JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Fanwei Meng,Chao Qu,Lanyang Wang,Decai Yang,Zezhong Zhao,Qing Ye
Photocatalytic CO 2 reduction technology plays a significant role in the energy and environmental sectors, highlighting the necessity for developing high-efficiency and stable catalysts. In this study, a novel photocatalyst, x NiCo 2 O 4 /CN ( x = 1, 3, and 5 wt%), was synthesized by depositing zeolitic imidazolate framework-67 (ZIF-67)-derived nickel cobaltate (NiCo 2 O 4 ) hollow nanocages onto porous graphitic carbon nitride ( g -C 3 N 4 , CN) nanosheets for photocatalytic CO 2 reduction. Under visible light irradiation, the resulting 3NiCo 2 O 4 /CN photocatalyst demonstrated exceptional CO yields of up to 2879.5 μmol g −1 h −1 , surpassing those of NiCo 2 O 4 and CN alone by factors of 3.3 and 11.6, respectively. The introduction of hollow NiCo 2 O 4 nanocages increased the specific surface area of the material and enhanced the number of active sites, while strengthening visible light absorption. The creation of a built-in electric field, induced by the Fermi level difference between the two materials, was confirmed through ultraviolet photoelectron spectroscopy (UPS) characterization. This resulted in the formation of a Z-scheme heterojunction, significantly enhancing the separation and migration of photogenerated charge carriers. Notably, 3NiCo 2 O 4 /CN exhibits excellent stability during long-term photocatalytic reactions, ensuring reliable performance for practical applications. This study offers novel insights and methodologies for developing efficient photocatalytic CO 2 reduction catalysts.
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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DOI
PubMed
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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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 42
·期 1
·489-496
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IF 3.269
Zengyu You,Qianhong Shen,Yuxuan Su,Yang Yu,Hui Wang,Tian Qin,Fang Zhang,Di Cheng,Hui Yang
A novel Z-scheme core–shell g-C3N4/MCNTs/BiOI heterojunction was successfully designed and fabricated through filling multi-walled carbon nanotubes (MCNTs) with g-C3N4, followed by the loading of BiOI on the outer surface of the MCNTs. The structure–property relationship was analyzed by X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra (DRS), photoluminescence spectra (PL), ESR probe tests and reactive species trapping measurements. The results show that the BiOI nanoparticles are uniformly loaded on the surface of the MCNTs which are fully filled by g-C3N4. The MCNTs connect the two semiconductors of g-C3N4 and BiOI, and serve as electron mediating conductors to promote the transfer of the photo-generated electrons, thereby constructing a Z-scheme heterojunction between g-C3N4 and BiOI. With this unique structure, enhanced visible-light photocatalytic activities are achieved because of the synergistic effect of light harvesting and improved separation efficiency of photo-generated carriers.
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
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Xiaoya Gao,Guangbei Tang,Wen Peng,Qian Guo,Yongming Luo
Phosphate modification is a general strategy for improving the photocatalytic activities of semiconductors. Ion exchange can be occurred during the phosphate modification process. This would give a surprise for a new phase formed on the surface of the parent photocatalyst. More importantly, this is conductive to form close contact and continuous interface favoring the charge transfer between two phases. Here, a novel BiOCl-OV-BiPO 4 photocatalyst was fabricated using a facile in situ phosphate modification method. BiOCl-OV-BiPO 4 displayed a maximum carbamazepine (CBZ) degradation efficiency of 81.70% after 30 min Xe lamp irradiation, with a reaction kinetics rate constant ( k ) of 5.75 times higher than ordinary BiOCl samples. Oxygen vacancy (OV) is important for the construction of Z-scheme BiOCl-OV-BiPO 4 : OV benefits the generation of BiPO 4 on the surface of BiOCl; furthermore, OV acting as electron mediator, promotes the separation of photogenerated charge carriers between BiOCl and BiPO 4. Based on the results from PL tests, photocurrent density, EIS Nyquist plots, and cyclic voltammetry, it can be demonstrated that Z-scheme structure of BiOCl-OV-BiPO 4 not only increases the photogenerated electrons-holes separation rate but also retains their strong redox ability. This significantly facilitates the production of superoxide radical (O 2 − ) and holes ( h + ), which dominates the CBZ photodegradation. This work provides a new sight for the fabrication of Z-scheme photocatalysts to improve the photocatalytic performance.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Beibei Wang,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
