of the SPR-generated carriers at the Au∥TiO2 interfaces to downfield Pt nanoparticle cocatalysts. Finally, we investigate visible light-stimulated generation of conduction band electrons in Au-TiO2 and TiO2 aerogels using ultrafast visible pump/IR probe spectroscopy. Substantially more electrons are produced at Au-TiO2 aerogels due to the incorporated SPR-active Au nanoparticle, whereas the smaller population of electrons generated at Au-free TiO2 aerogels likely originate at shallow traps in the high surface-area mesoporous aerogel.
Collapse
Affiliation(s)
- Paul A DeSario
- Code 6100, Chemistry Division and ‡Code 6300, Material Science & Technology Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Jeremy J Pietron
- Code 6100, Chemistry Division and ‡Code 6300, Material Science & Technology Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Adam Dunkelberger
- Code 6100, Chemistry Division and ‡Code 6300, Material Science & Technology Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Todd H Brintlinger
- Code 6100, Chemistry Division and ‡Code 6300, Material Science & Technology Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Olga Baturina
- Code 6100, Chemistry Division and ‡Code 6300, Material Science & Technology Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Rhonda M Stroud
- Code 6100, Chemistry Division and ‡Code 6300, Material Science & Technology Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Jeffrey C Owrutsky
- Code 6100, Chemistry Division and ‡Code 6300, Material Science & Technology Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Debra R Rolison
- Code 6100, Chemistry Division and ‡Code 6300, Material Science & Technology Division, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| |
Collapse
|
43
|
DeSario PA, Pietron JJ, Brintlinger TH, McEntee M, Parker JF, Baturina O, Stroud RM, Rolison DR. Oxidation-stable plasmonic copper nanoparticles in photocatalytic TiO 2 nanoarchitectures. NANOSCALE 2017; 9:11720-11729. [PMID: 28776054 DOI: 10.1039/c7nr04805j] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Ultraporous copper/titanium dioxide (Cu/TiO2) aerogels supporting <5 nm diameter copper nanoparticles are active for surface plasmon resonance (SPR)-driven photocatalysis. The extended nanoscale Cu‖TiO2 junctions in Cu/TiO2 composite aerogels-which arise as a result of photodepositing copper at the surface of the nanoparticulate-bonded TiO2 aerogel architecture-stabilize Cu against oxidation to an extent that preserves the plasmonic behavior of the nanoparticles, even after exposure to oxidizing conditions. The metallicity of the Cu nanoparticles within the TiO2 aerogel is verified by aberration-corrected scanning transmission electron microscopy, electron energy-loss spectroscopy, and infrared spectroscopy using CO binding as a probe to distinguish Cu(0) from Cu(i). In contrast, photoreduction of Cu(ii) at a commercial nanoscale anatase TiO2 powder with primary particle sizes significantly larger than those in the aerogel results in a copper oxide/TiO2 composite that exhibits none of the plasmonic character of Cu nanoparticles. We attribute the persistence of plasmonic Cu nanoparticles without the use of ligand stabilizers to the arrangement of Cu and TiO2 within the aerogel architecture where each Cu nanoparticle is in contact with multiple nanoparticles of the reducing oxide. The wavelength dependence of the photoaction spectra for Cu/TiO2 aerogel films reveals visible-light photocatalytic oxidation activity initiated by an SPR-driven process-as opposed to photo-oxidation initiated by excitation of narrow-bandgap copper oxides.
Collapse
Affiliation(s)
- Paul A DeSario
- Chemistry Division (Code 6100), U.S. Naval Research Laboratory, Washington, D.C. 20375, USA.
