APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2021
·Vol. 127
·期 1
·1-8
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IF 2.584
Zhou Chenglin,Liao Gengcheng,Qiao Hui,Qi Xiang
A novel MoS 2 /Ag 2 CO 3 Z-scheme system was synthesized by a simple chemical depositing method. The morphology and material components of MoS 2 /Ag 2 CO 3 Z-scheme system were confirmed by scanning electron microscopy and Raman spectroscopy. Photoelectrochemical (PEC) tests demonstrated that the photocurrent density of MoS 2 /Ag 2 CO 3 Z-scheme system can reach up to 13 µA/cm 2 in 0.5 M Na 2 SO 4 solution at a bias voltage of 0.5 V, which is 44 times more than pure MoS 2 , as well as 13 times higher than pure Ag 2 CO 3 . Lastly, the stability measurement of MoS 2 /Ag 2 CO 3 Z-scheme system in 0.5 M Na 2 SO 4 solution was carried out showing no obvious difference after processing 50 cycles. This work demonstrates that the MoS 2 /Ag 2 CO 3 Z-scheme system may have a great potential application in photocatalytic water splitting.
研究领域:
材料科学
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能源科学
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光催化
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2014
·Vol. 50
·期 4
·1718-1727
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IF 2.305
Shi Lei,Liang Lin,Wang Fangxiao,Liu Mengshuai,Sun Jianmin
A facile direct growth method was developed for the fabrication of Ag 2 CO 3 nanoparticles on the surface of g-C 3 N 4 at room temperature. The as-prepared g-C 3 N 4 /Ag 2 CO 3 composites were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy with energy dispersion X-ray spectroscopy, UV–vis diffuse reflectance spectroscopy, and photoluminescence spectroscopy. The photocatalytic activities were evaluated by degrading Rhodamine B dye. The results indicated that Ag 2 CO 3 nanoparticles with the size of 5–10 nm were finely distributed on the surface of g-C 3 N 4 sheet, leading to the enhancement of the photocatalytic activity. And when the mass ratio of g-C 3 N 4 to Ag 2 CO 3 was 1:4, the as-prepared composites exhibited the optimum photocatalytic activity, which was approximately 8 and 3 times higher than pure g-C 3 N 4 and Ag 2 CO 3 , respectively. The enhanced photocatalytic performance could be attributed to the synergetic effects between g-C 3 N 4 and Ag 2 CO 3 , including the smaller particle size of Ag 2 CO 3 and high charge separation efficiency of the photogenerated electron–hole pair. More attractively, the stability of Ag 2 CO 3 was improved due to its highly dispersion on g-C 3 N 4 sheet. In addition, based on the experimental results, the Z-scheme mechanism for the photodegradation over g-C 3 N 4 /Ag 2 CO 3 composites was proposed.
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 PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
·
IF 3.261
Minghuan Gao,Lisha You,Linna Guo,Tiesheng Li
Polyhedron-like WO 3 (n-type WO 3 ) nanoparticles were synthesized by a simple hydrothermal reaction without using any template or surfactant. The Polyhedron-like WO 3 /Ag 2 CO 3 p-n junction photocatalyst was first synthesized by a simple impregnation-deposition way. The obtained samples were investigated by XRD, BET, XPS, SEM, TEM etc. The separation mechanisms of photo-induced electrons (e − ) and photo-induced holes (h + ) of the Polyhedron-like WO 3 /Ag 2 CO 3 p-n junction samples were characterized by PL technique, EIS and determination of active sites and species in the photocatalytic reactions. In this p-n junction structure, Polyhedron-like WO 3 nanoparticles adhered to the surface of the Rod-like p-type Ag 2 CO 3 nanoparticles. The Polyhedron-like WO 3 /Ag 2 CO 3 p-n junction photocatalyst showed much higher photocatalytic activity than both single materials for RhB degradation under UV–vis light irradiation, and even 17 times higher than commercial powders (P25) at the same circumstance. Even compared with the related photocatalyst, it still exhibits the highest photocatalytic ability. The highly enhanced photocatalytic of the Polyhedron-like WO 3 /Ag 2 CO 3 p-n junction photocatalyst can be attributed to extended absorption, more effective separation of photogenerated charges, the transfer rate of photo-induced charge carriers and forming of p-n junction system.
