Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2022
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IF 3.407
Shuhui Yang,Kunqiang Wang,He Yu,Ying Huang,Peiyuan Guo,Chenxi Ye,He Wen,Gaotian Zhang,Dongxiang Luo,Feng Jiang,Liang Zhang
The research of waste recycling and clean energy are the key to sustainable development. To simultaneously accomplish the waste recycling and clean energy generation, carbon fibers (Fiber) prepared from the spent cigarette filters are utilized to promote the photocatalytic hydrogen evolution efficiency of a heterojunction photocatalyst. The spiral ladder morphology of Fiber supplies abundant loading sites for the ZnIn 2 S 4 /g-C3N 4 photocatalysts, allowing efficient charge separation. Detailed chemical and optical features of the samples are subsequently demonstrated by a combination of scanning electron microscopy, X-ray diffraction, Fourier transform infrared tests. X-ray photoelectron spectrum results reveal that a strong internal electric field was formed between Fiber and ZnIn 2 S 4 /g-C 3 N 4 , allowing sufficient driving force to extract the photo-generated electrons from the heterojunction photocatalyst. Gas chromatography monitors a ca . 37 % enhancement for H 2 evolution (322.41 μmol·g −1 ·h −1 ) compared with control group. This work suggests an attempt to exploit general wastes for promoting photocatalytic hydrogen evolution.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Yingying Qin,Hong Li,Jian Lu,Yonghai Feng,Fanying Meng,Changchang Ma,Yongsheng Yan,Minjia Meng
Fabricating 2D/2D heterojunction with vacancy is more favorable to the spatial separation and transfer of charge owing to the matching of unique 2D structure and vacancy engineering, but the regulation and observation of interlayer forces and electronic structure is a challenging task for synthesizing heterojunction photocatalyst and studying the photocatalytic hydrogen evolution mechanism. Herein, an original 2D/2D ZnIn 2 S 4 /g-C 3 N 4 Van der Waals heterojunction with S vacancies (ZIS-S/CN VDW) photocatalyst are firstly engineered. The optimized 30ZIS-S/g-C 3 N 4 has the highest H 2 evolution rate of 6095.1 μmol h −1 g −1 , which is primarily attributed to the fact that 2D/2D VDW heterojunction possesses larger contact area and strong electronic interaction to stimulate charge kinetics, and the vacancy engineering can enhance light absorption by regulating the electronic band structure and act as effective active sites for capturing electrons. This work not only enriches 2D/2D heterojunction photocatalytic system based on g-C 3 N 4 , but also provides alternative proposal for engineering 2D/2D heterojunction photocatalyst with satisfactory performance.
研究领域:
材料科学
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光催化
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2016
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IF 4.836
Pengxiang Qiu,Jinhua Yao,Huan Chen,Fang Jiang,Xianchuan Xie
ZnIn 2 S 4 /g-C 3 N 4 heterojunction photocatalyst was successfully synthesized via a simple hydrothermal method and applied to visible-light photocatalytic decomposition of 2,4-dichlorophenoxyacetic acid (2,4-D) from aqueous phase. The flower-like ZnIn 2 S 4 particles were dispersed on the surface of g-C 3 N 4 nanosheets in the ZnIn 2 S 4 /g-C 3 N 4 composite. The composite showed higher separation rate of electron-hole pairs as compared to ZnIn 2 S 4 and g-C 3 N 4 . Consequently, the ZnIn 2 S 4 /g-C 3 N 4 composite exhibited enhanced visible light photocatalytic decomposition efficiency of 2,4-D, within 20% ZnIn 2 S 4 /g-C 3 N 4 composite owning the highest photocatalytic efficiency and initial rate. The initial rates of 2,4-D degradation on g-C 3 N 4 , ZnIn 2 S 4 , and 20% ZnIn 2 S 4 /g-C 3 N 4 were 1.23, 0.57 and 3.69 mmol/(g cat h), respectively. The h + and O 2 − were found to be the dominant active species for 2,4-D decomposition. The photocatalytic degradation pathways of 2,4-D by ZnIn 2 S 4 /g-C 3 N 4 under visible light irradiation were explored. The ZnIn 2 S 4 /g-C 3 N 4 composite displayed high photostability in recycling tests, reflecting its promising potential as an effective visible light photocatalyst for 2,4-D treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
RSC Advances
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2022
·Vol. 12
·期 50
·32480-32487
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IF 4.036
Jingzhe Li,Yue Chen,Liezhen Zhu,Linfa Liao,Xinmao Wang,Xun Xu,Lingfang Qiu,Jiangbo Xi,Ping Li,Shuwang Duo
