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Shi J, Yang T, Zhao T, Pu K, Shi J, Zhou A, Li H, Wang S, Xue J. Insights on the efficiency and contribution of single active species in photocatalytic degradation of tetracycline: Priority attack active sites, intermediate products and their toxicity evaluation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 367:121970. [PMID: 39106792 DOI: 10.1016/j.jenvman.2024.121970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 07/14/2024] [Accepted: 07/18/2024] [Indexed: 08/09/2024]
Abstract
Photocatalysis has been proven to be an excellent technology for treating antibiotic wastewater, but the impact of each active species involved in the process on antibiotic degradation is still unclear. Therefore, the S-scheme heterojunction photocatalyst Ti3C2/g-C3N4/TiO2 was successfully synthesized using melamine and Ti3C2 as precursors by a one-step calcination method using mechanical stirring and ultrasound assistance. Its formation mechanism was studied in detail through multiple characterizations and work function calculations. The heterojunction photocatalyst not only enabled it to retain active species with strong oxidation and reduction abilities, but also significantly promoted the separation and transfer of photo-generated carriers, exhibiting an excellent degradation efficiency of 94.19 % for tetracycline (TC) within 120 min. Importantly, the priority attack sites, degradation pathways, degradation intermediates and their ecological toxicity of TC under the action of each single active species (·O2-, h+, ·OH) were first positively explored and evaluated through design experiments, Fukui function theory calculations, HPLC-MS, Escherichia coli toxicity experiments, and ECOSAR program. The results indicated that the preferred attack sites of ·O2- on TC were O20, C7, C11, O21, and N25 atoms with high f+ value. The toxicity of intermediates produced by ·O2- was also lower than those produced by h+ and ·OH.
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Affiliation(s)
- Jianhui Shi
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China.
| | - Tiantian Yang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Ting Zhao
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Kaikai Pu
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Jiating Shi
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Aijuan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Houfen Li
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Sufang Wang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Jinbo Xue
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan, 030024, PR China
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Wei C, Zhang Y, Qu Y, Hua W, Jia Z, Lu J, Xie G, Xiao J, Hu H, Yang Y, Liu JQ, Bai J, Xue G. Dual Channel H 2O 2 Photosynthesis in Pure Water over S-Scheme Heterojunction Cs 3PMo 12/CC Boosted by Proton and Electron Reservoirs. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401485. [PMID: 38712455 DOI: 10.1002/smll.202401485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 04/24/2024] [Indexed: 05/08/2024]
Abstract
Dual channel photo-driven H2O2 production in pure water on small-scale on-site setups is a promising strategy to provide low-concentrated H2O2 whenever needed. This process suffers, however, strongly from the fast recombination of photo-generated charge carriers and the sluggish oxidation process. Here, insoluble Keggin-type cesium phosphomolybdate Cs3PMo12O40 (abbreviated to Cs3PMo12) is introduced to carbonized cellulose (CC) to construct S-scheme heterojunction Cs3PMo12/CC. Dual channel H2O2 photosynthesis from both H2O oxidation and O2 reduction in pure water has been thus achieved with the production rate of 20.1 mmol L-1 gcat. -1 h-1, apparent quantum yield (AQY) of 2.1% and solar-to-chemical conversion (SCC) efficiency of 0.050%. H2O2 accumulative concentration reaches 4.9 mmol L-1. This high photocatalytic activity is guaranteed by unique features of Cs3PMo12/CC, namely, S-scheme heterojunction, electron reservoir, and proton reservoir. The former two enhance the separation of photo-generated charge carriers, while the latter speeds up the torpid oxidation process. In situ experiments reveal that H2O2 is formed via successive single-electron transfer in both channels. In real practice, exposing the reaction system under natural sunlight outdoors successfully results in 0.24 mmol L-1 H2O2. This work provides a key practical strategy for designing photocatalysts in modulating redox half-reactions in photosynthesis.