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 MATERIALS SCIENCE
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2021
·Vol. 56
·期 13
·8060-8078
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IF 4.22
Wang Pengfei,Zhao Haoxu,Li Shutao,Jing Ruisen,Liu Yao,Jiang Ning,Bian Fenggang,Liu Yunyan,Liu Huiqiang,Zhang Qian
In this paper, PDDA-functionalized black phosphorus nanosheets (BP) was used to construct BP/Ag 2 CO 3 heterojunction photocatalyst by a simple co-precipitation process. The morphology, photoelectrochemical, and photocatalytic performance of BP/Ag 2 CO 3 heterojunction photocatalyst were systematically characterized and analyzed. BP was proved to enhance the transport efficiency and restrain the recombination efficiency of the carriers in the BP/Ag 2 CO 3 heterojunction. At the same time, BP greatly suppressed the Ag 2 CO 3 photo-corrosion and improved the stability for methyl orange (MO) degradation. After four cycles, compared with the 19.2% degradation rate of MO in pure Ag 2 CO 3 , the photocatalytic activity remained as high as 87.1% in 15-BP/Ag 2 CO 3 heterojunction. The Mott–Schottky and active species capture experiments enabled us to obtain the BP/Ag 2 CO 3 heterojunction band gap configuration, and propose the reaction mechanism of the direct Z-scheme. The in-situ X-ray photoelectron spectroscopy (XPS) analysis and work function calculation verified the charge transfer in BP/Ag 2 CO 3 direct Z-scheme heterojunction. This Z-scheme mechanism interpreted the enhanced photocatalytic stability of BP/Ag 2 CO 3 for inhibiting the Ag + photoreduction in the conduction band of Ag 2 CO 3 , and meanwhile elucidated the extremely improved photocatalytic activity by restraining the recombination of electron-hole pairs. This work is expected to be useful in providing a facile route for designing novel heterojunction photocatalytic material and carrying out high-efficiency wastewater treatment.
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
PROCESS BIOCHEMISTRY
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2019
·
IF 2.883
Bing Zhang,Yejing Jia,Jing Wang,Honghong Chang,Zhihuan Zhao,Yan Cheng
Under the limitations of advanced instruments and professional operations, straightforward readouts play an increasingly vital role in immunoassays. Herein, a Ag 2 CO 3 @Ag nanocomposite-mediated colorimetric and photothermal immunoassay was developed to detect carcinoembryonic antigen (CEA). The Ag 2 CO 3 @Ag nanocomposites could oxidize 3,3’,5,5’-tetramethylbenzidine to form blue oxidation products (TMB ox ) due to the acidic dissolution of Ag 2 CO 3 under acidic conditions. TMB ox presented a strong photothermal effect driven by a near-infrared (NIR) laser. Therefore, TMB ox could act as a photothermal probe to convert immunoassay signals into thermal signals. The Ag 2 CO 3 @Ag nanocomposite was characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray powder diffraction (XRD). Then, a sandwich-type immunoassay was built on the surface of a magnetic bead, and CEA was quantified using a common thermometer based on the photothermal effect. Under optimal conditions, the temperature increased with increase of CEA concentrations in the range of 0.1 ng/mL–5 ng/mL. More importantly, this system exhibited high selectivity, good repeatability and outstanding stability.
研究领域:
生物化学
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医学诊断
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纳米技术
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Xuesen Wu,Yidong Hu,Yu Wang,Yansong Zhou,Zhonghui Han,Xiaoli Jin,Gang Chen
A novel ternary Ag 2 CO 3 /Ag/AgNCO Z-scheme heterojunction with excellent visible-light-driven photocatalytic performance was fabricated. The O 2 − and, h + were proved to be the photocatalytic active substances for the degradation of Rhodamine B (RhB) in Ag 2 CO 3 /Ag/AgNCO. Compared to pristine Ag 2 CO 3 and AgNCO, the enhanced photocatalytic activities of Ag 2 CO 3 /Ag/AgNCO could be attributed to the low resistance for interfacial charge transfer and desirable absorption capability. In addition, the Z-scheme photocatalytic mechanism is proved by the discussion of the band structure. This work could offer a new insight into the design and fabrication of advanced materials with Z-scheme structures for the efficient treatment of persistent pollutants in wastewater.
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
·
2025
·
IF 3.9
Shuo Yang,Kaiyue Li,Wei Feng,Ping Huang,Keyan Liu,Yuquan Zhuo,Wenhui Li,Ziwen Yang,Donglai Han
As the widespread discharge of antibiotics, pesticides, and dyes exacerbates water pollution, the development of efficient photocatalytic materials has become crucial for addressing this challenge. In this study, a new paradigm of n-p-p ternary heterojunction photocatalyst composed of ZnO nanospindle, Ag2CO3, and Ag2O nanoparticles was synthesized via a hydrothermal and coprecipitation method followed by calcination. By adjusting the calcination time, the phase transition from Ag2CO3 to Ag2O was precisely controlled, leading to enhanced charge separation, transition, and improved light absorption properties. The prepared ZnO/Ag2CO3/Ag2O (Z/AC/A) photocatalyst exhibited outstanding photocatalytic performance for the degradation of typical water pollutants, including 2,4-dichlorophenol (2,4-D), tetracycline (TC), and malachite green (MG) under simulated sunlight irradiation. And the photocatalytic efficiencies reached 90.8, 94.8, and 97.4%, respectively, with the ZnO/Ag2CO3/Ag2O photocatalyst, which was calcined at 195 °C for 12 min, abbreviated as Z/AC/A-3, demonstrating the highest activity. Radical scavenging experiments and electron spin resonance (ESR) tests revealed that superoxide radicals (•O2–) serve as the dominant active species, while holes (h+) and hydroxyl radicals (•OH) play secondary roles in the photocatalytic process. Additionally, the photocatalytic degradation mechanism was confirmed to follow a dual Z-scheme charge transfer pathway, which effectively enhanced the charge separation and photocatalytic performance. The photocatalyst also exhibited excellent structural stability and reusability over five consecutive cycles. These results suggest that the Z/AC/A n-p-p ternary heterojunction holds promising potential for practical photocatalytic applications in environmental remediation.
