JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 20
·16077-16098
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IF 2.779
Chen Keke,Feng Hange,Li Lingwei,Luo Menghao,Xue Shaolin,Sang Jingxin
The excellent photoresponse of semiconductors enables them as a promising photocatalyst for photocatalytic degradation of organic pollutants and antibiotics, but their practical applications are limited by photogenerated carrier recombination, instability, and fixed energy band positions. Herein, we designed and synthesized a dual Z-scheme flower-like spherical Ag 3 PO 4 /MoS 2 /g-C 3 N 4 (AMN) photocatalyst loaded with different mass of g-C 3 N 4 (3, 5 and 7 mg). Under visible light irradiation, MoS 2 enhanced the light absorption range of AMN composite. The holes concentrated in the valence band of Ag 3 PO 4 provide strong oxidation capacity, and the electrons retained in conduction band of g-C 3 N 4 provide strong reduction ability in the photocatalytic system. It is helpful to improve the separation efficiency of photogenerated carriers and enhance the photocatalytic activity of AMN composite. The AMN photocatalyst loaded with 5 mg g-C 3 N 4 (AMN-5) has the optimal photocatalytic activity. The photocatalytic degradation efficiency of the photocatalyst for methylene blue (MB) within 24 min is 3.98, 1.85, and 1.17 times that of g-C 3 N 4 , Ag 3 PO 4 , and Ag 3 PO 4 /MoS 2 , respectively. After three cycles, the degradation efficiency of AMN-5 for MB decreased from 99.44% to 90%, about 3.79 times of Ag 3 PO 4 (23.77%). In addition, the optimal AMN-5 photocatalyst also has excellent photocatalytic degradation efficiency for Rhodamine B (RhB) and tetracycline (TC). This design and concept provide a promising insight for the photocatalytic degradation of pollutants.
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
JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Li Jia,Shi Quanquan,Ha Lin,Sun Yanxin,Shi Huiming
Rational development of innovative photocatalysts with efficient interfacial separation and stronger oxidation–reduction ability of photo-generated carrier is critical for environmental antibiotic purification. In this work, a novel dual Z-scheme heterojunction nanocomposites were fabricated based on the in-situ growth of CuBi 2 O 4 nanoparticles onto the surface of TiO 2 nanorods and Bi 2 O 2 CO 3 nanosheets via a facile one-step hydrothermal method. Ternary TiO 2 /CuBi 2 O 4 /Bi 2 O 2 CO 3 (TCB) composites showed enhanced photocatalytic removal of tetracycline (TC), which is greater than pure Bi 2 O 2 CO 3 , CuBi 2 O 4 , TiO 2 and binary composites. The TCB-20 composite exhibited the best photo-degradation efficiency of TC (82% at 60 min) and maintained a higher stability after four consecutive cycles. Additionally, a dual Z-scheme photocatalytic mechanism with highly efficient and fast electron transfer was proposed, which prominently improves the photocatalytic performance. This work reports an integrated structure of a dual Z-scheme heterojunction that plays an important role in the degradation of tetracycline. Graphical abstract
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
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Xiaohua Zheng,Chenbin Cai,Shihui Lu,Mengnan Xu,Wei Chen,Fanger Yang
Recently, the photocatalytic degradation of organic pollutants has gained increasing attention because of its high efficiency and lack of secondary pollution; however, problems such as rapid electron–hole recombination affect its degradation efficiency. In this study, a novel dual Z-scheme g-C 3 N 4 /Ag 2 MoO 4 /AgBr heterojunction was successfully prepared using a one-step room-temperature precipitation method, with its photocatalytic activity evaluated by degrading rhodamine B (RhB) and tetracycline hydrochloride (TCH). The composition and surface morphology of the ternary catalysts—characterized using X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Brunauer–Emmett–Teller (BET) tests, and X-ray photoelectron spectroscopy (XPS)—confirmed the successful loading of Ag 2 MoO 4 and AgBr onto g-C 3 N 4 . Catalytic degradation results showed that the ternary catalyst exhibited the best performance at a 40 % mass fraction of AgBr. Moreover, the ultraviolet–visible diffuse reflectance spectra (UV–Vis DRS), photoluminescence (PL), electrochemical impedance spectroscopy (EIS), and transient photocurrent response test results show that the ternary catalyst has excellent optical properties. In addition, the significant improvement in the catalytic performance can be attributed to the effective charge separation of the dual Z-scheme photocatalytic mechanism based on radical trapping experiments, electron spin resonance (ESR) analysis, and energy band analysis. Hence, this study provides a new approach to studying more efficient photocatalysts.