We report an unique 2D/2D Iodine doped BiOIO 3 /g-C 3 N 4 heterojunction was successfully prepared. The iodine doped BiOIO 3 was prepared by a simple solvent exchange method and combined with g-C 3 N 4 by solvothermal method . The prepared photocatalyst has potential application value in the future due to its excellent stable cycle property. BiOIO 3 nanoplates and g-C 3 N 4 nanosheets form a close interfacial contact directly, so the catalyst has higher charge transport efficiency and wide visible range due to the introduction of iodide ions. Synergistic heterojunction exhibits strong photocatalytic activity for degradation of NO at ppb-level under visible light , of which 30% Iodine doped BiOIO 3 /g-C 3 N 4 can achieve a maximum removal rate of 57% for NO. According to the experimental results of ESR and other experiments, a more complex Z-scheme photocatalytic mechanism is proposed, which has stronger redox ability than the traditional mechanism.
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
Nanoscale Research Letters
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2018
·Vol. 13
·期 1
·1-8
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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
APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
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IF 8.328
Yanyang Shang,Xi Chen,Wenwen Liu,Pengfei Tan,Haoyun Chen,Laidi Wu,Cheng Ma,Xiang Xiong,Jun Pan
A facile microemulsion-assisted co-precipitation method was carried out to synthesize nano-sized Ag 2 CrO 4 highly dispersed on the surface of porous g-C 3 N 4 as high-efficiency visible-light-driven composite photocatalysts for the first time. The structure and morphology of the composites were systematically characterized by various techniques. Compared with Ag 2 CrO 4 and g-C 3 N 4 , g-C 3 N 4 /Ag 2 CrO 4 composites showed a dramatically increased photocatalytic activity in degradation of rhodamine B (RhB) and methylene blue (MB). The optimum mass ratio of the Ag 2 CrO 4 to g-C 3 N 4 was about 30 wt%, the degradation rate of which were 6.1 (7.9) and 9.7 (15.2) times higher than pure Ag 2 CrO 4 and g-C 3 N 4 in RhB (MB) degradation, respectively. The excellent photocatalytic activity and stability mainly benefited from the synergistic effect including smaller Ag 2 CrO 4 particle size, high specific surface area of the composites and matched band potentials which not only promoted the separation of photon-generated charge carriers, but also inhibited the photocorrosion of Ag 2 CrO 4 . Further study revealed that the photocatalytic mechanism followed a Z-scheme which provided an efficient transfer pathway for charge carriers meanwhile endowed the composites with strong oxidation and reduction ability. Hence the porous g-C 3 N 4 /Ag 2 CrO 4 composites are potential in environmental purification.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
ACS Catalysis
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2018
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IF 11.384
Chunwei Dong,Siyu Lu,Shiyu Yao,Rui Ge,Zidong Wang,Ze Wang,Pengfei An,Yi Liu,Bai Yang,Hao Zhang
Recently, ultrathin 2D photocatalysts have attracted people’s attention due to their performances in the area of solar energy conversion. However, the synthesis of ultrathin 2D photocatalysts with a nonlayered crystal structure is still full of challenges. Herein, ultrathin 2D BiVO4 nanosheets (NSs) with monoclinic crystal structure are synthesized through a convenient colloidal two-phase method. The as-prepared BiVO4 NSs possess a thickness of less than 3 nm but a diameter larger than 1.2 μm. Furthermore, the presence of HNO3 facilitates the growth of BiVO4 NSs with nearly naked surfaces, largely exposed {010} planes, and widely distributed oxygen vacancies (VO) inside the crystalline structure, which are of great benefit to their photocatalytic activity under visible light irradiation. As a result, our ultrathin 2D BiVO4 NSs exhibit an impressive photocatalytic performance for water oxidation. The O2 evolution rate is 107.4 μmol h–1, and the apparent quantum yield (AQY) is as high as 26.1% (420 nm). Furthermore, by employing our ultrathin 2D BiVO4 NSs as the O2-evolving photocatalyst, Ru-SrTiO3:Rh and Fe3+/Fe2+ as the H2-evolving photocatalyst, and the redox mediator, respectively, a Z-scheme overall water splitting system is successfully constructed. Under visible light irradiation, our Z-scheme photocatalytic system presents high H2 and O2 evolution rates (16.7 and 8.0 μmol h–1) with an AQY of 1.88% (420 nm) and good photocatalytic stability.