In this study, a novel g-C3N4-based ternary heterojunction was rationally designed and constructed by the in situ growth of ZnIn2S4 nanosheets and CdS nanoparticles onto the g-C3N4 nanosheets using a facile two-step oil-bath method. Through optimizing the proportion of ZnIn2S4 and CdS component, g-C3N4 nanosheets coupled with ZnIn2S4 nanosheets and CdS nanoparticles (denoted as CdS/ZnIn2S4/g-C3N4) exhibited obviously higher photocatalytic properties for RhB removal than the single-component and dual-component systems. Among the as-obtained ternary photocatalysts, it was found that the ternary CdS/ZnIn2S4/g-C3N4-0.2 photocatalyst displayed the optimum photocatalytic property (96%) within a short time (30 min), which was almost 27.42 and 1.17 times higher than that of pure g-C3N4 and binary ZnIn2S4/g-C3N4-0.7 composite. The excellent activity of the ternary CdS/ZnIn2S4/g-C3N4 heterostructure is assigned to the synergetic effects of CdS nanoparticles, ZnIn2S4 nanosheets and g-C3N4 nanosheets, which not only broaden the visible-light absorption range, but also improve the charge mobility and separation rate, thus boosting the visible-light-driven photocatalytic property of g-C3N4.
研究领域:
材料科学
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环境科学
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光催化技术
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产品关联
DOI
PubMed
高影响因子
CARBON
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2022
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IF 11.307
Yuanyuan Shao,Jundie Hu,Tingyu Yang,Xiaogang Yang,Jiafu Qu,Qi Xu,Chang Ming Li
Hydrogen peroxide (H 2 O 2 ) is an important green oxidant for environmental remediation. It is a sustainable strategy to realize solar-driven in- situ H 2 O 2 production for timely using via cascade reactions to sterilization or remove organic pollutants etc. However, how to improve the H 2 O 2 production and consumption abilities of catalysts are the two main challenges. Here we report a superior carbon-related ZnIn 2 S 4 /g-C 3 N 4 catalyst with excellent H 2 O 2 generation and consumption capabilities for efficient sterilization under visible light irradiation. The 2D/2D heterojunction of ZnIn 2 S 4 /g-C 3 N 4 with rapid carrier separation and transfer efficiency exhibits a remarkable H 2 O 2 yield of 4.27 mmol g −1 , which is much higher than that of current catalysts. The in- situ produced H 2 O 2 can be quickly activated to strong oxidizing hydroxyl radicals for sterilization, in which the Escherichia coli ( E. coli ) are fully cleared only within 25 min and 98% of Staphylococcus aureus ( S. aureus ) are killed out after 60 min irradiation. The prepared photocatalysts realize the rapid production and consumption of H 2 O 2 , and this work provides an effect green strategy for sterilization via the in- situ generated H 2 O 2 .
研究领域:
材料科学
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环境科学
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化学工程
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生物技术
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Xiaoqin Sun,Tianyu Wang,Xiaoxiang Xu
Heterojunction photocatalysts possess high efficiency in photogenerated electron-hole separation, which give significant advantages in the field of solar hydrogen production . Herein, a novel ZnIn 2 S 4 @S doped g-C 3 N 4 (ZIS@SCN) heterojunction with mesoporous structure was prepared for photocatalytic water splitting under visible light . Characterization showed that the element of S was successfully introduced into g-C 3 N 4 (CN) by replacing N to form C–S–C bonds and significantly enhanced the visible light absorption ability. The constructed heterojunction exhibited excellent photocatalytic hydrogen evolution under visible light. The best performance belonged to the sample of ZIS@100SCN. The corresponding H 2 production rate reached 9.3 mmol h −1 g −1 , which was 1.87-fold higher than that of the undoped one. More importantly, the heterojunction realized overall water splitting of H 2 and O 2 evolution simultaneously with good stability. The mechanism analysis indicted that introducing the element of S could regulate the band structure of CN and induce the charge transfer switching of a ZnIn 2 S 4 @g-C 3 N 4 (ZIS@CN) photocatalyst from Ⅰ-type to S-scheme, which promoted the efficient spatial charge separation and maintained the high redox ability of the ZIS and SCN. This work provides an insight in construction high performance S-scheme heterojunction for water splitting with a doping method.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
Catalysts
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2025
·Vol. 15
·期 1
·95
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IF 4
Jinghong Fang,Min Wang,Xiaotong Yang,Qiong Sun,Liyan Yu
