Nanoscale Research Letters
·
2018
·Vol. 13
·期 1
·1-8
·
IF 3.125
Lu Junlin,Shang Chaoqun,Meng Qingguo,Lv Haiqin,Chen Zhihong,Liao Hua,Li Ming,Zhang Yongguang,Jin Mingliang,Yuan Mingzhe,Wang Xin,Zhou Guofu
A series of novel visible light driven all-solid-state Z-scheme BiOBr 0.3 I 0.7 /Ag/AgI photocatalysts were synthesized by facile in situ precipitation and photo-reduction methods. Under visible light irradiation, the BiOBr 0.3 I 0.7 /Ag/AgI samples exhibited enhanced photocatalytic activity compared to BiOBr 0.3 I 0.7 and AgI in the degradation of methyl orange (MO). The optimal ratio of added elemental Ag was 15%, which degraded 89% of MO within 20 min. The enhanced photocatalytic activity of BiOBr 0.3 I 0.7 /Ag/AgI can be ascribed to the efficient separation of photo-generated electron–hole pairs through a Z-scheme charge-carrier migration pathway, in which Ag nanoparticles act as electron mediators. The mechanism study indicated that ·O 2 − and h + are active radicals for photocatalytic degradation and that a small amount of ·OH also participates in the photocatalytic degradation process.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Mengxia Ma,Xu Yan,Yanli Mao,Haiyan Kang,Qun Yan,Jieqiang Zhou,Zhongxian Song,Han Zhu,Leqi Cui,Yanna Li
Titanium silicon molecular sieve (TS-1) is an oxidation catalyst that possesses a long lifetime of charge transfer excited state, high Ti utilization efficiency, large specific surface area, and good adsorption property; therefore, TS-1 acts as a Ti-based photocatalyst candidate. In this work, TS-1 coupled Bi2MoO6 (TS-1/BMO) photocatalysts were fabricated via a facile hydrothermal route. Interestingly, the optimized TS-1/BMO-1.0 catalyst exhibited a decent photodegradation property toward tetracycline hydrochloride (85.49% in 120 min) under the irradiation of full spectrum light, which were 4.38 and 1.76 times compared to TS-1 and BMO, respectively. The enhanced photodegradation property of the TS-1/BMO-1.0 catalyst could be attributed to the reinforced light-harvesting capacity of the photocatalyst, high charge mobility, and suitable band structure for tetracycline hydrochloride degradation. In addition, the mechanism of photocatalytic degradation of tetracycline hydrochloride by the TS-1/BMO-1.0 catalyst was reasonably proposed based on the band structure, trapping, and ESR tests. This research provided feasible ideas for the design and construction of high-efficiency photocatalysts for contaminant degradation.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Catalysts
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2025
·Vol. 15
·期 3
·266
·
IF 4
Lei Yang,Lihui Wang,Han Xiao,Di Luo,Jiangzhi Zi,Guisheng Li,Zichao Lian
The efficient separation of photo-generated electrons and holes is significantly importance for enhancing photocatalytic performance. However, there are few reports on precisely constructing interfaces within a single nanocrystal to investigate the mechanism of photoinduced carrier transfer. In this study, nanorod heterodimer-structured CuS/ZnxCd1−xS heteronanocrystals (CuS/ZnCdS HNCs) were successfully synthesized as a typical model to explore the photoinduced carrier dynamics in the photocatalytic hydrogen evolution reaction (HER). The CuS/ZnCdS HNCs exhibited a photocatalytic hydrogen evolution activity of 146 mmol h⁻1g⁻1under visible light irradiation, which is higher than most reported values. Moreover, after 15 h of hydrogen production cycling tests, we found that the material maintained high hydrogen production performance, indicating excellent stability. The CuS/ZnCdS HNCs achieved an apparent quantum yield (AQY) of 69.2% at 380 nm, which is the highest value reported so far for ZnCdS- or CuS-based photocatalysts. The remarkable activity and stability of the CuS/ZnCdS HNCs were attributed to the strong internal electric field (IEF) and Z-scheme mechanism, which facilitate efficient charge separation, as demonstrated by in situ X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses. This discovery provides a new approach for constructing Z-scheme heterogeneous copper-based nanocomposites within nanocrystals and offers guidance for improving photocatalytic activity.
