|
1
|
Song M, Shao H, Chen Y, Deng X, Chen Y, Yao Y, Lu S, Liao X. Visible light-driven H 2O 2 synthesis over Au/C 3N 4: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H 2O 2 decomposition. Phys Chem Chem Phys 2022; 24:29557-29569. [PMID: 36448564 DOI: 10.1039/d2cp04202a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Visible light-driven H2O2 production presents the unique merits of sustainability and environmental friendliness. The size of noble metal nanoparticles (NPs) determines their dispersion and electronic structure and greatly affects their photocatalytic activity. In this work, a series of sized Au NPs over C3N4 were modulated for H2O2 production. The results show that there is a volcanic trend in H2O2 with the decrease of Au particle size, and the highest H2O2 production rate of 1052 μmol g-1 h-1 is obtained from medium-sized Au particles (∼8.7 nm). The relationship between structure and catalytic performance is supported by experimental and theoretical methods. (1) First, medium-sized Au NPs promote photon absorption, and have a suitable built-in electric field at the heterojunction, which can be successfully tuned to achieve a more efficient h+-e- spatial separation. (2) Second, medium-sized Au NPs enhance O2 adsorption, and create selective 2e- O2 reduction reaction sites. (3) Particularly, medium-sized Au NPs promote the desorption of produced H2O2 and inhibit H2O2 decomposition, finally leading to the highest H2O2 selectivity. Excellent catalytic performance will be obtained by finely optimizing the particle size in a certain range. This work provides a new idea for preparing high efficiently photocatalysts for H2O2 production.
Collapse
Affiliation(s)
- Mengzhen Song
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Huijuan Shao
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Yi Chen
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Xiangyang Deng
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Yanyan Chen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, P. O. Box 165, Taiyuan, Shanxi, China
| | - Yue Yao
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Shuxiang Lu
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Xiaoyuan Liao
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| |
Collapse
|
|
2
|
Tang W, Zhang Y, Qi X, Duanmu Y, Yao Y. Photochemical Method for Laser Absorption. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4384. [PMID: 36558237 PMCID: PMC9783274 DOI: 10.3390/nano12244384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/03/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
During the laser application process, laser energy is usually converted into heat energy, causing high temperature, which affects the (high-speed) aircraft in routine flight. A completely novel photochemical method was investigated to potentially minimize the energy effect of the laser beam. Ag nanoparticles/C3N4 were synthesized by an ultra-low temperature reduced deposit method with Ag mean diameters of 5-25 nm for photofixation of N2. The absorption performance of laser can be improved by using appropriate charge density and small size Ag metal particles. The energy absorption rate was 7.1% over Ag/C3N4 (-40) at 5 mJ/cm2 of laser energy.
Collapse
Affiliation(s)
- Weiwei Tang
- Guangzhou Maritime University, Guangzhou 510330, China
| | - Yinuo Zhang
- Tianjin University of Science and Technology, Tianjin 300457, China
| | - Xingyu Qi
- Hebei University of Technology, Tianjin 300131, China
| | - Yu Duanmu
- Guangzhou Maritime University, Guangzhou 510330, China
| | - Yue Yao
- Tianjin University of Science and Technology, Tianjin 300457, China
| |
Collapse
|
|
3
|
Dehghani Z, Azizi-Toupkanloo H, Nadafan M, Guirao JL. The effect of Ag on the structural, dielectric, linear and third-order nonlinear optical properties of graphitic carbon nitride nanosheets. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
|
4
|
Sazanova TS, Mochalov LA, Logunov AA, Kudryashov MA, Fukina DG, Vshivtsev MA, Prokhorov IO, Yunin PA, Smorodin KA, Atlaskin AA, Vorotyntsev AV. Influence of Temperature Parameters on Morphological Characteristics of Plasma Deposited Zinc Oxide Nanoparticles. NANOMATERIALS 2022; 12:nano12111838. [PMID: 35683699 PMCID: PMC9182487 DOI: 10.3390/nano12111838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 05/19/2022] [Accepted: 05/25/2022] [Indexed: 01/14/2023]
Abstract
Zinc oxide nanoparticles were obtained by plasma-enhanced chemical vapor deposition (PECVD) under optical emission spectrometry control from elemental high-purity zinc in a zinc–oxygen–hydrogen plasma-forming gas mixture with varying deposition parameters: a zinc source temperature, and a reactor temperature in a deposition zone. The size and morphological parameters of the zinc oxide nanopowders, structural properties, and homogeneity were studied. The study was carried out with use of methods such as scanning electron microscopy, X-ray structural analysis, and Raman spectroscopy, as well as statistical methods for processing and analyzing experimental data. It was established that to obtain zinc oxide nanoparticles with a given size and morphological characteristics using PECVD, it is necessary (1) to increase the zinc source temperature to synthesize more elongated structures in one direction (and vice versa), and (2) to decrease the reactor temperature in the deposition zone to reduce the transverse size of the deposited structures (and vice versa), taking into account that at relatively low temperatures instead of powder structures, films can form.
