Journal of Industrial Textiles
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2022
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IF 2.926
Jing Han,Hai-Tao Ren,Ting-Ting Li,Bing-Chiuan Shiu,Yong-Gui Li,Jia-Horng Lin,Ching-Wen Lou
Visible light response PAN@Ag-Ag2O/Sch (PAN@AS, schwertmannite and polyacrylonitrile abbreviated as Sch and PAN) nanofibers with different mass ratios were synthesized by electrospinning technology and pH-induced precipitation reaction. X-Ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy analysis showed that the formation of Ag-Ag2O/Sch heterojunction and Ag-Ag2O nanoparticles were evenly distributed on the surface of Sch. The prepared nanofibers have high oxidative removal performance for As(III) under visible light. In the PAN@AS0.10 system, the total As removal percent can reach 90.96% after 120 min irradiation at pH 4.0. The scavenger experiments confirmed that the main active substances of the PAN@AS0.10 system were h+ and •OH. The high oxidation and removal performance of the PAN@AS0.10 composite for As(III) was attributed to the effective separation of photogenerated electron-hole pairs and high adsorption capacity of Sch for As under acidic conditions. This research provides a new material for the oxidation and removal of pollutants in water [such as As(III)] and also provides a research basis for the preparation of recyclable 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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 22
·1-21
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IF 2.8
Nazir Ahsan,Huo Pengwei,Jagirani Muhammad Saqaf,Akram Muhammad Yasir,Wang Huijie
In this study, a plasmonic p–n heterojunction Ag@Ag 2 O–BiVO 4 photocatalyst was successfully prepared by a simple chemical precipitation-reduction process. The obtained samples were tested by various measurements and the photocatalytic behavior in the decomposition of tetracycline (TC) under irradiation with visible light was studied. The photodegradation study exhibits that Ag@Ag 2 O–BiVO 4 has the optimum activity and can efficiently degrade 83.52% of TC in 60 min by irradiation with visible light. Furthermore, the Ag@Ag 2 O–BiVO 4 exhibited more pronounced visible light absorption and the best performances than the BiVO 4 and Ag 2 O–BiVO 4 , which was mainly due to the LSPR of plasmonic Ag. The experimental radical trapping proved that the active species of the photocatalytic process act in the following order: ·O 2 − > h + > · OH. To find intermediates, the possible TC degradation pathways via HPLC–MS were also investigated. This research provides a successful method to develop a plasmonic photocatalyst with p–n heterojunction for wastewater treatment.
研究领域:
环境科学
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材料科学
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高影响因子
International Journal of Nanomedicine
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2023
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IF 8
Ruojing Qian,Zhaoyu Xu,Xingyu Hu,Suru Liu,Yao Mai,Xinzhi Tan,Xiaofan Su,Mingyan Jiang,Wei Tang,Weidong Tian,Li Xie
Purpose A synergistic antibacterial system employing photocatalytic performance and low-temperature photothermal effect (LT-PTT) with the potential for infectious skin wound healing promotion was developed.Methods Ag/Ag2O was synthesized with a two-step method, and its physicochemical properties were characterized. After its photocatalytic performance and photothermal effect were evaluated under 0.5 W/cm2 808 nm NIR laser irradiation, its antibacterial activities in both planktonic and biofilm forms were then studied in vitro targeting Staphylococcus Aureus (S. aureus), and the biocompatibility was tested with L-929 cell lines afterward. Finally, the animal model of dorsal skin wound infection was established on Sprague-Dawley rats and was used to assess infectious wound healing promotion of Ag/Ag2O in vivo.Results Ag/Ag2O showed boosted photocatalytic performance and local temperature accumulation compared with Ag2O when exposed to 0.5 W/cm2 808 nm NIR irradiation, which therefore endowed Ag/Ag2O with the ability to kill pathogens rapidly and cleavage bacterial biofilm in vitro. Furthermore, after treatment with Ag/Ag2O and 0.5 W/cm2 808 nm NIR irradiation, infectious wounds of rats realized skin tissue regeneration from a histochemical level.Conclusion By exhibiting excellent NIR-triggered photocatalytic sterilization ability enhanced by low-temperature photothermal effect, Ag/Ag2O was promising to be a novel, photo-responsive antibacterial agent.
