APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jun Chen,Siyi Zhang,Yifei Xu,Jianning Cai,Yang Yang,Xin Wang,Chaoyue Chen,Jiamin Wei,Lianshe Fu,Tinghai Yang
The construction of visible-light catalysts to degrade water pollutants is significant in environmental governance and solar energy conversion. In this work, a novel Zn-MOF with unsaturated coordination sites was constructed using 1-(Carboxymethyl)-pyrazole-4-carboxylic acid as the organic ligand. Its crystal structure was studied through single crystal X-ray diffraction. To enhance visible light catalytic performance, ZnFe-MOF/AgCl-x Z-scheme heterojunction composites were constructed. The optimized ZnFe-MOF/AgCl-50 material exhibits excellent photocatalytic performance, which can degrade 90.33 % of levofloxacin in 21 min. The results indicate that Fe doping and the construction of the ZnFe-MOF/AgCl-x Z-scheme heterojunction not only broaden the responsive range to visible light, but also effectively promote the internal and interfacial charges transfer efficiency, leading to a superior catalytic performance. In addition, the Ag nanoparticles (NPs) generated during the photocatalytic process can serve as a bridge, achieving rapid charge transfer in Z-scheme heterojunction. This work can offer an innovative perspective for the development of novel and efficient MOF-based Z-scheme heterojunction photocatalysts for wastewater treatment applications.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Kuan Wang,Tong-Le Dang,Sheng-Li Lv,Xin-Peng Li,Kai-Xiong Dai,Zhen-Hong He,Weitao Wang,Huan Wang,Zhao-Tie Liu
The photo-thermo synergy catalytic cyclohexane oxidation has been identified as an efficient and environmentally friendly approach for the preparation of cyclohexanone and cyclohexanol (KA oil). However, this strategy encountered several challenges that impeded its implementation for the one-step production of adipic acid (AA), highlighting the need for further advancements. Herein, a robust strategy for tailoring multi-channel charge transfer pathways in LaVO 4 /WO 3 @H x V 2 O 5 nanospherical composites was developed by constructing double Z-scheme heterojunctions. The LaVO 4 /WO 3 @H x V 2 O 5 exhibited exceptional photothermal catalytic performance for the cyclohexane oxidation, achieving the cyclohexane conversion of 11.01 % with the total selectivity of 96.38 % (solid product AA of 58.51 % and liquid product KA oil of 37.87 %). The exceptional performance of LaVO 4 /WO 3 @H x V 2 O 5 can be ascribed to the double Z-scheme heterojunctions with multi-channel charge transfer and high redox potentials, which facilitates the efficient separation and transfer of photo-generated electron-hole pairs. This deliberate design of double Z-scheme heterojunctions provides valuable insights into the meticulous construction of efficient pathways with multi-channel charge transfer for the field of photothermal catalysis applications.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Fei Liu,Thien-Phap Nguyen,Qin Wang,Florian Massuyeau,Yi Dan,Long Jiang
Constructing a conductive interface is crucial for the transfer of photoexcited charges in the photocatalytic heterojunction system. In this study, we introduced Ag into g-C 3 N 4 /P3HT system to construct a conductive interface which benefits for transfer of photoexcited charges between g-C 3 N 4 and P3HT. A series of characterizations were employed to investigate the chemical structure , morphology and optical property of the obtained catalysts. And the photocatalytic activity of the as-prepared g-C 3 N 4 /Ag/P3HT composites were evaluated by the degradation of tetracycline (TC) and methyl orange (MO) aqueous solution under visible light irradiation. Results show that the g-C 3 N 4 /Ag/P3HT exhibits a broad absorption band in the region of 400–700 nm and the photocatalytic activity of g-C 3 N 4 /Ag/P3HT obtains a great improvement comparing with that of g-C 3 N 4 , g-C 3 N 4 /Ag and g-C 3 N 4 /P3HT. In addition, the optimized loading content of P3HT is 0.3 mass% based on g-C 3 N 4 . The enhanced photocatalytic performance is due to the introduction of Ag, which improves the transfer of photoexcited charges between g-C 3 N 4 and P3HT. The active species trapping experiment shows that the main active specie is O 2− . After five recycling experiments, the g-C 3 N 4 /Ag/P3HT shows high stability in the photocatalytic performance.