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Activation of solid grinding-derived Au/TiO2 photocatalysts for solar H2 production from water-methanol mixtures with low alcohol content. J Catal 2017. [DOI: 10.1016/j.jcat.2017.04.035] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
45
|
Wei Z, Rosa L, Wang K, Endo M, Juodkazis S, Ohtani B, Kowalska E. Size-controlled gold nanoparticles on octahedral anatase particles as efficient plasmonic photocatalyst. APPLIED CATALYSIS. B, ENVIRONMENTAL 2017; 206:393-405. [PMID: 28592914 PMCID: PMC5327951 DOI: 10.1016/j.apcatb.2017.01.043] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Octahedral anatase particles (OAPs), prepared by ultrasonication-hydrothermal reaction (US-HT), were modified with 2 wt% of gold by photodeposition. Conditions of US-HT process such as durations of US and durations of HT were varied to obtain OAPs products different by physicochemical and morphological properties. Au/OAPs samples were characterized by X-ray diffraction (XRD), scanning transmission electron microscopy (STEM), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance spectroscopy (DRS). The photocatalytic activity was tested under UV irradiation for decomposition of acetic acid (CO2 system) and dehydrogenation of methanol (H2 system) under aerobic and anaerobic conditions, respectively, and for oxidation of 2-propanol under visible light irradiation. Photodeposition of gold was very fast for all OAPs samples (0.5-10 min) under Ar atmosphere, and the clear correlation between the content of electron traps (ETs) and the induction period, during which nanoparticles (NPs) of gold are formed, indicates that ETs in titania samples are a key-factor for rapidity of gold photodeposition on titania surface. It was found that better morphology of titania (larger content of faceted particles) resulted in formation of larger gold NPs, while small gold NPs were deposited on structural defects. Modification of OAPs with gold NPs resulted in significant enhancement of photocatalytic activity, being e.g., 1.5 (CO2 system), 7.7 (H2 system), and even more than 40 under vis irradiation. It was found that both the properties of titania and gold are crucial for resultant photocatalytic activity, but a direct correlation between one structural/physical property and photocatalytic activity could not be obtained since all structural properties changed simultaneously when conditions of photocatalyst preparation (US-HT) were changed. Therefore, gold NPs of controlled sizes were deposited on OAPs product with the best morphology by modified photodeposition method. Clear correlation between photocatalytic activity under visible light and the size of gold NPs indicates that gold properties are decisive for visible light activity rather than titania properties. 3D-FDTD simulations confirm that an increase in the size of gold NPs results in extended surface areas with field enhancement.
Collapse
Affiliation(s)
- Zhishun Wei
- Institute for Catalysis, Hokkaido University, N21 W10, 001-0021 Sapporo, Japan
| | - Lorenzo Rosa
- Centre for Micro-Photonics, Swinburne University of Technology, PO Box 218, Hawthorn, 3122 Australia
- Department of Information Engineering, University of Parma, V.le G.P. Usberti 181/A, I-43124 Parma, Italy
| | - Kunlei Wang
- Institute for Catalysis, Hokkaido University, N21 W10, 001-0021 Sapporo, Japan
| | - Maya Endo
- Institute for Catalysis, Hokkaido University, N21 W10, 001-0021 Sapporo, Japan
| | - Saulius Juodkazis
- Centre for Micro-Photonics, Swinburne University of Technology, PO Box 218, Hawthorn, 3122 Australia
| | - Bunsho Ohtani
- Institute for Catalysis, Hokkaido University, N21 W10, 001-0021 Sapporo, Japan
| | - Ewa Kowalska
- Institute for Catalysis, Hokkaido University, N21 W10, 001-0021 Sapporo, Japan
- Corresponding author.