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
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Ping Wei,Shiheng Yin,Tao Zhou,Chao Peng,Xiaolong Xu,Juncai Lu,Minchao Liu,Jianbo Jia,Kun Zhang
The occurrence of pharmaceutical and personal care products (PPCPs) in the ambient environment has raised serious concerns. Herein, a dispersed ZnFe 2 O 4 nanoparticle loaded Ag@Ag 2 CO 3 nanorod hybrid (ZnFe 2 O 4 /Ag@Ag 2 CO 3 ) was facile prepared, and used as a solar light driven photocatalyst for the degradation of tetracycline (TC), a typical PPCPs. The hybrids were characterized by XRD, SEM, EDS, HRTEM, DRS, PL, TRPL, M−H , BET, XPS, ESR and photoelectrochemical testing. The ZnFe 2 O 4 was evenly dispersed on the surface of Ag@Ag 2 CO 3 nanorods of which diameter was about 100 nm. The obtained ZnFe 2 O 4 /Ag@Ag 2 CO 3 composites exhibited high TC degradation efficiency after 150 min Xe light illumination, which was much better than those of pure Ag@Ag 2 CO 3 and ZnFe 2 O 4 . The photodegradation reaction rate constant ( k ) of the optimum ternary photocatalyst (ZnFe 2 O 4 loading 5% wt) increased 4.04 times and 2.48 times than those of pure ZnFe 2 O 4 and Ag 2 CO 3 @Ag, respectively. More importantly, the stability and recovery capacity of the ZnFe 2 O 4 /Ag@Ag 2 CO 3 photocatalyst improved obviously than those of Ag@Ag 2 CO 3 . The reactive oxygen species (ROS) experiment indicated that • OH、h + and • O 2 − involved in the photocatalytic reaction process, and the ROS contributes order was • O 2 − > h + > • OH. The band positions of individual ZnFe 2 O 4 and Ag 2 CO 3 were elucidated via DRUV–Vis spectra and Mott-Schottky plots. Based on the results of ROS experiment and band structure of ZnFe 2 O 4 and Ag 2 CO 3 , it could be inferred that the photocatalytic reaction of ZnFe 2 O 4 /Ag@Ag 2 CO 3 abided by Z-scheme mechanism, that is, Ag acted as the electronic bridge between Ag 2 CO 3 and ZnFe 2 O 4 , and the • OH and • O 2 − were formed on the valence band (VB) of Ag 2 CO 3 and conduction band (CB) of ZnFe 2 O 4 , respectively, and then TC was further oxidized. The sufficient photocatalytic degradation of TC in ambient water revealed that a sunlight-driven ZnFe 2 O 4 /Ag@Ag 2 CO 3 photocatalytic process may be efficiently applied for the remediation of PPCPs contaminated natural waters.
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
OPTICAL MATERIALS
·
2023
·
IF 3.9
Zhaoxin Huang,Xiaoyuan Qiu,Dandan Chen,Xiaolong Wu,Shasha Zhang,Pengfei Zhu
A novel Ag 2 CO 3 /ZnFe 2 O 4 /bentonite composite photocatalyst with a Z-type heterojunction was prepared using a solvothermal-in situ precipitation method. Under optimal conditions, with a mass ratio of ZnFe 2 O 4 to bentonite at 1:1.5 and a mass ratio of Ag 2 CO 3 to ZnFe 2 O 4 /bentonite at 1:3, the removal rate of norfloxacin (NOR) solution at 30 mg/L by Ag 2 CO 3 /ZnFe 2 O 4 /bentonite under visible light irradiation was found to be as high as 94.40% At the same time, the photocatalyst has good universality and reuse stability. The experimental results of photocatalyst characterization and mechanism exploration demonstrate that the photocatalytic activity of Ag 2 CO 3 /ZnFe 2 O 4 /bentonite is significantly enhanced, which can be attributed to the effective separation of electron-hole pairs, improvement in visible light absorption capacity, and enhancement of adsorption properties. The radical capture experiments revealed that h + played a pivotal role in the photocatalytic degradation of NOR by Ag 2 CO 3 /ZnFe 2 O 4 /bentonite, while ·O 2 − and ·OH acted as secondary factors. Ultimately, a Z-type heterojunction electron transfer mechanism was proposed. This study proposes the Ag 2 CO 3 /ZnFe 2 O 4 /bentonite photocatalysts with excellent stability for the treatment of NOR.
