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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
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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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2016
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IF 3.15
Hongqing Gao,Peng Zhang,Junhua Hu,Jimin Pan,Jiajie Fan,Guosheng Shao
One-dimensional Z-scheme TiO 2 /WO 3 /Pt heterostructures were fabricated by integrating a facile electrospinning technique and subsequent annealing in air. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and UV–vis diffuse reflectance spectroscopy, were used to characterize the as-fabricated samples. The results showed that the H 2 -generation of the as-fabricated one-dimensional Z-scheme TiO 2 /WO 3 /Pt heterostructures (S2) was greatly enhanced compared with pure TiO 2 nanofibers (S0) and TiO 2 /WO 3 nanofibers (S1). The enhanced photocatalyst activities were mainly attributed to the solid-state Z-scheme photosynthetic heterojunction system with Pt nanoparticle as an electron collector and WO 3 as a hole collector, leading to effective charge separation on these semiconductors, which were evidenced by electrochemical impedance spectroscopy (EIS) and photocurrent analysis.
研究领域:
材料科学
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能源化学
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光催化
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Junlong Zhang,Jie Wei,Minchuan Xiahou,Zehao Sun,Ao Cao,Youxin Yuanfeng,Yanchun He,Shigeng Song
Novel In 2 S 3 @BiYWO 6 heterojunction photocatalysts were designed and synthesized by a simple two-step hydrothermal method, which exhibit extremely excellent photocatalytic activity for degrading the residual antibiotics in wastewater. Especially, In 2 S 3 @BiYWO 6 composite with mass ratio of 10:1 shows the highest photo-degradation efficiency towards Tetracycline Hydrochloride, which is about 2.46 and 7.55 times than that of pristine In 2 S 3 and BiYWO 6 , respectively. A direct Z-scheme charge transfer mechanism was demonstrated in these heterojunctions through the XPS analysis, radical species trapping experiments and fluorescence detection. Within the framework of this mechanism, the critical built-in electric field ( E i ) formed at the contact interface between In 2 S 3 and BiYWO 6 spatially separates reduction or oxidation sites and thus preserves the photogenerated carriers with stronger redox ability on reaction sites, which ultimately enhances the photocatalytic activity of the heterojunction catalysts. It is commendable that such Z-scheme heterostructures between In 2 S 3 and BiYWO 6 exist in a wide span of component ratios (from 5:1 to 30:1), which is beneficial for the environmental remediation applications. It is believed that this work provides new ideas for design and synthesis of novel Z-scheme heterojunction photocatalysts.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
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IF 3.5
Hanbing Wang,Yunqi Ning,Qi Tang,Xueyang Li,Mengdi Hao,Qun Wei,Tingting Zhao,Daqi Lv,Hongwei Tian
The layered perovskite lanthanum titanate (La2Ti2O7) is a good photocatalytic material owing to its high stability, strong redox ability, and non-toxicity. However, its inherent wide bandgap limits its application in photocatalytic hydrogen evolution. Therefore, combining La2Ti2O7 with two-dimensional (2D) narrow-bandgap semiconductors to form a 2D/2D layered structures is the preferred strategy to improve its photocatalytic performance. In this study, a novel 2D/2D ZnIn2S4/La2Ti2O7 Z-scheme heterojunction was prepared through the solvothermal method. The experimental results show that when the molar ratio of La2Ti2O7 to ZnIn2S4 is 1:4, the hydrogen evolution rate of the composite under ultraviolet-visible light reaches 6.97 mmol·g1·h1, which is 3.5 times higher than that of the pure ZnIn2S4. The results of the morphological characterization of the samples and the photoelectrochemical measurements show that channels for the rapid transfer of carriers are generated by the unique 2D/2D structure of these samples, and the separation and migration efficiency of the photogenerated carriers gets significantly improved due to the formation of the Z-scheme heterojunction. This study provides useful insight into the modulation of wide-bandgap semiconductors and the research on solar energy conversion.
