JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Chao Wang,Yao Xue,Peifang Wang,Yanhui Ao
It is necessary to find visible light responsive photocatalysts for rapid and simple degradation of organic pollutants in water environment. In this work, a visible light responsive composite photocatalyst AgI/UiO-66 was prepared by an in situ growth method. Sulfamethoxazole (SMZ) antibiotic was selected as the target contaminant to probe the photocatalytic performance of the as-prepared AgI/UiO-66 composite under visible light irradiation. The results showed that the photocatalytic performance of the AgI/UiO-66 composite enhanced significantly compared to pure AgI. The effects of typical environment factors (i.e. pH, inorganic salt ions and common anions) on the degradation of SMZ were evaluated extensively. Results showed that the investigated pH (5.2, 7.0, 9.5) had no apparent effect on the photocatalytic degradation of SMZ except pH 2.5, at which the degradation rate of SMZ decreased significantly. In addition, inorganic salt ions and Cl − , HCO 3 − and SO 4 2− anions in water exhibited no apparent effect on the degradation of SMZ. The effect of water matrix on the degradation of SMZ was also investigated. In the river water, the removal efficiency of SMZ was reduced compared with the cleaner water matrix. The capture experiments of radicals confirmed that superoxide radicals ( O 2 − ) and hydroxyl radicals ( OH) were the main active species for the photocatalytic degradation of SMZ in the present work. Finally, the tentative degradation pathways of SMZ were proposed based on the intermediates analysis.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 3
·e70037
·
IF 0
Qiuyun Zhang,Maozhen He,Jialu Wang,Shijian He,Mei Deng,Yanhui Lei,Xiaojuan Zhang,Jingsong Cheng,Zhengjun Liu,Yutao Zhang
The construction and optimization of an effective photocatalyst for photodegradation of persistent recalcitrant organic remains challenging. In this work, MIL-101(Cr)-based nanocomposites (AgI@MCr) are proposed to be fabricated by a simple, green solvent, and room temperature in situ preparation strategy, achieving a highly efficient photocatalytic degradation of organic dye rhodamine B (RhB) molecule under visible light irradiation. Extensive characterization (XRD, FTIR, N 2 adsorption–desorption, SEM and EDS, TG, XPS, UV–vis DRS, PL, transient photocurrent, and EIS) confirmed the composite material's structure, morphology, elemental composition, and optical characteristics. Among all the prepared nanocomposites, AgI@MCr-2 demonstrates outstanding photocatalytic performance for RhB with a removal efficiency of 95.4% within 70 min, and a reaction kinetics of 0.0392 min −1 , superior to pristine AgI or MIL-101(Cr), and also shows excellent durability, retaining over 80% RhB degradation efficiency after four cycles. Remarkably, the significant enhancement is attributed to the built interfacial contact and synergistic effect between substances in the nanocomposite, high specific surface area, strong visible light–harvesting capacity, low bandgaps, and high electron–hole pair separation. In addition, a possible degradation route for the AgI@MCr nanocomposite is further proposed using various analysis techniques. This study provides valuable references for developing effective multicomponent MOF-based photocatalytic composite materials for dyeing wastewater treatment and environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
BIOSENSORS & BIOELECTRONICS
·
2015
·
IF 6.409
Jingming Gong,Tian Fang,Dinghua Peng,Aimin Li,Lizhi Zhang
A rapid and ultrasensitive signal-off photoelectrochemical sensor has been developed under visible-light irradiation, for the detection of perfluorooctanoic acid (PFOA), especially low level PFOA present in environment, whereby a novel nanostructured probe made of molecularly imprinted polymer (MIP) modified AgI nanoparticles–BiOI nanoflake arrays (AgI–BiOINFs) is designed as the photoactive electrode (denoted as MIP@AgI–BiOINFs). Here, the unique nanoarchitectured hybrid of AgI–BiOINFs was first in situ synthesized via a facile successive ionic layer adsorption and reaction (SILAR) approach and then employed as a matrix to graft the recognition element of MIP. Such a newly designed PEC sensor exhibits high sensitivity and selectivity for the determination of PFOA. The PEC analysis is highly linear over the PFOA concentration ranging from 0.02 to 1000.0 ppb with a detection limit of 0.01 ppb ( S / N =3). This value obtained by using the facile PEC sensor is comparable to the results obtained by using well-established liquid chromatography–tandem mass spectrometry (LC–MS/MS). Toward practical applications, this low-cost and sensitive assay was successfully applied to measure PFOA in real water samples.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 2