Collapse
Affiliation(s)
- Tatyana Sergeevna Sazanova
- Laboratory of Membrane and Catalytic Processes, Nanotechnology and Biotechnology Department, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Minin Str. 24, 603950 Nizhny Novgorod, Russia;
- Correspondence:
| | - Leonid Alexandrovich Mochalov
- Chemical Engineering Laboratory, Research Institute for Chemistry, Lobachevsky State University of Nizhny Novgorod, Gagarin Ave. 23, 603022 Nizhny Novgorod, Russia; (L.A.M.); (A.A.L.); (M.A.K.); (D.G.F.); (M.A.V.); (I.O.P.); (K.A.S.)
| | - Alexander Alexandrovich Logunov
- Chemical Engineering Laboratory, Research Institute for Chemistry, Lobachevsky State University of Nizhny Novgorod, Gagarin Ave. 23, 603022 Nizhny Novgorod, Russia; (L.A.M.); (A.A.L.); (M.A.K.); (D.G.F.); (M.A.V.); (I.O.P.); (K.A.S.)
| | - Mikhail Alexandrovich Kudryashov
- Chemical Engineering Laboratory, Research Institute for Chemistry, Lobachevsky State University of Nizhny Novgorod, Gagarin Ave. 23, 603022 Nizhny Novgorod, Russia; (L.A.M.); (A.A.L.); (M.A.K.); (D.G.F.); (M.A.V.); (I.O.P.); (K.A.S.)
| | - Diana Georgievna Fukina
- Chemical Engineering Laboratory, Research Institute for Chemistry, Lobachevsky State University of Nizhny Novgorod, Gagarin Ave. 23, 603022 Nizhny Novgorod, Russia; (L.A.M.); (A.A.L.); (M.A.K.); (D.G.F.); (M.A.V.); (I.O.P.); (K.A.S.)
| | - Maksim Anatolevich Vshivtsev
- Chemical Engineering Laboratory, Research Institute for Chemistry, Lobachevsky State University of Nizhny Novgorod, Gagarin Ave. 23, 603022 Nizhny Novgorod, Russia; (L.A.M.); (A.A.L.); (M.A.K.); (D.G.F.); (M.A.V.); (I.O.P.); (K.A.S.)
| | - Igor Olegovich Prokhorov
- Chemical Engineering Laboratory, Research Institute for Chemistry, Lobachevsky State University of Nizhny Novgorod, Gagarin Ave. 23, 603022 Nizhny Novgorod, Russia; (L.A.M.); (A.A.L.); (M.A.K.); (D.G.F.); (M.A.V.); (I.O.P.); (K.A.S.)
| | - Pavel Andreevich Yunin
- Department for Technology of Nanostructures and Devices, Institute for Physics of Microstructures of the Russian Academy of Science, Academic Str. 7, Afonino, 603087 Nizhny Novgorod, Russia;
| | - Kirill Alexandrovich Smorodin
- Chemical Engineering Laboratory, Research Institute for Chemistry, Lobachevsky State University of Nizhny Novgorod, Gagarin Ave. 23, 603022 Nizhny Novgorod, Russia; (L.A.M.); (A.A.L.); (M.A.K.); (D.G.F.); (M.A.V.); (I.O.P.); (K.A.S.)
| | - Artem Anatolevich Atlaskin
- Laboratory of SMART Polymeric Materials and Technologies, Mendeleev University of Chemical Technology, Miusskaya Sq. 9, 125047 Moscow, Russia;
| | - Andrey Vladimirovich Vorotyntsev
- Laboratory of Membrane and Catalytic Processes, Nanotechnology and Biotechnology Department, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Minin Str. 24, 603950 Nizhny Novgorod, Russia;
- Chemical Engineering Laboratory, Research Institute for Chemistry, Lobachevsky State University of Nizhny Novgorod, Gagarin Ave. 23, 603022 Nizhny Novgorod, Russia; (L.A.M.); (A.A.L.); (M.A.K.); (D.G.F.); (M.A.V.); (I.O.P.); (K.A.S.)
| |
Collapse
|
|
5
|
The Growth of Metal–Organic Frameworks in the Presence of Graphene Oxide: A Mini Review. MEMBRANES 2022; 12:membranes12050501. [PMID: 35629825 PMCID: PMC9143871 DOI: 10.3390/membranes12050501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 04/30/2022] [Accepted: 05/04/2022] [Indexed: 11/17/2022]
Abstract
Integrated metal–organic frameworks (MOFs) with graphene oxide (GO) have aroused huge interest in recent years due to their unique properties and excellent performance compared to MOFs or GO alone. While a lot of attention has been focused on the synthesis methodologies and the performance analysis of the composite materials in recent years, the fundamental formation/crystallization mechanism(s) is (are) still not fully understood. Ascribed to the distinctive structural and functional properties of GO, the nucleation and crystallization process of MOFs could be altered/promoted, forming MOF/GO composite materials with different nanostructures. Furthermore, the MOF’s parental structure could also influence how the GO and MOF bond together. Thus, this short review attempted to provide critical and indepth discussions of recent research results with a particular focus on the factors that influence the directional growth of parent MOFs in the presence of graphene oxide. Due to the unique structure and enhanced properties, the derived MOF/GO composites have a wide range of applications including gas separation, electrochemistry, and photocatalysis. We hope this review will be of interest to researchers working on MOF design, crystal structure control (e.g., orientation), and composite materials development.
Collapse
|