研究领域:
材料科学
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纳米技术
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光催化
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能源转换
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Xuesong Zhao,Yingying You,Shaobin Huang,Yixiao Wu,Yiyang Ma,Guan Zhang,Zhenghua Zhang
Photocatalytic production of hydrogen peroxide from water and oxygen is a promising technique due to the green and sustainable solar-to-chemical energy conversion. However, in the absence of organic sacrificial agents as electron donors, the relatively low photocatalytic H 2 O 2 productivity is still far from satisfactory. Herein, we present a Z‐scheme photocatalytic production of hydrogen peroxide over Bi 4 O 5 Br 2 /g-C 3 N 4 heterostructure under visible light without additive organics. The obtained Bi 4 O 5 Br 2 /g-C 3 N 4 heterostructure exhibited a highest H 2 O 2 production of 124 μM in 60 min by a Z-scheme photocatalytic mechanism. The photoinduced electrons of Bi 4 O 5 Br 2 combine with the holes of g-C 3 N 4 at the contact interface, and the e − and h + of the heterostructure are mainly derived from the conduction band of g-C 3 N 4 and valence band of Bi 4 O 5 Br 2 , respectively. As such, more e − and h + of Bi 4 O 5 Br 2 /g-C 3 N 4 heterostructure are available to reduce oxygen and oxidize water, respectively, with more ·O 2 − and ·OH generated and thus more H 2 O 2 produced.
研究领域:
材料科学
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环境科学
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能源化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2024
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IF 2.7
Yanhua Gao,Hongya Liu,Dongfeng Zhang,Ying Chen,Yuning Liang,Juan Ren
In this paper, M88/BCB Z-scheme heterojunction photocatalysts were synthesized by a one-step hydrothermal method. A series of characterization analyses showed that the introduction of iron-based MOF material M88 with mixed valence (Fe2+/Fe3+) increased not only the specific surface area of BCB, which was 2.2 times higher than that of BiOCl0.1Br0.9 solid solution, but also the existence of Fe2+/Fe3+ redox centers promoting the in situ photoFenton-like reaction, which could generate more ˙O2− and ˙OH. In addition, the introduction of M88 further enhances the visible light response capability of BCB and the separation efficiency of photogenerated carriers. Under visible light for 120 min, 10% M88/BCB can degrade 89.74% of TC, which is 2.1 times and 1.6 times higher than that of M88 and BCB, respectively. A possible photocatalytic degradation mechanism of Z-scheme heterojunctions was proposed based on the study of the band structure and the capture experiment of active species.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2021
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IF 5.909
J.C. Murillo-Sierra,A. Hernández-Ramírez,Zong-Yan Zhao,Angel Martínez-Hernández,M.A. Gracia-Pinilla
Heterogeneous photocatalysis has been considered as a green and sustainable alternative for water decontamination where the key step is the nanomaterials design to enhance the photocatalytic process. Therefore, in this study the photocatalytic degradation of an emerging contaminant as the tetracycline antibiotic in aqueous solution, was investigated under UV–Vis irradiation by using the WO 3 /ZnS photocatalyst. The coupled catalyst was synthesized by hydrothermal method and by varying the WO 3 weight ratio (5, 10 and 20 wt%) with respect to the ZnS. The WO 3 /ZnS photoactivity for tetracycline degradation was greatly enhanced when both semiconductors were coupled to form a highly efficient direct Z-scheme. The highest degradation percentage was reached using the catalyst t WO 3 (5%)/ZnS, which completely degraded the pollutant within 90 min, and the determination of total organic carbon (TOC) removal indicated a high mineralization degree. Photoelectrochemical studies showed that WO 3 (5%)/ZnS exhibited the highest separation of e − / h + pairs and the highest transfer efficiency. The improvement of the electron-hole separation in combination with the band alignment analysis, explained the intrinsic mechanism which corresponded to the direct Z-scheme photocatalytic system.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Ning Shao,Juan Li,Shenglei Che,Jingwu Zheng,Liang Qiao,Yao Ying,Jing Yu,Wangchang Li