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Affiliation(s)
- Chong Wei
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, 1 Xuefu Ave., Xi'an, 710127, China
| | - Yu Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, 1 Xuefu Ave., Xi'an, 710127, China
| | - Yunteng Qu
- State Key Laboratory of Photoelectric Technology and Functional Materials, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Institute of Photonics & PhotonTechnology, Northwest University, Xi'an, 710069, China
- Shaanxi Key Laboratory for Carbon Neutral Technology, Northwest University, Xi'an, 710127, China
| | - Wenbo Hua
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, 1 Xuefu Ave., Xi'an, 710127, China
| | - Zixian Jia
- SINOPEC Dalian Research Institute of Petroleum and Petrochemicals Co., Ltd, Dalian, 116045, China
| | - Jiangbo Lu
- School of Physics & Information Technology, Shaanxi Normal University, Xi'an, Shaanxi, 710062, China
| | - Gang Xie
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, 1 Xuefu Ave., Xi'an, 710127, China
- Shaanxi Key Laboratory for Carbon Neutral Technology, Northwest University, Xi'an, 710127, China
| | - Jianming Xiao
- Department College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Huaiming Hu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, 1 Xuefu Ave., Xi'an, 710127, China
| | - Ying Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, 1 Xuefu Ave., Xi'an, 710127, China
- Shaanxi Key Laboratory for Carbon Neutral Technology, Northwest University, Xi'an, 710127, China
| | - Ji-Quan Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, 1 Xuefu Ave., Xi'an, 710127, China
- Shaanxi Key Laboratory for Carbon Neutral Technology, Northwest University, Xi'an, 710127, China
| | - Jinbo Bai
- CentraleSupélec, ENS Paris-Saclay, CNRS, LMPS-Laboratoire de Mécanique Paris-Saclay, Université Paris-Saclay, 8-10 rue Joliot-Curie, Gif-sur-Yvette, 91190, France
| | - Ganglin Xue
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, 1 Xuefu Ave., Xi'an, 710127, China
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Nie L, Chen H, Wang J, Yang Y, Fang C. Enhanced Visible-Light H 2O 2 Production over Pt/g-C 3N 4 Schottky Junction Photocatalyst. Inorg Chem 2024; 63:4770-4782. [PMID: 38409795 DOI: 10.1021/acs.inorgchem.4c00075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Photocatalytic for hydrogen peroxide (H2O2) production is thought as a promising technology owing to its clean and green properties with the cheap and easily available raw materials of H2O and O2. Herein, Pt/g-C3N4 Schottky junction photocatalysts with ultralow Pt contents (0.025-0.1 wt %) were successfully fabricated by an impregnation-reduction method. It can efficiently reduce O2 to generate H2O2 without a sacrificial agent under visible-light irradiation. The yield of H2O2 produced over Pt0.05/g-C3N4 with the optimal 0.05 wt % Pt reached 31.82 μM, which was 2.46 times that of g-C3N4 and higher than most of those in the literature. It also showed good stability in three repeated tests. The deposition of highly dispersed metal Pt nanoparticles with low and limited content can expose enough active Pt atoms, significantly enhance the separation efficiency of photogenerated carriers, and reduce its negative effect on H2O2 decomposition, resulting in improved and outstanding efficiency of H2O2 production. The ·O2- radicals were found to be the main active species. The mechanism of photocatalytic H2O2 production was confirmed to be a two-step single electron route (O2 + e-→ ·O2- → H2O2).