研究领域:
材料科学
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光催化技术
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能源转换
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DOI
高影响因子
Catalysis Science & Technology
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2021
·Vol. 11
·期 18
·6271-6280
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IF 6.119
Jiaqi Dong,Jianqiang Hu,Anyu Liu,Jiale He,Qingling Huang,Yanru Zeng,Wenjing Gao,Zhen Yang,Yongcai Zhang,Yong Zhou,Zhigang Zou
Direct Z-scheme MgIn2S4/Bi2WO6 hierarchical heterostructures were simply fabricated via immobilising MgIn2S4 nanoflakes onto the surface of Bi2WO6 hierarchical nanosheet-like structures towards photocatalytic reduction of Cr(VI). The analyses of the energy band structure, UPS tests and DMPO-ESR spin-trap experiments confirm that the intimate MgIn2S4/Bi2WO6 heterointerface allows an efficient Z-scheme interfacial charge migration route between MgIn2S4 and Bi2WO6, leading to higher redox ability of photoexcited carriers, and thus favours the separation of photoexcited carriers, proved by the results of PL spectroscopy, photoluminescence decay traces, transient photocurrent densities and EIS. In addition, the MgIn2S4/Bi2WO6 heterostructures also exhibit obviously enhanced ultraviolet-visible-light absorption according to UV-vis DRS analysis, and can generate more electron–hole pairs under UV-visible light illumination, effectively improving the photocatalytic activity. Therefore, because of their synergistic effects, all the MgIn2S4/Bi2WO6 hierarchical heterostructures show distinctly improved photoreduction activities for Cr(VI), compared with pure Bi2WO6. The optimal hybrid (MIS/BWO-0.35) displays nearly 100% Cr(VI) reduction into Cr(III) after 40 min of simulated sunlight illumination, which is better than the majority of the reported Bi2WO6 and other semiconductor photocatalysts before. Its reaction rate constant for the photoreduction of Cr(VI) (0.1063 min−1) is about 4.5 times higher than that of the pristine Bi2WO6 (0.0237 min−1). This work provides a valid approach for developing efficient Z-scheme photocatalytic materials in removing Cr(VI).
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Ruijie Chen,Haotian Yin,Lei Wang,Zhiqiang Zhang,Jing Ding,Jinfeng Zhang,Hui Wan,Guofeng Guan
The reduction of CO 2 achieved by photocatalysis can simultaneously alleviate the energy crisis and solve environmental issues. Nevertheless, it remains challenging for the rational design of photocatalysts with high-efficiency carrier migration ability. Herein, the Z-scheme g-C 3 N 4 /In 2 O 3 (CN/INO) heterostructure was fabricated via metal–organic frameworks (MOFs) assisted thermal deposition which could form a fully encapsulated hollow tubular structure. The unique structure was based on the MOFs-derived hollow hexagonal In 2 O 3 tubular integrated with ultrathin g-C 3 N 4 . The Z-scheme CN/INO heterojunction exhibited a larger specific surface area and excellent charge separation efficiency. Benefiting from the above features, the Z-scheme CN/INO heterojunction demonstrated superior performance on photocatalytic CO 2 reduction. The formation of CO and CH 3 OH over the optimized CN/INO-2 catalyst was 7.94 and 1.44 µmol⋅g −1 ⋅h −1 , respectively. Moreover, the density functional theory (DFT) calculations and Kelvin probe force microscopy (KPFM) was carried out to further investigate the situation of charge transfer on the interface of CN/INO. The in-situ Fourier transform infrared spectroscopy (FTIR) was measured to confirm the immediate products and the possible mechanism of photocatalytic CO 2 reduction was proposed. This work provided a MOFs-assisted strategy to construct a Z-scheme system for photocatalytic CO 2 reduction.
