CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yixue Xu,Xiaoli Jin,Teng Ge,Haiquan Xie,Ruixue Sun,Fengyun Su,Xin Li,Liqun Ye
The van der Waals (vdW) heterojunction formed between two-dimensional materials can break the anisotropy of the electron beam and is an effective method to improve the photocatalytic performance. Herein, vdW heterostructure is successfully constructed between layered Bi 3 O 4 Cl and 2D g-C 3 N 4 for photocatalytic CO 2 reduction. The weak vdW interaction enables Bi 3 O 4 Cl/g-C 3 N 4 with desirable moderate bandgap and built-in electronic field, which can efficiently separate the electron-hole pairs. As a result, Bi 3 O 4 Cl/g-C 3 N 4 heterostructures exhibit better photocatalytic CO 2 reduction activity compared with pure Bi 3 O 4 Cl and g-C 3 N 4 . The optimized Bi 3 O 4 Cl/20%g-C 3 N 4 possesses the highest CO 2 conversion efficiency with CO and CH 4 generation rate of 6.6 and 1.9 μmol g −1 h −1 , respectively. This work not only reports an effective reference for vdW heterojunction system based on Bi-based and g-C 3 N 4 semiconductors, but also contributes to engineering vdW heterojunctions for satisfactory solar energy conversion performance.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 65
·37200-37207
·
IF 2.936
Enhui Jiang,Xiaoteng Liu,Huinan Che,Chunbo Liu,Hongjun Dong,Guangbo Che
In this study, a novel Ag/Bi3O4Cl photocatalyst has been synthesized by a facile photodeposition process. Its photocatalytic performance was evaluated from the degradation of tetracycline (TC) under visible light irradiation (λ > 420 nm). The 1.0 wt% Ag/Bi3O4Cl photocatalyst could significantly enhance the degradation of TC compared with pure Bi3O4Cl, with the degradation level reaching 94.2% in 120 minutes. The enhancement of photocatalytic activity could be attributed to the synergetic effect of the photogenerated electrons (e−) of Bi3O4Cl and the surface plasmon resonance (SPR) caused by Ag nanoparticles, which could improve the absorption capacity of visible light and facilitate the separation of photogenerated electron–hole pairs. In addition, electron spin resonance (ESR) analysis and trapping experiments demonstrated that the superoxide radicals (˙O2−), hydroxyl radicals (˙OH) and holes (h+) played crucial roles in the photocatalytic process of TC degradation. The present work provides a promising approach for the development of highly efficient photocatalysts to address current environmental pollution, energy issues and other related areas.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Meng Du,Shiyu Zhang,Zipeng Xing,Zhenzi Li,Peng Chen,Kai Pan,Wei Zhou
The dual plasmons (Bi, Ag)-based direct Z-scheme Bi 3 O 4 Cl/AgCl heterojunction ultrathin nanosheets are successfully synthesized by hydrothermal combined with solid-state reduction strategy. The plasmons Ag and Bi are formed during solid-state reduction process, which are firmly anchored on surface of Bi 3 O 4 Cl and AgCl, respectively, and favors the charge transfer obviously. Experiments results confirm the formation of heterojunction ultrathin nanosheets with the main size of 200∼300 nm and the thickness of <10 nm. The obtained dual plasmons-based direct Z-scheme Bi 3 O 4 Cl/AgCl heterojunction ultrathin nanosheets with the band gap of ∼1.66 eV exhibit excellent photothermal performance. 98.3% of Cr (VI) can be photocatalytic reduced and TOC removal rate of ceftriatone sodium reached 98.9% within 210 min, respectively. Due to the surface plasma resonance, the catalyst temperature increases obviously, indicating the enhanced photothermal performance, which is favorable for promoting the photocatalytic performance. Moreover, the cyclic stability experiment also proves the high stability and has advantages in practical applications. The excellent property can be ascribed to the direct Z-scheme accelerating charge transfer and prolonging the lifetimes, the dual plasmons enhancing photothermal performance and the spatial separation of photogenerated charge carriers.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Enhui Jiang,Ning Song,Xiaoxu Zhang,Lili Yang,Chunbo Liu,Hongjun Dong