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
APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Yingying Jiao,Yike Li,Jianshe Wang,Zhanhang He,Zhongjun Li
Photocatalyst with double Z-scheme mechanism can promote the separation and transmission of photo-induced carriers effectively. In this work, a novel C 3 N 4 nanotube (CNT)/N-doped carbon dots (NCDs)/Ni 2 P composite photocatalyst was prepared by decorating NCDs and Ni 2 P nanoparticles on CNT, respectively. A variety of test results, including photoluminescence spectra (PL), electrochemical impedance spectrum (EIS) and transient photocurrent responses (TPR), show that compared with CNT and CNT/Ni 2 P, CNT/NCDs/Ni 2 P composite can dramatically facilitate the separation and transmission of charge. Impressively, the CNT/NCDs/Ni 2 P composite achieves a hydrogen evolution rate of 627.2 µmol g -1 h −1 which is well above that of CNT and CNT/Ni 2 P, respectively (no detection and 48.5 μmol g -1 h −1 ). Combining the above characterization results with energy band calculation, we speculate that the remarkably optimized photocatalytic activity was predominantly ascribed to the double Z-scheme charge transfer mechanism for CNT/NCDs/Ni 2 P nanocomposite. This work provides a new member for family of photocatalysts with double Z-scheme mechanism, which is beneficial to further fundamental and applied research.
研究领域:
材料科学
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能源化学
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光催化
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Ting Sun,Ping Gao,Yuqing He,Zhiren Wu,Jun Liu,Xinshan Rong
The development of an efficient catalyst that can use solar energy for NH 3 production is of great significance in solving the environmental and energy crisis caused by the traditional ammonia synthesis process. In this work, a dual Z-scheme tubular carbon nitride/zinc sulfide/zinc indium sulfide ternary composited photocatalyst (TCN/ZnS/ZnIn 2 S 4 ) with excellent nitrogen photofixation performance under visible light was prepared by self-assembly and hydrothermal methods . The crystal structure studies confirmed that tubular carbon nitride (TCN) had more active sites that could promote N 2 adsorption. The photochemical studies proved that the double charge transfer channel provided by the dual Z-scheme heterojunction could improve the efficiency of electron-hole separation and achieve excellent photocatalytic nitrogen fixation . The ammonia production rate of the TCN/ZnS/ZnIn 2 S 4 catalyst was up to 136.56 μmol/L, and it also has good stability and reusability. This work provides new insight into the development of Z-scheme heterojunction photocatalysts with green and efficient nitrogen fixation.
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
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiabao Gu,Chaogang Ban,Jiazhi Meng,Qianwen Li,Xuanyu Long,Xiaohan Zhou,Nan Liu,Zequan Li
Rapid recombination of the photogenerated carrier, a limited range of photoexcitation, and unsatisfactory photocatalytic activity are the limiting factors in photocatalytic applications. Accelerating photogenerated carrier transfer and constructing surface active sites have become critical tasks. In this study, a dual Z-scheme UNiMOF/BiVO 4 /S-C 3 N 4 (NBSCN) photocatalyst with a 2D/3D/2D structure was successfully constructed. Under visible-light irradiation, NBSCN outperforms single and binary composites in photocatalytic tetracycline photodegradation and Cr(VI) photoreduction due to the synergistic effect of adsorption and photocatalysis. The maximum photocatalytic efficiency of tetracycline (90.1 %) and Cr(VI) (93.6 %) in 120 min was achieved by NBSCN-20 %. The exceptional photocatalytic activity of NBSCN-20 % can be attributed to the large specific surface area, increased active sites, improved visible-light absorption ranges, and the construction of heterojunctions. The fabricated dual Z-scheme heterojunction at the interface of NBSCN reduces the recombination rate of photogenerated carriers and widens the range of light absorption. NBSCN-20 % exhibits excellent stability in the process of cyclic experiments. On the basis of the results, the feasibility of the dual Z-scheme mechanism is proposed. This work demonstrates that NBSCN-20 % photocatalyst has promising application prospects in removing heavy-metal ions and organic pollutants from aqueous environments.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Pengfei Zhu,Shasha Zhang,Mei Liu,Ming Duan,Zhaoxin Huang,Han Lu