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Affiliation(s)
- Longhui Nie
- School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Heng Chen
- School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Jing Wang
- School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Yiqiong Yang
- School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Caihong Fang
- School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China
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Liu X, Liu H, Wang Y, Zheng X, Xu H, Ding J, Sun J, Jiang T, Li Q, Liu Y. A facile approach for sulphur and nitrogen co-doped carbon nanodots to improve photothermal eradication of drug-resistant bacteria. Biochem Biophys Res Commun 2023; 671:301-308. [PMID: 37327701 DOI: 10.1016/j.bbrc.2023.06.028] [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: 04/25/2023] [Accepted: 06/07/2023] [Indexed: 06/18/2023]
Abstract
In this study, we produced S, N co-doped CNDs (SN@CNDs) by using dimethyl sulfoxide (DMSO) and formamide (FA) as single sources of S and N, respectively. We varied the S/N ratios by adjusting the volume ratios of DMSO and FA and investigated their effect on the red-shift of the CNDs' absorption peak. Our findings demonstrate that SN@CNDs synthesized using a volume ratio of 5:6 between DMSO and FA exhibit the most significant absorption peak redshift and enhanced near-infrared absorption performance. Based on comparative analysis of the particle size, surface charge, and fluorescence spectrum of the S@CNDs, N@CNDs, and SN@CNDs, we propose a possible mechanism to explain the change of optical properties of CNDs due to S, N doping. Co-doping creates a more uniform and smaller band gap, resulting in a shift of the Fermi level and a change in energy dissipation from radioactive to non-radiative decay. Importantly, the as-prepared SN@CNDs exhibited a photothermal conversion efficiency of 51.36% at 808 nm and demonstrated exceptional photokilling effects against drug-resistant bacteria in both in vitro and in vivo experiments. Our facile method for synthesizing S and N co-doped CNDs can be extended to the preparation of other S and N co-doped nanomaterials, potentially improving their performance.
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Affiliation(s)
- Xinyue Liu
- School of Life Sciences, Ludong University, Yantai, 264025, China
| | - Huaze Liu
- School of Life Sciences, Ludong University, Yantai, 264025, China
| | - Yu Wang
- School of Life Sciences, Ludong University, Yantai, 264025, China
| | - Xueliang Zheng
- School of Life Sciences, Ludong University, Yantai, 264025, China
| | - Hui Xu
- Huzhou Key Laboratory of Green Energy Materials and Battery Cascade Utilization, School of Intelligent Manufacturing, Huzhou College, Huzhou, 313000, China
| | - Juan Ding
- School of Life Sciences, Ludong University, Yantai, 264025, China
| | - Jie Sun
- School of Life Sciences, Ludong University, Yantai, 264025, China
| | - Tingting Jiang
- School of Life Sciences, Ludong University, Yantai, 264025, China.
| | - Qin Li
- School of Life Sciences, Ludong University, Yantai, 264025, China.
| | - Yang Liu
- School of Life Sciences, Ludong University, Yantai, 264025, China.
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Shi J, Wang H, Nie J, Yang T, Ju C, Pu K, Shi J, Zhao T, Li H, Xue J. Alkali-assisted engineering of ultrathin graphite phase carbon nitride nanosheets with carbon vacancy and cyano group for significantly promoting photocatalytic hydrogen peroxide generation under visible light: fast electron transfer channel. J Colloid Interface Sci 2023; 643:47-61. [PMID: 37044013 DOI: 10.1016/j.jcis.2023.03.209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/13/2023] [Accepted: 03/31/2023] [Indexed: 04/08/2023]
Abstract
Exfoliating bulk graphite phase carbon nitride (g-C3N4) into 2D nanosheets is considered to be an effective method to enhance its photocatalytic activity. However, optical absorption capacity of the exfoliated g-C3N4 nanosheets are lower than that of the original bulk g-C3N4 due to the quantum size effect. Here, the ultrathin graphite phase carbon nitride nanosheets containing both carbon vacancy and cyano group (UCNS580) were prepared by two-step calcination in air with the assistance of KOH. The formation and position of carbon vacancy and cyano group were first investigated and determined. The simultaneous introduction of carbon vacancy and cyano group not only improved light absorption range and intensity of g-C3N4 nanosheets, but also more importantly constructed a fast transfer channel for photogenerated electrons, further enhancing the separation efficiency and migration ability of photogenerated carriers. The cyano group as the accumulation center of photogenerated electrons and the oxygen adsorption center increased the proportion of one-step two-electrons reaction path to efficiently generate H2O2. As a result, UCNS580 exhibited highly boosted H2O2 generation activity, its H2O2 production yield for 6 h reached 939 µmol/L and the formation rate was up to 4167 µM h-1 g-1, which was in priority in the reported literature under the same conditions.