| |
Collapse
|
46
|
Ahn W, Ratchford DC, Pehrsson PE, Simpkins BS. Surface plasmon polariton-induced hot carrier generation for photocatalysis. NANOSCALE 2017; 9:3010-3022. [PMID: 28182184 DOI: 10.1039/c6nr09280b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Non-radiative plasmon decay in noble metals generates highly energetic carriers under visible light irradiation, which opens new prospects in the fields of photocatalysis, photovoltaics, and photodetection. While localized surface plasmon-induced hot carrier generation occurs in diverse metal nanostructures, inhomogeneities typical of many metal-semiconductor plasmonic nanostructures hinder predictable control of photocarrier generation and therefore reproducible carrier-mediated photochemistry. Here, we generate traveling surface plasmon polaritons (SPPs) at the interface between a noble metal/titanium dioxide (TiO2) heterostructure film and aqueous solution, enabling simultaneous optical and electrochemical interrogation of plasmon-mediated chemistry in a system whose resonance may be continuously tuned via the incident optical excitation angle. To the best of our knowledge, this is the first experimental demonstration of SPP-induced hot carrier generation for photocatalysis. We found electrochemical photovoltage and photocurrent responses as SPP-induced hot carriers drive both solution-based oxidation of methanol and the anodic half-reaction of photoelectrochemical water-splitting in sodium hydroxide solution. A strong excitation angle dependence and linear power dependence in the electrochemical photocurrent confirm that the photoelectrochemical reactions are SPP-driven. SPP-generated hot carrier chemistry was recorded on gold and silver and with two different excitation wavelengths, demonstrating potential for mapping resonant charge transfer processes with this technique. These results will provide the design criteria for a metal-semiconductor hybrid system with enhanced hot carrier generation and transport, which is important for the understanding and application of plasmon-induced photocatalysis.
Collapse
Affiliation(s)
- Wonmi Ahn
- National Research Council Postdoctoral Associate, U.S. Naval Research Laboratory, Washington, DC 20375, USA
| | - Daniel C Ratchford
- Chemistry Division, U.S. Naval Research Laboratory, Washington, DC 20375, USA.
| | - Pehr E Pehrsson
- Chemistry Division, U.S. Naval Research Laboratory, Washington, DC 20375, USA.
| | - Blake S Simpkins
- Chemistry Division, U.S. Naval Research Laboratory, Washington, DC 20375, USA.
| |
Collapse
|
47
|
Ding SJ, Yang DJ, Li JL, Pan GM, Ma L, Lin YJ, Wang JH, Zhou L, Feng M, Xu H, Gao S, Wang QQ. The nonmonotonous shift of quantum plasmon resonance and plasmon-enhanced photocatalytic activity of gold nanoparticles. NANOSCALE 2017; 9:3188-3195. [PMID: 28221377 DOI: 10.1039/c6nr08962c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The surface plasmon resonance (SPR) of metal nanoparticles exhibits quantum behaviors as the size decreases owing to the transitions of quantized conduction electrons, but most studies are limited to the monotonous SPR blue-shift caused by off-resonant transitions. Here, we demonstrate the nonmonotonous SPR red-shift caused by resonant electron transitions and photocatalytic activity enhanced by the quantum plasmon resonance of colloidal gold nanoparticles. A maximal SPR wavelength and the largest photocatalytic activity are observed in the quantum regime for the first time for the gold nanoparticles with a diameter of 3.6 nm. Theoretical analysis based on a quantum-corrected model reveals the evolution of SPR with quantized electron transitions and well explains the nonmonotonous size-dependencies of the SPR wavelength and absorption efficiency. These findings have profound implications for the understanding of the quantum nature of the SPR of metal nanoparticles and their applications in areas ranging from photophysics to photochemistry.
Collapse
Affiliation(s)
- Si-Jing Ding
- Department of Physics, Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.
| | - Da-Jie Yang
- The Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China
| | - Jin-Ling Li
- Beijing Computational Science Research Center, Beijing 100193, P. R. China.
| | - Gui-Ming Pan
- Department of Physics, Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.
| | - Liang Ma
- Department of Physics, Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.
| | - Yong-Jie Lin
- The Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China
| | - Jia-Hong Wang
- Department of Physics, Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.
| | - Li Zhou
- Department of Physics, Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.
| | - Min Feng
- The Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China
| | - Hongxing Xu
- Department of Physics, Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, Wuhan University, Wuhan 430072, P. R. China. and The Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China
| | - Shiwu Gao
- Beijing Computational Science Research Center, Beijing 100193, P. R. China.