研究领域:
生物医学工程
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材料科学
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微生物学
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DOI
PubMed
高影响因子
TALANTA
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2024
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IF 5.6
Tao Gai,Jiaolai Jiang,Shaofei Wang,Ling Zhang,Yiming Ren,Zhen Qin,Qian Wu,Jun Zhang,Junsheng Liao
Uranium is an essential nuclear material in civilian and military areas; however, its extensive application raises concerns about the potential safety issues in the fields of environmental protection and nuclear industry. In this study, we developed an Ag/Ag 2 O–COF (covalent-organic framework) composite SERS substrate to detect uranyl ions (UO 2 2+ ) in environmental aqueous solutions. Herein, the strong SERS effect of uranyl adsorbed in Ag/Ag 2 O composite and the high adsorption efficiency of COF TpPa-1 were combined to realize the trace detection of uranyl ions. This method displayed a linear range of 10 −8 mol L −1 to 10 −6 mol L −1 with the detection limit of 8.9 × 10 −10 mol L −1 for uranyl ions. Furthermore, common metal cations and oxo-ions hardly affected the SERS detection of uranyl, which is helpful for the trace analysis of uranyl in natural water samples. Although the proposed strategy is deployed for uranyl detection, the reusable and high-efficiency system may be expanded to trace detection of other substance with Raman activity.
研究领域:
分析化学
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环境科学
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核科学
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DOI
PubMed
高影响因子
RSC Advances
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2015
·Vol. 6
·期 4
·3186-3197
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IF 3.84
Zhifeng Jiang,Jimin Xie
Novel visible-light-driven Ag/Ag2O@g-C3N4 (AAC) hybrid materials were synthesized successfully via a green, facile hydrothermal treatment approach by reducing AgNO3 using carbon nanodots as reducing agent for the first time. Natural leaves were used as precursors to prepare carbon nanodots. By adjusting the feed mass ratio of AgNO3 to carbon nanodots, the average diameter of Ag/Ag2O can be modulated from 8 to 33 nm. The effects of Ag/Ag2O deposition on the optical and photocatalytic performance of AAC in the degradation of rhodamine B (RhB) under visible light irradiation were systematically investigated. It was found that the Ag/Ag2O content greatly influences the photocatalytic activity of AAC nanocomposites. A suitable amount of Ag/Ag2O in the AAC system could obtain the best photocatalytic activity. The experimental results indicated that all the AAC nanocomposites showed higher photocatalytic activities compared with that of pure g-C3N4. The remarkable visible-light photocatalytic activity of AAC heterostructures could be attributed to their absorption in the visible region and low recombination rate of the electron–hole pairs because of the heterojunction formed between Ag2O and g-C3N4. In addition, Ag nanoparticles are believed to play an essential role in affecting the photoreactivity because they are able to trap electrons, further separate the electron–hole pairs, and prolong the life of electron–hole pairs. In other words, it can be concluded that the increased photocatalytic activity of AAC was attributed to the synergic effect between g-C3N4, Ag2O and Ag. It is believed that the present work could render useful information for steering the design and application of noble nanoparticle loaded g-C3N4-based heterojunction composites with high photocatalytic activity.
研究领域:
材料科学
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环境科学
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2020
·Vol. 55
·期 25
·11310-11324
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IF 3.553
Ren Hai-Tao,Han Jing,Li Ting-Ting,Liang Yu,Jing Meng-Zhen,Jiang Si-Meng,Lin Jia-Horng,Lou Ching-Wen
Visible light response PAN@Ag–Ag 2 O/TiO 2 (PAN@AT) nanofibers with different mass ratios between Ag–Ag 2 O and TiO 2 were synthesized via a facile electrospinning technique and pH-induced precipitation reaction. X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscope analyses manifest the formation of Ag–Ag 2 O/TiO 2 heterojunctions, and Ag–Ag 2 O/TiO 2 nanoparticles are evenly distributed on PAN nanofibers. The fabricated nanofibers show a highly photocatalytic performance toward As(III) oxidation under visible light, and the conversion is 92.1% after 120-min reaction at pH 5.0 in the system of PAN@AT4. Furthermore, conversion of As(III) can retain 88.6% of the original activity after repeating four cycles, indicating the good recyclability of PAN@AT4 nanofibers. Quenching experiments and electron spin resonance spectra analysis further demonstrate that the predominate active species for As(III) oxidation by PAN@AT4 are h + and · OH. The enhanced catalytic activity of PAN@AT4 is therefore ascribed to the formation of Ag–Ag 2 O/TiO 2 heterojunctions on PAN surface and the efficient separation of photoinduced electron–hole pairs. This study provides a new material to oxidize reducing pollutants [such as As(III)] and also sheds light on the fabrication of recyclable photocatalysts.