The L -band and S-band electromagnetic waves are widely utilized in radar and satellite communications. This paper reports the successful synthesis of 85.8% content Ba 3 Co 2 Fe 24 O 41 (Co 2 Z) at a relatively low temperature of 1150 °C using the solid-phase method with BaFe 12 O 19 (BaM) and Ba 2 Co 2 Fe 12 O 22 (Co 2 Y) as precursors. The Co 2 Z samples were confirmed to have been successfully synthesized using X-ray diffraction (XRD) and thermogravimetry/differential scanning calorimetry (TG-DSC) spectra. Scanning electron microscopy (SEM) images revealed that the sintered samples exhibited large grains (>10 µm). Vibrating-sample magnetometry (VSM) data indicated that the synthesized Co 2 Z samples possessed distinct soft magnetic properties . X-ray photoelectron spectroscopy (XPS) results showed that the Fe 3+ content decreased with the increase in synthesis temperature. The samples synthesized at 1110 °C − 1280 °C had a permeability of 10–20, a cut-off frequency of approximately 1 GHz, and a dielectric constant of 10–30. When the thickness of the sample synthesized at 1150 °C was 3.9 mm, the frequency range of the reflection loss (RL)< −10 dB was 2.55 GHz (0.98–3.53 GHz), with 1.77 GHz as the center frequency, and RLmin was − 57.8 dB. This observation indicates that the effective absorption bandwidth of the samples covers the entire L and S bands, which significantly satisfies practical applications within the military and civilian sectors.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
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IF 3.387
Ziyuan Jiang,Jiaqi Pan,Beibei Wang,Chaorong Li
The two dimensional(2D) Z-scheme AgCl/Ag/Ca/TiO 3 nano-heterojunction is synthesized via simple preparation of hydrothermal-chemical co-deposition method. The results of SEM, EDS, elemental mapping, XRD, TEM, XPS and Raman shift imply that the AgCl/Ag nanoparticles have deposited on the surfaces of CaTiO 3 nanosheets successfully. Compared with the unmodified samples, the photocatalytic activity of the as-prepared 2D AgCl/Ag/CaTiO 3 nano-heterojunction exhibits a remarkable enhancement by the hydrogen production. Further, the photocatalytic process has been studied and the mechanism of the photocatalytic hydrogen production enhancement has been provided, which could be ascribed to the Z-scheme heterojunction and 2D lamellar structure of the CaTiO 3 .
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
RSC Advances
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2020
·Vol. 10
·期 44
·26246-26255
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IF 3.119
Zhu Ding,Shuo Wang,Xue Chang,Dan-Hong Wang,Tianhao Zhang
Photocatalytic nitrogen fixation has attracted extensive attention in recent years. Studies have shown that catalytic materials with O, N and other defects can effectively reduce the bond energy of NN triple bond when N2 is adsorbed on the defects. As an outstanding non-metallic catalyst, g-C3N4 has been widely studied in the field of photocatalytic catalysis, and the nitrogen-defected C3N4 shows promoted photocatalytic activity. Herein, nano-size MOF-74 particles (<20 nm) was dispersed on nitrogen-defected C3N4 thin film (∼4 nm) via a simple sol–gel method. The combination of Nano-MOF and defected film C3N4 could effectively improve the photocatalytic activity of nitrogen fixation through Z-scheme mechanism compared with pure defected film C3N4.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Liangdi Zhu,Yuxing Zhou,Lingyun Fei,Xunlong Cheng,Xixi Zhu,Lanqing Deng,Xin Ma
CuO/Fe 3 O 4 /GO, as a Z-scheme heterojunction catalyst, was successfully synthesized and used as a photocatalyst for removing tetracycline from aqueous solution. The CuO/Fe 3 O 4 /GO heterogeneous catalyst combines the narrow bandgap semiconductor CuO, oxygen vacancies of Fe 3 O 4 , and oxygen-containing reaction sites of GO. Without the addition of activators (persulfate or H 2 O 2 ), the photocatalytic performance on decomposing tetracycline is very excellent. Compared with GO, Fe 3 O 4 , and CuO, CuO/Fe 3 O 4 /GO exhibits superior photocatalytic performance. Under visible light radiation , CuO/Fe 3 O 4 /GO generates h + and ⋅O 2 − , which are the mainly responsible active groups for TC degradation . The effects of various pH, catalysts, and reuse on the degradation performance are evaluated, and the optimal conditions for CuO/Fe 3 O 4 /GO removal of tetracycline are obtained at pH 7, catalyst dosage 20 mg⋅L −1 , TC at a concentration of 30 mg/L, nearly 97.3% of tetracycline is decomposed. This study has great potential in the treatment of wastewater containing various antibiotics.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
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