研究领域:
材料科学
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环境科学
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化学
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PubMed
高影响因子
Electronic Materials Letters
·
2022
·Vol. 19
·期 1
·94-107
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IF 3.151
Luo Menghao,Feng Hange,Hu Yuechuan,Chen Keke,Dong Zibo,Xue Shaolin
Abstract Photocatalytic degradation has received considerable emphasis since it shows significant possibilities in environmental pollution. In this work, ternary Z-scheme heterojunction g-C 3 N 4 /TiO 2 /Ti 3 C 2 photocatalysts are designed and fabricated. The Z-scheme heterojunctions formed on the surfaces of g-C 3 N 4 and TiO 2 dramatically modify the photocatalytic performances of the compound under illumination. Meanwhile, in this process, multilayer Ti 3 C 2 , as the transport medium of Z-scheme heterojunction, is tightly bonded to TiO 2 generated by hydrothermal oxidation and g-C 3 N 4 with large specific surface area, which effectively facilitates the space charge separation and depresses the charge recombination. When the addition amount of TiO 2 /Ti 3 C 2 is 80 mg and calcined at 450 ℃ for 4 h, g-C 3 N 4 /TiO 2 /Ti 3 C 2 has the greatest photocatalytic performance, and the kinetic constant for degradation methyl orange (MO) was about 3.62 times that of g-C 3 N 4 and 14.55 times that of Ti 3 C 2 , respectively. This work illustrates that g-C 3 N 4 /TiO 2 /Ti 3 C 2 has outstanding potential and offers novel insights for designing and synthesizing new ternary heterojunction materials. Graphical Abstract
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
LANGMUIR
·
2023
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IF 3.9
Ruixin Song,Shifei Kang,Liangtao Yao,Lulu Zheng,Dechao Yu,Dawei Zhang
BiVO4 has been widely used in the field of photocatalysis due to its nontoxic and moderate band gap. However, single BiVO4 has the disadvantages of a high recombination rate of photogenerated carriers and weak response to visible light, inhibiting its photocatalytic applications. To explore viable solutions, a hybrid material composed of lanthanum-doped bismuth vanadate (La-BiVO4) and oxygen-doped porous graphite carbon nitride (O-doped g-C3N4), i.e., La-BiVO4/O-doped g-C3N4 powder, was prepared by a facile hydrothermal reaction and low-temperature calcination. Then, the powder was loaded on polyacrylonitrile nanofibers (NFs) through the electrospinning fiber technique. Various surface science characterizations, including transmission electron microscopy and nitrogen absorption and desorption analysis, confirmed the successful synthesis of a mesoporous heterojunction material. The La3+-doping as well as the porous morphologies and larger specific surface area of the O-doped g-C3N4 ultimately improve the photocatalytic abilities via a proposed Z-scheme heterojunction mechanism. The roles of La3+-doping and morphology modification in promoting the separation of the photogenerated carriers and broadening the optical absorption range were experimentally discussed. The RhB degradation experiment indicated that the La-BiVO4/O-doped g-C3N4 powder has excellent photocatalytic activity, which is about 2.85 and 2 times higher than that of the pure BiVO4 and O-doped g-C3N4, respectively. Meanwhile, the La-BiVO4/O-doped g-C3N4 NF shows good stability and recoverability after a 10-cycle testing. Such a hybrid photocatalyst with a proposed Z-scheme heterojunction mechanism and good plasticity might pave a feasible way to fabricate a new library of photocatalysts.
研究领域:
材料科学
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环境科学
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PubMed
高影响因子
危险品化学品经营许可证（带存储）