·1-7
·
IF 6.408
Zhang Bing,Wang Xue,Cheng Yan
A photochromic immunoassay was built for tumor marker detection based on ZnO/AgI nanophotocatalyst. Frist, ZnO/AgI nanoparticles were synthesized and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and Fourier transform infrared spectrometry (FTIR). The color development is caused by tetramethyl benzidine (TMB) solution oxidated by ZnO/AgI nanomaterials. The electron transitions in ZnO/AgI nanomaterials are driven by visible light irradiation, generating photogenerated hole and oxidizing TMB to blue solution. Appropriate band width between ZnO and AgI promotes separation of photogenerated electrons and holes and enhances oxidation efficiency. A sandwich-type immunoassay was constructed based on ZnO/AgI nanomaterial as labels. The absorbance at 650 nm of reaction solution is positively correlated with antigen concentration. The developed immunoassay showed good performance for carcinoma embryonic antigen (CEA) detection in the range 0.1–7.0 ng/mL with a detection limit of 65 pg/mL. The photochromic immunoassay also exhibited preferable selectivity, repeatability, and stability. Graphical abstract A novel colorimetric immunoassay was constructed based on ZnO/AgI photocatalyst. ZnO/AgI nanomaterials occur electron transitions under visible light irradiation and generate photogenerated hole, which can oxidize TMB to blue solution. Carcinoembryonic antigen in sample was detected sensitively due to the high catalytic efficiency of ZnO/AgI nanomaterials.
研究领域:
生物化学
·
纳米技术
·
分析化学
·
癌症研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Bingkun Liu,Guanghui Wang,Jinyang Li,Beibei Liu,Ruoyu Li,Hongda Huang,Hengzhen Shi,Jingtao Zhang
MoS 2 quantum dots decorated g-C 3 N 4 /AgI Z -scheme heterostructures were successfully prepared and applied in tetracycline hydrochloride (TCH) degradation and Escherichia coli ( E. coli ) disinfection upon visible light exposure. The ternary heterojunction achieved highly efficient photocatalytic abilities, which could eliminate 82.8 % of TCH in 50 min and absolutely kill E. coli in 40 min, superior to those of bare g-C 3 N 4 , AgI, g-C 3 N 4 /MoS 2 and g-C 3 N 4 /AgI binary composites. Benefiting from the Z -scheme heterostructure, the separation and migration efficiency of charge carriers in the g-C 3 N 4 /MoS 2 /AgI composite was greatly improved, which led to more effective production of predominant O 2 − and OH during the photocatalytic process. This work delivered an example of highly efficient composite photocatalyst and discussed the role of MoS 2 QDs as charge transfer mediator in Z -scheme photocatalytic system.
研究领域:
环境科学
·
材料科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 15
·12638-12648
·
IF 2.22
Zhou Xiaohong,Chen Yongyang,Wang Peiying,Xu Chengyang,Yan Qishe
The AgI/BiPO 4 n–n heterojunction hybrids were favorably fabricated over amorphous particles AgI closely in contact with petty polyhedron-assembled star-like BiPO 4 by precipitation technology for the first time. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–Vis diffuse reflectance spectra (DRS), electrochemical test, etc. The degradation of tetracycline hydrochloride (TC) and methylene blue (MB) was employed to testify the performance of as-prepared composites upon exposure of simulated solar light and the AB-X composites exhibited boosted degradation efficiency in comparison with the as-prepared pure BiPO 4 and AgI. For instance, the calculated k TC of pseudo-first-order kinetics model on 24 wt% AgI/BiPO 4 sample was 36 times relative to those on pure BiPO 4 . This enhanced activity might due to increased charge transfer and separation efficiency in the formed n–n heterojunction and the dominant reaction active species were authenticated by trapping experiments. Furthermore, the internal electric field in the AgI/BiPO 4 heterojunction and the transfer path of electron–holes were tentatively deduced through graphical elucidation.