研究领域:
材料科学
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光催化
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纳米技术
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DOI
高影响因子
Surfaces and Interfaces
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2024
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IF 5.7
Hao Wang,Qian Liu,Tingting Ji,Ruiyang Zhao,Lu Li,Jishu Han,Lei Wang
The construction of heterojunction is an effective and controllable method to improve the photocatalytic decomposition of water to produce hydrogen by semiconductor photocatalyst . In this paper, NiCo 2 S 4 yolk-shell nanospheres and Mn 0.8 Cd 0.2 S nanoparticles were synthesised by solvothermal and hydrothermal methods , and then Mn 0.8 Cd 0.2 S nanoparticles were loaded onto the surface of NiCo 2 S 4 to form a dense Z-scheme heterojunction . Without precious metals as cocatalysts, the maximum hydrogen production of the optimized Mn 0.8 Cd 0.2 S/NiCo 2 S 4 reached 21.41 mmol·g −1 ·h −1 . The morphology, structure and optical properties of the prepared samples were characterized, and the experimental results and theoretical calculations showed that Mn 0.8 Cd 0.2 S/NiCo 2 S 4 with Z-scheme heterojunction could improve the efficiency of photocatalytic hydrogen production by effectively transferring and separating the photogenerated electrons and holes.
研究领域:
材料科学
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光催化
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纳米技术
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能源材料
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Hainan Wei,Fanming Meng,Jialong Li,Wenqing Yu,Han Zhang
Antibiotics have gradually become a new pollutant in water, which seriously threatens human health. The development of efficient and easily recyclable photocatalysts is urgently needed to achieve water purification. Herein, a novel FeIn 2 S 4 /Bi 2 MoO 6 Z-scheme heterostructural composite is successfully synthesized by a simple heat-shrinkable polymerization solvothermal method. When the doping FeIn 2 S 4 mass fraction is 10%, the degradation rate of tetracycline hydrochloride (TCH) is the highest, reaching 83.25%, which is 1.97 and 2.38 times higher than that of pure FeIn 2 S 4 and Bi 2 MoO 6 , respectively. After five consecutive cycles, the degradation rate still reached 72.35%, which has high photocatalytic stability. Combined with energy band structure analysis, active substance capture experiments and modeling with density functional theory calculations confirm the photocatalytic mechanism of Z-scheme heterostructure. This project proposes a promising and feasible method for the preparation of Z-scheme heterostructured photocatalysts.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2022
·Vol. 48
·期 10
·4163-4182
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IF 3.134
Yang Fanger,Zhang Haowen,Tang Qi,Lu Shihui,Zhang Hongsheng,Zheng Xiaohua
Photocatalysis is considered to be one of the possible routes to solve energy crises at a low cost. Graphitic-C 3 N 4 combined with other semiconductors at the nanoscale has demonstrated a promising potential in photocatalysis application owing to the heterojunction configuration. In this study, Ag/g-C 3 N 4 /CuNb 2 O 6 -4 (mass ratio of CuNb 2 O 6 to g-C 3 N 4 = 1:4) composites were prepared by photo-deposition of Ag particles on the hydrothermally synthesized g-C 3 N 4 /CuNb 2 O 6 -4 composites. The microstructure, morphology, and light absorption property of the photocatalysts were characterized by X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV–Vis diffuse reflectance spectroscopy. The photocatalytic properties of photocatalysts and active species responsible for the degradation of RhB dye under visible light were investigated. After loading Ag particles on the g-C 3 N 4 /CuNb 2 O 6 -4 composites, the resulting Ag/g-C 3 N 4 /CuNb 2 O 6 -4 composites show a bandgap of ~ 2.31 eV and a significant increase in photocatalytic efficiency. In particular, the photocatalytic activity of 11% Ag/g-C 3 N 4 /CuNb 2 O 6 -4 composite (Ag mass fraction = 11%) is nearly seven times that of orthorhombic CuNb 2 O 6 and 3.8 times that of g-C 3 N 4 /CNO-4 composite. The Z-scheme heterojunction has been successfully formed in the Ag/g-C 3 N 4 /CuNb 2 O 6 -4 composites and it enhances the photocatalytic performance significantly with the best degradation efficiency of 88% after 2 h.