In this study, a novel Z-scheme heterojunction photocatalyst was developed by integrating g-C3N4nanoplates into ZnIn2S4microspheres. X-ray photoelectron spectroscopy analysis revealed a directional electron transfer from g-C3N4to ZnIn2S4upon heterojunction formation. Under irradiation, electrochemical tests and electron paramagnetic resonance spectroscopy demonstrated significantly enhanced charge generation and separation efficiencies in the ZnIn2S4/g-C3N4composite, accompanied by reduced charge transfer resistance. In photocatalytic CO2reduction, the ZnIn2S4/g-C3N4composite achieved the highest CO yield, 1.92 and 5.83 times higher than those of pristine g-C3N4and ZnIn2S4, respectively, with a notable CO selectivity of 91.3% compared to H2(8.7%). The Z-scheme heterojunction mechanism, confirmed in this work, effectively preserved the strong redox capabilities of the photoinduced charge carriers, leading to superior photocatalytic performance and excellent long-term stability. This study offers valuable insights into the design and development of g-C3N4-based heterojunctions for efficient solar-driven CO2reduction.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Yunqi Ning,Daqi Lv,Qi Tang,Hanbing Wang,Xiaowan Hu,Yuming Cao,Shansheng Yu,Hongwei Tian
Photocatalysts for hydrogen evolution reaction (HER) have widely been explored but fine-tuning and engineering multiphase photocatalyst components are still challenging. Among catalysts, ZnIn 2 S 4 has shown promise but maximizing the use of ZnIn 2 S 4 -photogenerated carriers and enhancing quantum yield still require further investigation. One way to achieve this is by enhancing the photon utilization and reducing the recombination of shallow carriers in ZnIn 2 S 4 . Accordingly, novel ZnIn 2 S 4 /g-C 3 N 4 /MoS 2 type-II heterojunction composites with 2D/2D/2D structures (abbreviated ZIS/CN/MS) were synthesized in the present work by simple thermal condensation-solvothermal method. The optimized ZIS/CN/MS exhibited a photocatalytic hydrogen evolution rate of 13.6 mmol g −1 h −1 under visible light (λ ≥ 420 nm) irradiation, a value much higher than those of pure-phases ZIS and CN, as well as the binary composite of ZIS/CN. The apparent quantum efficiency of the optimized ZIS/CN/MS at a wavelength of 420 nm reached 27.0 % coupled with excellent cycling stability. The significantly improved photocatalytic performance and the excellent stability can mainly be attributed to the unique 2D/2D/2D arrangement of the ternary components of ZIS, CN, and MS in ZIS/CN/MS photocatalyst, providing a large number of close interfacial contacts between the components for shortened migration distance of photogenerated charges and more pathways for electron separation and transport in type-II heterostructures. Overall, the proposed methodology and ZIS/CN/MS composites with type-II heterojunction and 2D/2D/2D structures have great potential for use in solar-to-hydrogen energy conversion and can be extended to the preparation of other photocatalysts.
研究领域:
材料科学
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能源科学
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化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Lin Jin,Yajuan Wei,Lanlan Feng,Yuwen Wang,Shuang Liu,Junwei Zhang,Ruoxuan Ma,Xueying Shao,Xuan Zhang,Demeng Kong,Zibo Zhao,Wei Zhang,Jia Liu,Jingbo Zhang
The construction of ultra-close 2D atomic-thickness Van der Waals heterojunctions with high-speed charge transfer still faces challenges. Here, we synthesized single-layer ZnIn 2 S 4 and g-C 3 N 4 , and introduced silver single atoms to regulate Van der Waals heterojunctions at the atomic level to optimize charge transfer and catalytic activity. At the atomic scale, the impact of detailed structural differences between the two characteristic surfaces of ZnIn 2 S 4 ([Zn-S 4 ] and [In-S 4 ]) on catalytic performance has been first proposed. Experiments combined with the DFT study demonstrate that single atom Ag not only acts as a charge transfer bridge but also regulates the energy band and intrinsic catalytic activity. Benefiting from the enhanced electron delocalization, the synthesized catalyst ZIS/Ag@CN exhibits excellent photocatalytic performance, with a hydrogen production rate of 5.50 mmol·g −1 ·h −1 , which is much higher than the reported Ag-based single-atom catalysts so far. This work provides a new understanding of atomic-level heterojunction interface regulation and modification.
研究领域:
材料科学
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化学
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催化
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纳米技术
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能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）