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Baolai Wang,Kaili Wei,Fuming Chen,Yinzhen Wang,Guannan He,Wei Li,Junming Liu,Qinyu He
It has been found it more difficult in completely degrading A-ring of tetracycline (TC) than completely degrading B-D rings of tetracycline. Thus, it is very necessary to find an effective route to completely degrading A-ring of tetracycline. In this work, a Z-scheme heterojuncted core-shell La(OH) 3 @BaTiO 3 composite (LB) was designed and fabricated through hydrothermal method . Many characterization techniques were employed to investigate the microstructure, phases, composition, energy band structure , and the lifetime of photogenerated carriers. In the mean time, the photocatalytic properties, including the degradation of A-ring and B-D rings of TC, as well as active species during photo-degradation were investigated. It is found that the as-prepared LB has an improved lifetime of photo-produced carriers, as well as high photocatalytic properties, being attributed to the core-shell structured heterojunction La(OH) 3 @BaTiO 3 . In addition, it is also found that ·O 2 − is more effective on degrading A-ring of TC than other active species, likely owed to the PKa3 value (3.3) of A-ring in TC. This work has supplied a route to completely degrading the A-ring of TC: rationally design and prepare a Z-scheme heterojuncted composites which supply very negative conduction band bottom potential.
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ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Jun-Tao Cao,Jing-Lu Lv,Xiao-Jing Liao,Shu-Hui Ma,Yan-Ming Liu
To achieve high sensitivity for biomolecule detection in photoelectrochemical (PEC) bioanalysis, the ideal photoelectrode and ingenious signaling mechanism play crucial roles. Herein, the feasibility of the photogenerated hole-induced chemical–chemical redox cycling amplification strategy on a Z-scheme heterostructure photoelectrode was validated, and the strategy toward enhanced multiple signal amplification for advanced PEC immunoassay application was developed. Specifically, a direct Z-scheme Bi2S3/Bi2MoO6 heterostructure was synthesized via a classic hydrothermal method and served as a photoelectrode for the signal response. Under the illumination, the PEC chemical–chemical redox cycling (PECCC) among 4-aminophenol generated by the enzymatic catalysis from a sandwich immunoassay, ferrocene as a mediator, and tris (2-carboxyethyl) phosphine as a reducing agent was run on the Z-scheme Bi2S3/Bi2MoO6 heterostructure photoelectrode. Exemplified by interleukin-6 (IL-6) as the target, the applicability of the strategy was studied in a PEC immunoassay. Thanks to the multiple signal amplification originating from the high efficiency of the PECCC redox cycling system, the enzymatic amplification, and the fine performance of the Z-scheme Bi2S3/Bi2MoO6 heterostructure photoelectrode, the assay for IL-6 exhibits a very low detection limit of 2.0 × 10–14 g/mL with a linear range from 5.0 × 10–14 to 1.0 × 10–8 g/mL. This work first validates the feasibility of the PECCC redox cycling on the Z-scheme heterostructure photoelectrode and the good performance of the strategy in PEC bioanalysis. We envision that it would provide a new prospective for highly sensitive PEC bioanalysis on the basis of a Z-scheme heterostructure.