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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DOI
高影响因子
Journal of Physical Chemistry C
·
2023
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IF 3.7
Zesheng Deng,Jiazhen Cao,Songchang Hu,Shiqun Wu,Mingyang Xing,Jinlong Zhang
CO2 photoreduction is considered one of the potential ways to achieve carbon neutralization since it uses green solar energy without introducing additional carbon sources during the process of converting CO2 to fuels. However, limited light utilization and poor charge separation often give rise to undesirable CO2 photoreduction performance. Herein, a generic approach using carbon spheres as templates to construct transition metal oxides with multishelled hollow structures is reported. The multishelled hollow structure has been proven to be efficient for improving CO2 photoreduction. Furthermore, we constructed a Z-scheme heterojunction photocatalyst (CdS/Au/ZnCrO4) through introducing CdS into a multishelled hollow ZnCrO4 sphere with Au nanoparticles as a charge transfer medium. Benefiting from the multishelled hollow structure’s induced light utilization and large surface area and Z-scheme heterojuncion promoted charge separation, a high CO production of 2.95 μmol g–1 h–1 was achieved on CdS/Au/ZnCrO4 without using any sacrificial agents, which was 18.4 times and 24.6 times higher than that of CdS and ZnCrO4. This work provides a generic method for constructing controllable multishelled hollow spheres and is expected to offer guidance for promoting CO2 photoreduction through structure regulation and heterojunction construction.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 20
·6045-6057
·
IF 7
Fuyan Kang,Xiaona Jiang,Yao Wang,Juanna Ren,Ben Bin Xu,Guoyang Gao,Zhanhua Huang,Zhanhu Guo
Photocatalytic treatment of antibiotics in aqueous ecosystems has become a promising method. However, the low efficiency photogenerated charge separation and slow kinetics of the catalyst severely limit its deployment for industrial applications. Here, the three-dimensional bismuth tungstate (Bi2WO6)/bismuth oxyiodide (BiOI) loaded on biochar (BC/BWI) composite catalyst was designed for the efficient removal of tetracycline (adsorption capacity: 227.09 mg g−1, removal rate: 99.8%). Via construction of Z-scheme heterojunctions at the interface of Bi2WO6 and BiOI, the built-in electric field promotes the directional separation of photogenerated carriers to achieve efficient separation and utilization of photogenerated charges. Meanwhile, the introduction of electron-rich biochar (BC) effectively enhances the adsorption performance, photogenerated electron migration capacity and mass transfer process of the material. The introduction of BC and the building of Z-scheme heterojunctions effectively achieve the spatially synergistic separation of photogenerated charges. The ˙O2− dominates the photocatalytic process, according to the mechanistic studies. The degradation intermediate product testing revealed that tetracycline is efficiently degraded through two main pathways. This work provides ideas for the design of catalysts for the efficient removal of antibiotics from water bodies.
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
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yidong Sun,Xingpu Wang,Qiang Fu,Chunxu Pan
It is of great significance to construct heterojunctions using industrially produced co-catalysts. The direct Z-scheme composite photocatalyst provides an effective separation of photogenerated carriers. Herein, a kind of novel 2D/3D direct Z-scheme NiFe-LDH/Zn0.5Cd0.5S is prepared. Compared with fresh catalysts, the NiFe-layered double hydroxide (LDH)/Zn0.5Cd0.5S composite exhibits advantages including excellent visible light response ability and photoelectric performance and improved H2 evolution rate by 11.6 times. Combining with theoretical calculations, ESR, XPS, and experimental results, the direct Z-scheme mechanism of the photocatalytic reaction is proposed. There is a channel for electron transfer between Zn0.5Cd0.5S and NiFe-LDH, and the electrons of Zn0.5Cd0.5S directly combine with the valence band holes of NiFe-LDH. Finally, the electrons remaining on NiFe-LDH can reduce H+ to generate H2. This process effectively achieves separation of photogenerated carriers and increases photocatalytic H2 evolution.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tingting Yang,Bin Wang,Xingwang Yan,Gaopeng Liu,Junze Zhao,Mengxia Ji,Paul K. Chu,Jiexiang Xia,Huaming Li
Semiconductor photocatalysis technology is a promising technique for the environmental remediation and new energy development. It is of importance to design the photocatalysts with wide spectral response, high carrier separation efficiency and high redox capacity for the photocatalysis. Herein, a CuS/In 2 S 3 Z-scheme heterojunction is designed and constructed by a one-step hydrothermal method. UPS, free radicals trapping experiments and ESR confirm that the electrons are transferred from CuS to In 2 S 3 through the Z-Scheme mechanism. Benefiting from the construction of Z-scheme heterostructure, the separation of photogenerated carriers is more effective and the redox capacity of the pristine materials reserves the maximum. Compared to pure CuS and In 2 S 3 , CuS/ In 2 S 3 -4 represents the best photocatalytic performance boosting degradation rates of MBT that are 28.1 and 21.7 times higher than this of the CuS and In 2 S 3 , respectively. In the photocatalytic process, ·O 2 - and h + are the main active species. Bean sprout planting experiment showed that the toxicity of the solution decreased after degradation. This work provides a new method of constructing a high-performance Z-scheme heterojunction material for improving the activity and efficiency of the photocatalysts.