研究领域:
材料科学
·
环境化学
·
光催化
·
纳米材料
·
半导体异质结
·
污染物降解
·
能源与环境技术
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2014
·
IF 1.968
Yunfang Chen,Jianzhang Fang,Shaoyou Lu,Yan Wu,Dazhi Chen,Liyan Huang,Weicheng Xu,Ximiao Zhu,Zhanqiang Fang
In this work, a new plasmonic photocatalyst Ag/AgI/BiOI-rectorite was prepared via a cation exchange process. The photocatalyst had been characterized by X-ray powder diffraction (XRD), Raman spectra, nitrogen sorption (BET), field-emission scanning electron microscope (FE-SEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectroscopy (DRS). The photocatalytic activity, which was evaluated by degradation of rhodamine B (RhB) and bisphenol A (BPA) under visible light irradiation, was enhanced significantly by loading Ag/AgI/BiOI nanoparticles onto rectorite . The photogenerated holes and superoxide radical ( O 2 − ) were both formed as active species for the photocatalytic reactions under visible light irradiation. The existence of metallic Ag particles, which possess the surface plasmon resonance effect, acted as an indispensable role in the photocatalytic reaction.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Tianqi Liu,Hailian Huang,Yunzong Liu,Konstantinos Papadikis,Beata Layla Mehdi,Pow-Seng Yap,Graham Dawson
A novel magnetic quinary nanocomposite, protonated g-C 3 N 4 /Fe 3 O 4 /AgBr/AgCl/AgI, was synthesized using a wet chemical method. The multi-heterojunction photocatalyst with multi carrier source and multi-channel carrier transport is constructed to enhance the photocatalytic degradation performance of pure g-C 3 N 4 . The design of the quinary nanocomposite is also an effective approach solving the chemical stability problem of silver halides. The photocatalytic degradation efficiency under visible light irradiation was analyzed for methylene blue (MB) as the target organic pollutant. The quinary nanocomposite with 10 % g-C 3 N 4 displayed high photocatalytic performance, with 83 % of MB degraded under 6 h LED white light irradiation. The effective quinary nanocomposite has good magnetic properties and can be magnetically separated to prevent secondary pollution of the photocatalyst in water. The band gap of protonated g-C 3 N 4 /Fe 3 O 4 /AgBr/AgCl/AgI was found to be lower than pure g-C 3 N 4 . Parameters such as initial concentration of pollutant, initial solution pH, and light source were studied. Zeta potential results showed that the quinary nanocomposite could disperse homogenously to decrease aggregation in the solution. The photocatalytic mechanism was investigated, and the mineralization results were analyzed based on liquid chromatography-mass spectroscopy (LC-MS) and total organic carbon (TOC). It was found that the hydroxyl and superoxide radicals were major reactive species by scavenging experiments. Additionally, protonated g-C 3 N 4 /Fe 3 O 4 /AgBr/AgCl/AgI nanocomposite showed excellent reusability after magnetic separation and regeneration, thus suggesting it to be a promising photocatalyst for treating wastewater containing organic contaminants.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2020
·Vol. 10
·期 4
·373
·
IF 3.52
Junjiao Zhang,Zhengru Zhu,Junchao Jiang,Hong Li
AgI/MFeO3/g-C3N4(M = Y, Gd, La) nano sheet–sphere–sheet photocatalysts were synthesized by a simple ultrasound-assisted hydrothermal approach. We characterized the microstructure, surface morphology, and optical absorption capacity of the obtained samples. According to the characterization results, AgI/MFeO3/g-C3N4(M = Y, Gd, La) nano sheet–sphere–sheet photocatalysts were successfully obtained. MFeO3nanospheres and AgI nanosheets were dispersed evenly on the surface of g-C3N4nanosheets. AgI/MFeO3/g-C3N4showed remarkable photocatalytic. Especially, 95% of NOF was photodegradated over AgI/LaFeO3/g-C3N4within 3 h and the higher photocatalytic performance still remained after six cycles. Additionally, The N2adsorption–desorption isotherms of AgI/MFeO3/g-C3N4showed that AgI/LaFeO3/g-C3N4possessed the highest specific surface area (79.32 m2/g). The result of scavenging experiment revealed that ·O2−, h+, and ·OH were the main roles in the photodegradation process. Benefitting from the nice energy band matching, MFeO3acted as the center of photogenerated electrons migration and separation provided more direct electron channels. This work proposes an effective approach for the design and configuration of dual Z-scheme photocatalysts to accomplish the removal of organic contaminants based on g-C3N4.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 34
·16584-16592
·
IF 3.925
Yingdi Wang,Liangliang Lin,Yuming Dong,Xiang Liu