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Bo Peng,Yue Lu,Jun Luo,Ziling Zhang,Xu Zhu,Lin Tang,Lingling Wang,Yaocheng Deng,Xilian Ouyang,Jisui Tan,Jiajia Wang
A visible light self-powered photoelectrochemical (PEC) aptasensor based on silver chromate particles, graphitic carbon nitride nanosheets and graphene oxide sheets (Ag 2 CrO 4 /g-C 3 N 4 /GO) for the ultrasensitive detection of chloramphenicol (CAP) was reported in this work. g-C 3 N 4 was considered to be the fundamental photoelectric material because of its great oxidation ability of photogenerated hole as well as excellent biocompatibility and low toxicity. However, the narrow light absorption range and rapid carrier recombination rate limit the application of pure g-C 3 N 4 . Herein, Ag 2 CrO 4 and GO as photosensitizer were introduced to improve the photoelectric properties of g-C 3 N 4 . The photocurrent of the developed ternary composite was about 3 times higher than that of pristine g-C 3 N 4 , which proves it can be used as a suitable photoelectric active material. Moreover, the mechanism of Z-scheme electron transfer path was proved by density functional theory (DFT) calculation. The fabricated PEC aptasensor exhibited high sensitivity toward CAP with a wide liner response of 0.5 pM to 50 nM and a detection limit of 0.29 pM. The specific recognition mechanism and excellent sensing performance indicated this aptasensor could serve as a useful tool for selective and ultrasensitive CAP detection in practical analysis.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
·
IF 6.361
Haiping Li,Guiming Ba,Zhiwei Liang,Quanhua Deng,Wanguo Hou
Construction of Z-scheme heterojunction (ZCH) is one of the most effective ways to enhance photocatalytic performance of photocatalysts . The direct all-solid-state p - n ZCH shows the best prospect, but its fabrication mechanism, especially function of the interfacial electric field (IEF) was rarely expounded explicitly. Herein, a direct all-solid-state p - n copper indium disulfide/tungsten oxide (CIS/WO) ZCH was prepared through a facile hydrothermal process for the first time. The CIS/WO ZCH exhibits enhanced photocatalytic activity because of significantly accelerated photogenerated charge separation via a Z-scheme charge migration process. The Z-scheme charge transfer pathway is inferred from matched energy band levels of CIS and WO and the IEF is confirmed to play a key role. The CIS/WO ZCH can fast produce singlet oxygen via hole oxidation of superoxide radicals under visible light irradiation, while pure CIS and WO cannot, effectively verifying the Z-scheme charge transfer process. This work illustrates the principle for fabrication of the direct all-solid-state p - n ZCH and function of the IEF, as well as provides a new ZCH.
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高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 10
·3327-3337
·
IF 4.052
Jingjing Shi,Shuangde Li,Fengming Wang,Lina Gao,Yanmei Li,Xiaorang Zhang,Jun Lu
Zinc cadmium sulfide solid solution (ZnxCd1−xS) photocatalysts have received significant attention in energy and environmental applications because of their wide and strong visible light absorption range. However, the high photogenerated electron–hole pair recombination rate is an innate problem for their application. In this study, Cu2S/Zn0.67Cd0.33S (CZCS) nanosheet heterojunctions were fabricated by the in situ topotactic hydrothermal transformation of CuZnCdAl layered double hydroxide (LDH) precursors. Structural and morphological characterization indicated that the CZCS nanosheets were 2D/2D atomic-level in-plane heterojunctions with matched crystalline orientation because of their intergrowth structure originating from the topotactic sulfurization of CuZnCdAl LDH precursors. This in-plane intergrowth structure enhanced the separation of photogenerated electron–hole pairs based on a direct Z-scheme mechanism, which, in addition to providing a wide light absorption range and appropriate flat band potential, endowed excellent photocatalytic hydrogen production at the rate of 15.27 mmol h−1 g−1 (about 3.82 times that of pure Zn0.67Cd0.33S) from water splitting under visible light irradiation without the additive Pt cocatalysts. This photocatalyst with a superior photocatalytic activity and cycling stability can serve as a hopeful candidate for applications in the energy and environment field.