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Affiliation(s)
- Jianhui Shi
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China.
| | - Hui Wang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Jianhui Nie
- Department of Mechanical and Electrical Engineering, Jinzhong Vocational and Technical College, Jinzhong, PR China
| | - Tiantian Yang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Chenke Ju
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Kaikai Pu
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Jiating Shi
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Ting Zhao
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Houfen Li
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
| | - Jinbo Xue
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, PR China
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Xu J, Yu T, Zhao G, Wang J. Enhancing oxidation ability of graphitic carbon nitride photocatalysts to promote lignin C α-C β bond cleavage in micellar aqueous media. Int J Biol Macromol 2023; 236:124029. [PMID: 36924872 DOI: 10.1016/j.ijbiomac.2023.124029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 02/16/2023] [Accepted: 03/08/2023] [Indexed: 03/15/2023]
Abstract
As the most abundant aromatic resource, lignin is an appreciated biomass material to obtain aromatic high-value chemicals. However, the selective cleavage of lignin Cα-Cβ bonds under mild conditions constitutes a challenge. Herein, a photocatalyst having high oxidation capacity was successfully synthesized by codoping S and Cl atoms into graphite carbon nitride (g-C3N4). The resulting S,Cl/CN-1.5 photocatalyst exhibits enhanced photogenerated electron-hole separation ability and higher valence band potential than g-C3N4. S,Cl/CN-1.5 can efficiently break lignin Cα-Cβ bonds in micellar aqueous medium to produce benzaldehyde and benzyl alcohol as the main products. Mechanism studies show that the photocatalytic cleavage of lignin Cα-Cβ bonds proceeds via single-electron transfer and Cβ radical mechanisms in which hydroxyl radicals and photogenerated holes play an important role. Isotopic experiments show that the O atoms required for the photocatalytic cleavage of lignin Cα-Cβ bonds come from water in the micellar aqueous medium based on the full contact between water and substrate. Although O2 atmosphere is beneficial for the photocatalytic efficiency, O2 is not necessary for the photocatalytic cleavage of lignin Cα-Cβ bonds. This research provides a useful guide for designing efficient photocatalysts to depolymerize lignin into high-value chemicals.
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Affiliation(s)
- Jie Xu
- College of Material and Chemical Engineering, Chuzhou University, Chuzhou, Anhui 239000, China.
| | - Tao Yu
- College of Material and Chemical Engineering, Chuzhou University, Chuzhou, Anhui 239000, China
| | - Ge Zhao
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 610000, China
| | - Jinyu Wang
- College of Material and Chemical Engineering, Chuzhou University, Chuzhou, Anhui 239000, China
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Wudil Y, Ahmad U, Gondal M, Al-Osta MA, Almohammedi A, Said R, Hrahsheh F, Haruna K, Mohammed J. Tuning of Graphitic Carbon Nitride (g-C3N4) for Photocatalysis: A Critical Review. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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Prusty D, Mansingh S, Priyadarshini N, Parida KM. Defect Control via Compositional Engineering of Zn-Cu-In-S Alloyed QDs for Photocatalytic H 2O 2 Generation and Micropollutant Degradation: Affecting Parameters, Kinetics, and Insightful Mechanism. Inorg Chem 2022; 61:18934-18949. [DOI: 10.1021/acs.inorgchem.2c02977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Deeptimayee Prusty
- Centre for Nanoscience and Nanotechnology, Siksha “O” Anusandhan (Deemed to be University), Bhubaneswar751030, Odisha, India
| | - Sriram Mansingh
- Centre for Nanoscience and Nanotechnology, Siksha “O” Anusandhan (Deemed to be University), Bhubaneswar751030, Odisha, India
| | - Newmoon Priyadarshini
- Centre for Nanoscience and Nanotechnology, Siksha “O” Anusandhan (Deemed to be University), Bhubaneswar751030, Odisha, India
| | - K. M. Parida
- Centre for Nanoscience and Nanotechnology, Siksha “O” Anusandhan (Deemed to be University), Bhubaneswar751030, Odisha, India
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