The MOF-808/AgI (MA) photocatalyst was synthesized through a plain ion-exchange precipitation means. The crystalline phase structure, microcosmic appearance, elemental composition and optical performance of the catalyst were tested by XRD, SEM, TEM, XPS, UV-vis DRS, EIS, PL and ESR techniques. Tetracycline hydrochloride (TC) was selected as the simulated contaminant for photodegradation experiments to estimate the photocatalytic properties of the as-prepared materials. The results suggested that the degradation performance of the MA compounds was significantly enhanced, and the composite with a AgI loading of 40% (MA-40) showed the best degradation performance with a 93.65% degradation rate in 80 min. Furthermore, the radical capture experiments proved that ˙O2−, 1O2 and h+ were the principal active intermediates in the photochemical catalysis process. Therefore, it can be speculated that the loading of AgI enhanced the visible light absorption and a Z-scheme heterojunction between the two components was formed, which promoted the separation of photogenerated carriers.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiamin Wei,Qing Wang,Mian He,Shuai Li,Yunan Zhang,Yang Yang,Shipeng Luo,Lianshe Fu,Xin Wang,Tinghai Yang
The development of highly efficient strategy to facilitate comprehensive charge transmission and effective spatial charge separation is expected as a promising approach to improve photocatalytic performance. Herein, the Fe(III) doping modified AgI/NH 2 -MIL-68(In/Fe) Z-scheme heterojunction (ANM-x composite) with unique internal and interfacial charge transmission performance was fabricated by a facile ion exchange precipitation method. The optimized ANM-50 composite exhibits the maximum photocatalytic activity for the degradation of tetracycline, which is about 9.54, 2.61 and 1.86 times higher than that of pure NH 2 -MIL-68In, NH 2 -MIL-68(In/Fe) and AgI, respectively. The characterization results displayed that Ag nanoparticles (NPs) were generated during the photocatalytic procedure, which not only served as a charge transfer-highway, but also reduced the charge flow energy barrier, thereby accelerating charge transfer efficiency and consolidating the stability of the Z-scheme heterojunction. Mechanism exploration reflected that the superior photocatalytic performance was associated with synergetic effect among the introduced Fe(III), constructed ANM Z-scheme heterojunction and the generated Ag NPs, which significantly expands visible light response range and promotes more effective internal and interfacial charge separation. This research not only designs an efficient photocatalyst for decomposing tetracycline, but also opens a new perspective for rational developing Z-scheme heterojunction with unique internal and interfacial charge flow steering.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Materials Advances
·
2025
·
IF 4.7
Xinxin Li,Lianjie Du,Zhou Wan,Doudou Xu,Chen Liu
In this study, novel ZnO/BiOI/AgI ternary heterojunction photocatalysts were synthesized via a facile precipitation method to address challenges in organic pollutant degradation and microbial disinfection under visible light irradiation. The composites were systematically characterized (XRD, SEM, TEM, XPS, BET, UV-vis DRS, and PL), showing significantly enhanced visible light absorption, efficient charge carrier separation, and superior photocatalytic performance, compared to binary and single-component counterparts. The optimized ZnO/BiOI/AgI-3030 sample achieved 98.1% degradation of Rhodamine B (RhB) and 59.1% degradation of Norfloxacin (NOR) within 3 hours, attributed to the synergistic effects of the heterojunction structure, which facilitated efficient charge transfer and promoted the generation of reactive oxygen species (ROS). Furthermore, the composite demonstrated remarkable antibacterial activity against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and methicillin-resistant Staphylococcus aureus (MRSA), with bactericidal rates exceeding 99.8%. Cytotoxicity assays revealed 88.79% inhibition of DLD-1 colorectal cancer cells. Mechanistic studies confirmed the formation of a unique n–p–n heterostructure, enabling effective charge carrier separation and strong redox capabilities. Additionally, the photocatalysts exhibited excellent stability and reusability over four consecutive degradation cycles, maintaining high catalytic efficiency. These findings underscore the potential of ZnO/BiOI/AgI ternary composites as efficient and sustainable photocatalysts for environmental remediation and antimicrobial applications.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）