研究领域:
材料科学
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环境工程
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纳米技术
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光化学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Songshan Jiang,Lin Xu,Fan Wu,Rui Wen,Meiling Yang,Bai He,Wei Xiong,Huan Yi
The development of stable and efficient MOF-based photocatalysts is essential for the treatment of high-strength dye wastewater. In this study, Ag/Ag 2 O@MOF-808 surface heterojunction photocatalysts were synthesized by a low-temperature impregnation calcination method. Comprehensive structural analyses (XRD, FT-IR, SEM, TEM, BET, H 2 -TPR, XPS) confirmed successful silver loading without damaging the MOF-808 framework. By adjusting the calcination temperature, both Ag 0 and Ag 2 O were introduced to form surface heterojunctions with MOF-808. UV–vis DRS and valence band XPS showed that Ag 2 O reduced the band gap and valence band position, improving light absorption and charge separation. The optimized catalyst (10 wt% Ag, 150 °C) achieved 98.1 % degradation of Rhodamine B (25 mg/L) under UV light within 60 min and maintained 88.8 % efficiency (within 180 min) at 100 mg/L. The catalyst exhibited excellent reusability with 0.417 % Ag + leaching and over 73 % activity retention after four cycles. Radical scavenging experiments identified superoxide radicals as the dominant reactive species. The enhanced performance is attributed to the synergistic effect of Ag 2 O as the active phase, Ag 0 as a conductive bridge, and MOF-808 as a stable support. This work offers a controllable, oxidant-free strategy for efficient photocatalytic degradation of hazardous dyes in wastewater.
研究领域:
材料科学
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环境化学
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光催化
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废水处理
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金属有机框架材料（MOFs）
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DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2020
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IF 3.442
Xiuling Xue,Xiuwen Gong,Xiaoyi Chen,Bor-Yann Chen
In recent years, environmental pollution caused by volatile organic compounds (VOCs) has posed a great challenge to environmental protection. This first-attempt study provided a novel facile chemical precipitation-reduction method to construct Ag/Ag 2 O@TiO 2 (A/AO@TO) photocatalyst for the removal of gaseous toluene. The introduction of Ag in the presence of NaBH 4 with N 2 purging inhibited the passivation of Ag 2 O and thus enhanced the stability of A/AO@TO. A/AO@TO exhibited outstanding photocatalytic performance toward gaseous toluene under different light sources like UV light , simulated sunlight and natural light, which were 99.3%, 48.3% and 28.5%, respectively. The superior photocatalytic performance could be attributed to the synergy effect of p-n heterojunction between Ag 2 O and TiO 2 and the surface plasmon resonance (SPR) effect of Ag, which facilitate the separation of charge carriers and thus suppress the recombination rate of them, and enhance the light response. The active species like ·OH, ·O 2 − and h + were contributed to the excellent photocatalytic performance. The study provided a new method for the fabrication of A/AO@TO photocatalyst and introduce p-n scheme A/AO@TO as a feasible natural sunlight photocatalyst for further applications.
研究领域:
环境科学
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材料科学
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2018
·Vol. 44
·期 7
·4227-4243
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IF 1.674
Deng Anquan,Zhu Yufu
TiO 2 /SiO 2 /Ag/Ag 2 O and TiO 2 /Ag/Ag 2 O nanocomposite spheres have been synthesized via a low-temperature hydrothermal method using SiO 2 spheres as templates, combined with a light-induced reduction method and a hydrogen peroxide oxidation process. Scanning electron microscopy, energy-dispersive X-ray and X-ray diffraction analyses have demonstrated that Ag and Ag 2 O nanoparticles were successfully deposited on the surfaces of TiO 2 /SiO 2 nanocomposite spheres and porous TiO 2 nanospheres forming nanoheterojunctions. The photocatalytic experiment results reveal that all the as-prepared catalysts possess improved photocatalytic activities compared with P25 nanoparticles. Both TiO 2 /SiO 2 /Ag/Ag 2 O and TiO 2 /Ag/Ag 2 O nanocomposite spheres exhibit excellent photocatalytic performances, which can be attributed to the synergistic effects of different kinds of nanoparticles. The synergistic mechanism of these nanoparticles is also discussed in detail.