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
PLANT CELL AND ENVIRONMENT
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2018
·Vol. 42
·期 4
·1352-1367
·
IF 5.415
Tingting Jing,Na Zhang,Ting Gao,Mingyue Zhao,Jieyang Jin,Yongxian Chen,Miaojing Xu,Xiaochun Wan,Wilfried Schwab,Chuankui Song
Plants emit a variety of volatiles in response to herbivore attack, and (Z)-3-hexenol and its glycosides have been shown to function as defence compounds. Although the ability to incorporate and convert (Z)-3-hexenol to glycosides is widely conserved in plants, the enzymes responsible for the glycosylation of (Z)-3-hexenol remained unknown until today. In this study, uridine-diphosphate-dependent glycosyltransferase ( UGT ) candidate genes were selected by correlation analysis and their response to airborne (Z)-3-hexenol, which has been shown to be taken up by the tea plant. The allelic proteins UGT85A53-1 and UGT85A53-2 showed the highest activity towards (Z)-3-hexenol and are distinct from UGT85A53-3, which displayed a similar catalytic efficiency for (Z)-3-hexenol and nerol. A single amino acid exchange E59D enhanced the activity towards (Z)-3-hexenol, whereas a L445M mutation reduced the catalytic activity towards all substrates tested. Transient overexpression of CsUGT85A53-1 in tobacco significantly increased the level of (Z)-3-hexenyl glucoside. The functional characterization of CsUGT85A53 as a (Z)-3-hexenol UGT not only provides the foundation for the biotechnological production of (Z)-3-hexenyl glucoside but also delivers insights for the development of novel insect pest control strategies in tea plant and might be generally applicable to other plants.
研究领域:
植物学
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分子生物学
·
昆虫学
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DOI
PubMed
高影响因子
Molecular Catalysis
·
2019
·
IF 2.938
Haibin Wang,Shaodong Liu,Tingting Sun,Zhanao Lv,Zhen Zhan,Guochuan Yin,Zhuqi Chen
In catalytic double bond migration reaction, E -configuration olefins were normally generated as the dominant product because E -configuration was thermodynamically favored. However, Z-configuration products are sometimes desired in pharmaceutical chemistry owing to the structure-activity relationship. In this paper, we have demonstrated a new strategy that Lewis acid promoted an widely employed and convenient ruthenium(II) complex for the catalytic isomerization of O-allylethers, leading to thermodynamic-unfavored Z-product under mild conditions. The model substrate of allyl phenyl ether can be simply scaled up to 20 mmol to produce Z-product with TON of 2453 and TOF of 13,430 h −1 at 40–60 °C. The system of Ru(II)/Lewis Acid catalysts was suitable for various substituted O -allylethers and other types of substrates. Through mechanism study including kinetic study, ligand inhibition effect and molecular spectroscopy, the dissociation of PPh 3 ligand by the addition of Lewis acid, and the formation a five-membered Ru complex from anchimeric assistance were both recognized as essential steps to improve the reactivity and to control the stereoselectivity of catalytic double bond migration reaction through metal hydride addition-elimination mechanism. This new strategy may provide a new opportunity to produce thermodynamic-unfavored product in heterocyclic compounds for pharmaceutical chemistry.
研究领域:
有机化学
·
药物化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）