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高影响因子
Materials Today Advances
·
2022
·
IF 9.918
Zhaoyu Ma,Wenping Li,Xiaofang Jia,Yue Lu,Yang Li,Hong Gao,Junying zhang
A key solution for high-efficiency solar-to-fuel conversion is fabrication of semiconductor photocatalysts with ultra-broad spectral absorption and high charge-carriers utilization efficiency. Here, we report a non-metallic plasmonic Z-scheme photocatalyst with three-dimensional (3D) W 18 O 49 hierarchical microflowers and two-dimensional (2D) g-C 3 N 4 nanosheets constructed by an electrostatic self-assembly method. The hydrogen production performance of the heterojunction is three times that of pure g-C 3 N 4 . This is ascribed to the efficient harvesting of photon energy from the ultraviolet to near-infrared region and the improved charge-carrier transfer on the tight-contact heterojunction interface. This work not only provides an effective reference for the construction of heterostructure based on W 18 O 49 and g-C 3 N 4 , but also helps design materials for satisfactory solar energy conversion performance through electrostatic self-assembly methods.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Nan Su,Shasha Cheng,Pingfan Zhang,Hongjun Dong,Yuhai Fang,Xiangtong Zhou,Yun Wang,Chunmei Li
The interfacial charge transfer control is a key and arduous issue for propelling the migration/separation of photogenerated carriers for heterojunction photocatalysts . Here, a new 2D/2D C 3 N 4 /C 3 N 5 nonmetal van der Waals (VdW) heterojunction is fabricated by the simple self-assembly technique in acidic medium, whose charge separation efficiency is promoted dramatically, thus being endowed with the high-efficiency photocatalytic hydrogen evolution (PHE) performance. The PHE rate reaches up to 3.33 mmol h −1 g −1 under the visible light and the apparent quantum efficiency (AQE) of 20.6% is achieved at 420 nm on the optimal 2D/2D C 3 N 4 /C 3 N 5 -5% sample. Furthermore, the 2D/2D C 3 N 4 /C 3 N 5 nonmetal VdW heterojunction also exhibits the desired stability because there was no significant decrease after PHE reaction of 10 cycles with total 40 h. Such outstanding PHE activity and stability originate from the impelled separation of photoinduced charge carriers and the powerful interfacial interaction through forming Z-Scheme charge transfer path and π-π coupling effect between C 3 N 4 and C 3 N 5 nanosheets . This work takes a significant guiding and demonstration for designing and exploiting other novel nonmetallic polymer-based VdW heterojunctions in the photocatalytic application field.
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高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2018
·
IF 2.593
Cuiping Lin,Xin Xie,Chen Li,Qishe Yan
The magnetic Co 0.5 Zn 0.5 Fe 2 O 4 incorporated Ag 3 PO 4 photocatalysts were fabricated by facile sol-gel and hydrothermal route. The resulting Co 0.5 Zn 0.5 Fe 2 O 4 /Ag 3 PO 4 composites were characterized by XRD , 1 SEM, 2 UV–vis DRS , 3 FT-IR 4 and VSM. 5 The results indicated that the magnetically separable composites with good dispersity showed a strong absorption in the uv–vis region and the saturation magnetization was 85.25 emu g −1 . Anionic dye methyl orange (MO) and tetracycline hydrochloride (TCH) were used to evaluate the activity of the photocatalysts . The result revealed that the magnetic composites exhibited enhanced photocatalytic activity and stability under the visible light irradiation. The ·OH and ·O 2 - radicals were found to be the major active species during the photodegradation of TCH, while·O 2 - played the important role in photodegrading MO. And a Z-scheme mechanism for the enhanced photocatalytic process was proposed.
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高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 18
·185701
·
IF 3.551
Xiaofeng Cui,Yu Zhou,Jian Wu,Shan Ling,Lijun Zhao,Jianli Zhang,Junwei Wang,Wei Qin,Yuanguang Zhang
A solid-state Z-scheme system, with the synergistic integration of the advantages of various narrow-band semiconductors, is considered to be a potential strategy to develop efficient photocatalysts for operation under visible light illumination. However, the charge separation efficiency of these systems has always been reduced by disordered electron transfer between coupling semiconductors. In this work, we constructed a direct Z-scheme system WO3-MoS2-Pt through the loading of WO3 quantum dots onto MoS2 nanosheets and the selective depositing of a Pt co-catalyst onto MoS2. X-ray diffraction, transmission electron microscopy, atomic electron microscopy and x-ray photoelectron spectroscopy, etc were used to confirm the successful preparation of the targeted photocatalyst. This photocatalytic system showed high visible-light-driven H2 evolution activity (802.2 μmol · h−1 · g−1) and good photostability. Control experiment and mechanism analysis suggested that the remarkable performance can be attributed to the heterojunction formed WO3 and MoS2 and the vectorial electron transfer (WO3 → MoS2 → Pt) achieved by selectively loading the Pt co-catalyst.
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