研究领域:
材料科学
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环境科学
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高影响因子
CHEMICAL PHYSICS
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2024
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IF 2
Xing-Fei Guo,Quan Li,Hai-Tao Ren,Jing Wang,Xu Han
Mesoporous TiO 2 with a homogeneous Bi-Ag bimetallic distribution (Bi@Ag@MTs) can be obtained by calcination of a titanium-based metal organic framework (MOF, MIL-125) with Bi and Ag loading and applied to the photocatalytic reduction of nitrate using formic acid as a hole scavenger. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM) and energy dispersive spectrometer (EDS) analyses show that Ag(I) and Bi(III) are present in MTs as fine clusters and Bi@Ag@MTs have a specific pancake structure, which provides a good carrier for photocatalytic reaction. The contents of Ag and Bi in Bi@Ag@MTs can be up to 2.28 wt% and 0.54 wt% analysed by Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES). Under UV irradiation, Bi@Ag@MTs(0.2,0.4) showed a high reduction rate (3.28 h −1 , 4.2 times that of P25), high conversion (100 %, 1.3 times that of P25) and high N 2 selectivity (89.2 %, 2.1 times that of P25) for nitrate reduction. In addition, Bi@Ag@MTs(0.2,0.4) showed good reusability, with the respective NO 3 − conversion and N 2 selectivity still reaching 82.2 % and 78.0 % after four cycles. X-ray photoelectron spectroscopy (XPS) analysis showed that under UV irradiation, part of Ag(I) would be reduced to Ag 0 , and the formed Ag-Ag 2 O structure helped to improve the photocatalytic activity of the catalyst. This preparation strategy provides assistance in the design of photocatalytic materials with significant activity and durability for nitrate reduction.
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
MICROPOROUS AND MESOPOROUS MATERIALS
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2016
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IF 3.349
Mingming Zou,Honghong Liu,Lu Feng,Fengqiang Xiong,Tiju Thomas,Minghui Yang
A simple solvothermal approach with post-calcination is used to obtain (Ag, Ag 2 O) co-loaded TiO 2 microspheres with high specific surface area (43.8 m 2 g -1 ) and desirable visible light photocatalytic degradation (64% after 2 h visible light irradiation). Generally, N-doping of TiO 2 via nitridation using NH 3 improves the visible light absorption property of material. However, nitridation of (Ag, Ag 2 O) co-loaded TiO 2 results in a deleterious impact on the photocatalytic performance (around 20% after 2 h visible light irradiation). This is because nitridation of Ag-Ag 2 O-TiO 2 results in (a) reduction of Ag 2 O to Ag and (b) Ag agglomeration and grain growth on TiO 2 particles. These results in fact imply that in as-synthesized (Ag, Ag 2 O) co-loaded TiO 2 systems, local surface plasmonic resonance (associated with of 5–12 nm Ag particles) aids in enhanced broad band visible light absorption; furthermore the heterojunction between TiO 2 and Ag 2 O improves efficiency with which photogenerated carriers become available for photocatalysis . In all cases we show through selective radical quenching experiments that singlet oxygen is the primary reason for the dye degradation observed.
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 ELECTROANALYTICAL CHEMISTRY
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2016
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IF 2.822
Yan Wang,Binbin Huang,Wanlin Dai,Jianshan Ye,Bin Xu
Ag/Ag 2 O-loaded poly(sodium4-styrenesulfonate) (PSS) functionalized reduced graphene oxide (rGO) composite (Ag/Ag 2 O-PSS-rGO) with high catalytic activity was synthesized for sensitive determination of capsaicin . The prepared composite was characterized by Transmission Electron Microscopy (TEM) and X-ray Photoelectron Spectroscopy (XPS). The obtained images revealed the good distribution of Ag/Ag 2 O on the PSS-rGO and confirmed the successful synthesis of the nanocomposite . Adsorptive stripping voltammetry (AdsSV) and differential pulse stripping voltammetry (DPSV) were used to study the electrochemical performance of the prepared sensor, and showed excellent electro-catalytic activity to the redox reaction of capsaicin due to the synergistic effect between Ag/Ag 2 O and PSS-rGO. Under the optimized conditions, the linear range of capsaicin was found to be 1.0–60 μM with a detection limit of 0.40 μM (S/N = 3).
研究领域:
分析化学
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材料科学
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食品科学
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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）