Herein, a novel Bi 2 WO 6 /AgBr/Ag 4 V 2 O 7 double Z-scheme heterojunction photocatalytic material was synthesized by the ultrasonic-assisted coprecipitation method. When the content of AgBr in Bi 2 WO 6 /AgBr/Ag 4 V 2 O 7 is 30 wt% and the content of Ag 4 V 2 O 7 is 1 wt%, under the optimized reaction conditions, the degradation rate of Bi 2 WO 6 /AgBr/Ag 4 V 2 O 7 to oxytetracycline (OTC) reached 88.13 % within 60 min, and the photocatalytic activity decreased only slightly after repeated use for three times, other than that, the toxicity of OTC to wheat decreased significantly after degradation. The morphology, composition, crystal structure and visible light absorption capacity of the samples are investigated by a series of characterization techniques. Furthermore, free radical capture experiment, electron paramagnetic resonance (EPR) experiment and liquid chromatography-mass spectrometry (LC-MS) were used to explore the possible photocatalytic mechanism and degradation path of OTC. The results show that the improvement of photocatalytic activity is attributed to the construction of a double Z-scheme heterojunction, which provides a more effective structural space for the separation of photogenerated e - -h + pairs. This study provides a new idea for the separation of photogenerated e - -h + pairs and broadens the response range of visible light, and proposes a new strategy for the environmental treatment of photocatalysts.
研究领域:
环境科学
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材料科学
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生物学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Ting Liang,Jingwen Wei,Shiming Zhang,Jinhang Yang,Jiangli Sun,Zuji Li,Zhihong Li,Zebin Yu,Shuangfei Wang,Yanping Hou
Design of photocatalysts with high-efficiency for sunlight utilization is one of the prerequisites for CO 2 photoreduction . Besides, modulating a stable electron-donating environment to meet the energy barrier for CO 2 reduction to CO is crucial. In this work, the ZnSe/Ag 2 Se/AgBr (ZAA) heterojunction was fabricated by growing the ZnSe on the AgBr surface accompanied by in-situ generation of Ag 2 Se between the two components by hydrothermal process. Results showed that the ZAA exhibited excellent light response ability over the full wavelength range. X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) demonstrated that the charge transfer of the ZAA conformed to dual Z-scheme mechanism, with the Ag 2 Se acting as an electron transfer bridge, which in turn acted as an electron reservoir to accelerate electron transfer, facilitating carriers’ separation. The highest CO yield of 54.14 µmol/g/h was obtained from the optimal ZAA-2, which was 11.76 and 10.44 times of pure ZnSe and Ag 2 Se, respectively. This work demonstrated the feasibility of a dual Z-scheme heterostructure with full spectrum response for offering stable electron-donating environment and improving electron transfer for enhanced photocatalytic activity.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Qi Wang,Ningyi Li,Meng Tan,Man Deng,Guoxiang Yang,Qiang Li,Hao Du
Photocatalysis is an emerging technique for the remediation of refractory organic contaminants. Herein, a novel dual Z-scheme Bi/BiOI-Bi 2 O 3 -C 3 N 4 heterojunctions were constructed through a calcining process following with I − etching and UV-reduction processes. Various analytical technologies were adopted to characterize the materials. As a result, the Bi 0 decorated composite presented improved visible-light-response and rapid charge transfer. Due to the synergy of Bi 0 and dual Z-scheme heterostructures, a remarkable photocatalytic performance toward phenol degradation was achieved with the highest degradation efficiency of 93.2% and rate constant of 0.0161 min −1 over the optimal composite within 75 min of visible light irradiation. Interestingly, the concentration of the yielded benzoquinone considerably decreased with the introduction of C 3 N 4 . Trapping experiments and electron spin resonance (ESR) tests indicated that h + , O 2 − , OH and e − contributed to phenol remediation, and h + and O 2 − were the crucial species toward phenol degradation. Furthermore, outstanding stability was obtained only with a decline of 3.8% after 4 cycles. A reasonable charge transfer mechanism was also proposed. This work provides a new route for in situ construction of Bi 0 decorated dual Z-scheme heterojunction for phenolic compounds degradation.