It is highly desirable to develop an in-situ fabrication route by facile pH control strategy to prepare Z-scheme heterostructure photocatalyst for producing more firm and intimate interfacial interaction, which will be in favor of removing pollutants in water under the visible light. Herein, the new highly-efficient visible-light-driven Z-scheme Bi 3 O 4 Cl/Bi 12 O 17 Cl 2 heterostructure is prepared by in-situ growth method and this research explores a novel pathway to interconvert Bi 12 O 17 Cl 2 and Bi 3 O 4 Cl by facile pH control strategy. The Z-scheme Bi 3 O 4 Cl/Bi 12 O 17 Cl 2 heterostructure exhibits splendid universal photocatalytic degradation activities to degrade various pollutants under visible light irradiation. The Z-scheme heterostructure and the strong interfacial coupling effect produced by in-situ growth of Bi 3 O 4 Cl on the surface of Bi 12 O 17 Cl 2 are the main reasons to enhance photocatalytic performance. Furthermore, the possible photocatalytic reaction mechanisms including migration and transport behaviors of charge carriers, generation process of reactive species and degradation intermediate products of 2, 4-dichlorophenol are revealed in depth. This proposes a novel design concept to prepare highly-efficient, stable and visible-light-driven Z-scheme photocatalyst, which is expected to be widely applied for the universal removal of multiple pollutants in wastewater efficiently.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Boran Xu,Yandong Li,Yangqin Gao,Shuang Liu,Da Lv,Sujun Zhao,Hang Gao,Guoqing Yang,Ning Li,Lei Ge
A novel plasmonic photocatalysts of Ag-AgI/Bi 3 O 4 Cl was successfully synthesized via a simple and mild wet-chemical process. The 30 wt% Ag-AgI/Bi 3 O 4 Cl photocatalyst showed the highest photocatalytic activity for degradation of methyl orange (MO) under visible light (5 W LED lamp), which represents a 3.2 and 7.4 times enhancement in the photocatalytic degradation efficiency as compared to pure Bi 3 O 4 Cl and Ag-AgI, respectively. The surface plasmon resonance (SPR) effect of Ag nanoparticles (NPs) was detected by the UV–vis diffusion reflectance spectroscopy (DRS) and surface photovoltage (SPV) measurement, finding that the SPR effect of Ag extends the absorption and photo-response range in the Ag-AgI/Bi 3 O 4 Cl composite photocatalyst. Based on the analysis of electron spin resonance (ESR), linear sweeping voltammetry (LSV) characterization results, three electron transfer processes were proposed: AgI CB → Bi 3 O 4 Cl CB , AgI CB → Ag and methyl orange → Ag. Such electron transfer paths can not only effectively improve the separation efficiency of photo-generated carriers, but also ensure the stability of the catalyst. This study can provide a novel insight for modification of other desirable semiconductor materials to achieve high photocatalytic activity.
研究领域:
材料科学
·
环境化学
·
物理化学
·
纳米催化
·
半导体光催化
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Congcong Wu,Minghui Fu,Wenbo Zhai,Yujing Tang,Changhao Men,Yi Yu,Hung-Ta Wang
Bismuth oxychlorides are emerging two-dimensional wide-bandgap semiconductors with exceptional potential for advanced photoelectric applications. Elastic strain engineering is a promising strategy to enhance their photoelectric performances. However, fundamental elastic properties of bismuth oxychlorides are largely unknown. In this work, atomic force microscopy based nanoindentations were employed to characterize sub 5 nm thick freestanding BiOCl and Bi3O4Cl circular membranes, and recorded elastic responses were analyzed using a nonlinear membrane model. Experimentally acquired Young’s moduli and breaking strains of BiOCl and Bi3O4Cl membranes indicate a Cl–Cl interfacial shear effect in epitaxially grown BiOCl and a process-induced defect effect in the phase-transformed Bi3O4Cl. Built atomistic models illustrated bond strain behaviors of structurally symmetric BiOCl and asymmetric Bi3O4Cl and enabled predictions of strain-mediated interlayer electric fields and electronic structures. These results provide fundamental insights into the unique nanomechanics of layered bismuth oxychlorides and show guidelines of elastic strain engineering to tailor photoelectric properties of BiOCl and Bi3O4Cl.
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Fei Wang,Xinyan Xiao,Yanfang Yao,Chen Ling
The construction of Z-scheme heterojunction is an effective strategy to improve photocatalytic performance. First principles density functional theory (DFT) calculates that Bi 3 O 4 Cl and MoSe 2 have crossed band structures. In this work, we successfully constructed MoSe 2 /Bi 3 O 4 Cl 2D/3D Z-scheme heterojunction by solvothermal method. Characterization by DRS, EIS and PL shows that MoSe 2 /Bi 3 O 4 Cl has stronger light absorption, better electrochemical properties, and higher carrier separation efficiency, which indicates the successful construction of heterojunctions. The obtained composites were further used to degrade the dye RhB in wastewater with excellent photocatalytic activity. The photocatalytic apparent rate constant of 1.0 % MoSe 2 /Bi 3 O 4 Cl is 7.82 times that of pure Bi 3 O 4 Cl. In addition, the catalyst has good cyclic stability, and the activity does not attenuate significantly after five cycles. Finally, according to the reaction mechanism of Z-scheme heterojunction, a detailed electron transfer path is proposed. This research provides a new inspiration for designing complex catalyst heterojunctions for the treatment of dyes in wastewater.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）