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 the Taiwan Institute of Chemical Engineers
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2018
·
IF 3.849
Junlei Zhang,Zhen Ma
Novel Ag-Ag 2 CO 3 /Bi 2 MoO 6 composites were obtained through in situ formation of Ag 2 CO 3 rods/nanoparticles onto Bi 2 MoO 6 nanosheets, followed by photoreduction. These composites were found to be much more active than Bi 2 MoO 6 in photocatalytic degradation of rhodamine B (RhB) under visible-light irradiation. In particular, an Ag-Ag 2 CO 3 /Bi 2 MoO 6 composite with a theoretical Ag 2 CO 3 /Bi 2 MoO 6 mass ratio of ∼27.5% exhibited the highest photocatalytic activity. It was also the most active in photocatalytic degradation of methyl blue (MB) and tetracycline hydrochloride (TC), due to the enhanced visible-light absorption and efficient separation of photogenerated carriers. The good reusability of Ag-Ag 2 CO 3 /Bi 2 MoO 6 was verified by cycling degradation experiments. The dominant active species were found to be photogenerated holes (h + ). A possible photocatalytic mechanism was proposed.
研究领域:
材料科学
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环境科学
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光催化
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DOI
高影响因子
DESALINATION
·
2020
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IF 7.098
Haojie Zeng,Zongxue Yu,Liangyan Shao,Xiuhui Li,Meng Zhu,Yuchuan Liu,Xiaofang Feng,Ximei Zhu
A novel photocatalytic membrane was prepared by using graphene oxide (GO), UiO-66-NH 2 and Ag 2 CO 3 as basic materials on the surface of PVDF membrane by vacuum filtration self-assembly. The prepared Ag 2 CO 3 @UiO-66-NH 2 /GO (AgCO@UiO/GO) membrane was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The AgCO@UiO/GO membrane possessed the photocatalytic effects, which significantly enhanced the separation effect of dyes and Cr(VI) wastewater. In particular, the AgCO@UiO/GO membrane can achieve complete removal of MB , RB ,MR and Cr(VI) under light conditions maintaining the fluxes during filtration process reach about 50 L · m −2 · h −1 . In addition, after long-time experiments, the AgCO@UiO/GO membrane retained a higher removal rate and maintained a high flux under light conditions than without light for all dyes and Cr(VI). The unique structure of AgCO@UiO/GO membrane with a large number of screening structures and photocatalytic activity resulting a better removal rate for pollutants and reducing membrane fouling . Furthermore, the AgCO@UiO/GO membrane shows a great potential in improving membrane removal performance and a solution to balance trade-off effect.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2025
·
IF 4.9
Nannan Huang,Shuhao Liang,Xiangyang Liang,Huining Chai,Yingjie Sun,Lili Lyu,Weiqiang Tan
The interfacial compatibility of heterojunction photocatalysts critically governs the interaction modes between constituent materials. Herein, a flower-like Bi-BDC-NH 2 /Ag 2 CO 3 heterostructure was fabricated via a simple ion-exchange solution method, serving as a robust photocatalyst for the efficient photocatalytic reduction of Cr(VI) in simulated wastewater under visible-light irradiation. Ag 2 CO 3 nanosheets were in-situ grown on the surface of three-dimensional Bi-BDC-NH 2 , forming an Ag 2 CO 3 -on-Bi-BDC-NH 2 type II heterojunction that establishes intimate interfacial contact, significantly accelerating the charge and mass transport dynamics. In comparison with pure Bi-BDC-NH 2 and Ag 2 CO 3 , the optimal Bi-BDC-NH 2 /Ag 2 CO 3 -50 (with a weight ratio of 0.5:1) exhibited dramatically enhanced photocatalytic activity, achieving 99% Cr(VI) reduction within 2 hours under visible light (>420 nm, 150 W xenon lamp). Mechanistic investigations, including energy band structure analysis, radical trapping experiments, and photoelectrochemical measurements, revealed that the heterojunction interface significantly promotes the separation and transfer of photogenerated electron-hole pairs. This work provides valuable insights into the rational design of MOF-based heterojunction photocatalysts and their applications in environmental remediation.
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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光催化
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）