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
Catalysts
·
2025
·Vol. 15
·期 1
·69
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IF 4
Yuning Liang,Baohui Wang,Tao Cheng,Mingchun Bi,Weimeng Chi,Yuxi Liu,Wenjing Zhang,Yuxuan Liu
A novel dual Z-scheme heterojunction photocatalyst was constructed by introducing the narrow-bandgap semiconductor CuInS2(CIS) into the dual metal-organic framework (MOF) system of UiO-66(Zr) and NH2-MIL-101(Fe). This structure effectively overcomes the limitations of conventional photocatalysts in terms of light absorption range and the separation efficiency of photogenerated charge carriers. The prepared ternary catalyst, (UiO-66(Zr))-(NH2-MIL-101(Fe))/CuInS2, exhibited excellent photocatalytic performance under visible light irradiation, achieving a hydrogen production rate of 888 μmol g−1h−1and a methylene blue (MB) degradation efficiency of up to 95.03%. The significant enhancement in performance is attributed to the material’s porous structure, extended light absorption range, and optimized electron transfer pathways. Additionally, the construction of the dual Z-scheme heterojunction further promotes the separation and migration of photogenerated charge carriers, suppressing electron–hole recombination. This study demonstrates the great potential of dual Z-scheme heterojunctions in improving photocatalytic efficiency and provides an important theoretical foundation and design strategy for the development of efficient photocatalysts.
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
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Zhaoyang Li,Yongjie Zhao,Qing Guan,Qian Liu,Sara Khan,Leilei Zhang,Xianze Wang,Lei Chen,Xia Yang,Mingxin Huo
Photocatalytic reduction of nitrate has attracted much attention recently, however, low efficiency and difficult separation have limited its application in practice. In this study, the novel direct dual Z-scheme AgBr(Ag)/MIL-101(Cr)/CuFe 2 O 4 (AB/M/CFO) was fabricated by the hydrothermal technology combined with the photodeposition method for the first time. The AB/M/CFO exhibited the highest nitrate conversion and nitrogen selectivity (79.9% and 94.5%, respectively) compared to AgBr(Ag)/MIL-101(Cr), MIL-101(Cr) and CuFe 2 O 4 for 30 min UV-light irradiation. The dual Z-scheme of AB/M/CFO enhanced electron transfer and charge separation, which was proved by transient photocurrent responses, leading to a significant improvement in photocatalytic efficiency. Meanwhile, after four cycles, the AB/M/CFO photocatalyst also displayed a strong magnetic separation ability and excellent recycling stability. Furthermore, the excitation and electron transfer process over dual Z-scheme AB/M/CFO photocatalytic material were proposed, based on the radical trapping experiments. Our work provides a new strategy to construct dual Z-scheme MOFs-based materials that have promising applications in photocatalytic reduction of pollutants.
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
Environmental Science and Ecotechnology
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2023
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IF 12.6
Jing-Yan Zhang,Jie Ding,Lu-Ming Liu,Rui Wu,Lan Ding,Jun-Qiu Jiang,Ji-Wei Pang,Yan Li,Nan-Qi Ren,Shan-Shan Yang
Sulfamethoxazole (SMX) is a significant environmental concern due to its adverse effects and ecological risks. SMX elimination in aquatic environments via photocatalysis presents a viable solution, given its high oxidation potential. However, such a solution remains controversial, primarily due to a lack of selectivity. Here we introduce a molecularly imprinted TiO 2 @Fe 2 O 3 @g-C 3 N 4 (MFTC) photocatalyst designed for the selective degradation of SMX. To assess MFTC's selectivity, we applied it to degrade synthetic wastewater containing SMX alongside interfering species sulfadiazine (SDZ), ibuprofen (IBU), and bisphenol A (BPA). The results demonstrated a selective degradation efficiency rate of 96.8%, nearly twice that of competing pollutants. The molecularly imprinted sites within the catalyst played a crucial role by selectively capturing SMX and enhancing its adsorption, thereby improving catalytic efficiency. The degradation process involved •OH and •O 2 − free radicals, with a newly proposed double Z-scheme mechanism and potential pathway for SMX degradation by the MFTC photocatalytic system. This study enriches the application of photocatalysis using molecularly imprinted nanocomposite materials for treating complex pollutant mixtures in water.
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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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）