| | - Qu-Quan Wang
- Department of Physics, Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, Wuhan University, Wuhan 430072, P. R. China. and The Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China
| |
Collapse
|
48
|
Yen YC, Chen JA, Ou S, Chen YS, Lin KJ. Plasmon-Enhanced Photocurrent using Gold Nanoparticles on a Three-Dimensional TiO 2 Nanowire-Web Electrode. Sci Rep 2017; 7:42524. [PMID: 28186170 PMCID: PMC5301249 DOI: 10.1038/srep42524] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 01/11/2017] [Indexed: 11/10/2022] Open
Abstract
In this study, an anatase/rutile mixed-phase titanium dioxide (TiO2) hierarchical network deposited with Au nanoparticles (Au/TiO2 ARHN) was synthesized using a facile hydrothermal method followed by a simple calcination step. Such a unique structure was designed for improving the light harvest, charge transportation/separation, and the performance of photo-electro-chemical (PEC) cells. The properties of the as-synthesized Au/TiO2 ARHN in PEC cells were investigated by electrochemical measurements using a three-electrode system in a 1 M NaOH electrolyte. Remarkably, a 4.5-folds enhancement of the photocurrent for Au/TiO2 ARHN was observed as compared to that for TiO2 nanowire (NW), under AM1.5G solar illumination, suggesting its potential application in PEC cells. A mechanism has been proposed to explain the high photocurrent of Au/TiO2 ARHN in PEC water splitting.
Collapse
Affiliation(s)
- Yin-Cheng Yen
- Department of Chemistry, National Chung Hsing University, Taichung 40227, Taiwan, Republic of China
| | - Jau-An Chen
- Department of Chemistry, National Chung Hsing University, Taichung 40227, Taiwan, Republic of China
| | - Sheng Ou
- Department of Chemistry, National Chung Hsing University, Taichung 40227, Taiwan, Republic of China
| | - Yi-Shin Chen
- Department of Chemistry, National Chung Hsing University, Taichung 40227, Taiwan, Republic of China
| | - Kuan-Jiuh Lin
- Department of Chemistry, National Chung Hsing University, Taichung 40227, Taiwan, Republic of China
| |
Collapse
|
49
|
Enhanced photoelectrochemical and photocatalytic behaviors of MFe2O4 (M = Ni, Co, Zn and Sr) modified TiO2 nanorod arrays. Sci Rep 2016; 6:30543. [PMID: 27464888 PMCID: PMC4964351 DOI: 10.1038/srep30543] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 07/06/2016] [Indexed: 11/08/2022] Open
Abstract
Modified TiO2 nanomaterials are considered to be promising in energy conversion and ferrites modification may be one of the most efficient modifications. In this research, various ferrites, incorporated with various cations (MFe2O4, M = Ni, Co, Zn, and Sr), are utilized to modify the well aligned TiO2 nanorod arrays (NRAs), which is synthesized by hydrothermal method. It is found that all MFe2O4/TiO2 NRAs show obvious red shift into the visible light region compared with the TiO2 NRAs. In particular, NiFe2O4 modification is demonstrated to be the best way to enhance the photoelectrochemical and photocatalytic activity of TiO2 NRAs. Furthermore, the separation and transfer of charge carriers after MFe2O4 modification are clarified by electrochemical impedance spectroscopy measurements. Finally, the underlying mechanism accounting for the enhanced photocatalytic activity of MFe2O4/TiO2 NRAs is proposed. Through comparison among different transition metals modified TiO2 with the same synthesis process and under the same evaluating condition, this work may provide new insight in designing modified TiO2 nanomaterials as visible light active photocatalysts.
Collapse
|
50
|
Li X, Chen F, Lian C, Zheng S, Hu Q, Duo S, Li W, Hu C. Au/TiO2/Graphene Composite with Enhanced Photocatalytic Activity Under Both UV and Visible Light Irradiation. J CLUST SCI 2016. [DOI: 10.1007/s10876-016-1049-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|