Bioactive Materials
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2020
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IF 8.724
Yingde Xu,Xiangmei Liu,Yufeng Zheng,Changyi Li,Kelvin Wai Kwok Yeung,Zhenduo Cui,Yanqin Liang,Zhaoyang Li,Shengli Zhu,Shuilin Wu
Both phototherapy via photocatalysts and physical puncture by artificial nanostructures are promising substitutes for antibiotics when treating drug-resistant bacterial infectious diseases. However, the photodynamic therapeutic efficacy of photocatalysts is seriously restricted by the rapid recombination of photogenerated electron–hole pairs. Meanwhile, the nanostructures of physical puncture are limited to two-dimensional (2D) platforms, and they cannot be fully used yet. Thus, this research developed a synergistic system of Ag 3 PO 4 nanoparticles (NPs), decorated with black urchin-like defective TiO 2 (BU–TiO 2-X /Ag 3 PO 4 ). These NPs had a decreased bandgap compared to BU-TiO 2-X , and BU-TiO 2-X /Ag 3 PO 4 (3:1) exhibited the lowest bandgap and the highest separation efficiency for photogenerated electron–hole pairs. After combination with BU-TiO 2-X , the photostability of Ag 3 PO 4 improved because the oxygen vacancy of BU-TiO 2-X retards the reduction of Ag + in Ag 3 PO 4 into Ag 0 , thus reducing its toxicity. In addition, the nanospikes on the surface of BU-TiO 2-X can, from all directions, physically puncture bacterial cells, thus assisting the hybrid's photodynamic therapeutic effects, alongside the small amount of Ag + released from Ag 3 PO 4 . This achieves synergy, endowing the hybrid with high antibacterial efficacy of 99.76 ± 0.15% and 99.85 ± 0.09% against Escherichia coli and Staphylococcus aureus , respectively, after light irradiation for 20 min followed by darkness for 12 h. It is anticipated that these findings may bring new insight for developing synergistic treatment strategies against bacterial infectious diseases or pathogenic bacterial polluted environments.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Silong Wang,Yan Wang,Jinquan Wan,Yongwen Ma,Zhicheng Yan,Guihua Zhang
With high redox ability of electrons and holes, Z-scheme heterojunction is a promising composite structure in the photocatalysis. However, it is challenging to inhibit the recombination of carriers by Z-scheme transfer. Herein, a novel Ag 3 PO 4 /AgBr/Ti 3 C 2 Tx hybrid with dual channel carrier transfer structure was fabricated. Ti 3 C 2 Tx not only serves as a template for growth of Z-scheme Ag 3 PO 4 /AgBr, but also can be used to accommodate holes transferred from Ag 3 PO 4 and AgBr. The first channel is consisted of Z-scheme transfer of carriers in Ag 3 PO 4 /AgBr. And the hole transfer from the AgBr valence band to Ti 3 C 2 Tx constitutes the second channel, which avoids directly carrier recombination in AgBr valence band. Dual channel carrier transfer pathway was proved by in situ irradiated X-ray photoelectron spectroscopy (ISI-XPS). After Ti 3 C 2 Tx was introduced, the quantum efficiency of Ag 3 PO 4 /AgBr increased from 10.59% to 12.50% with reducing Cr(VI), indicating an increase in carrier utilization. The improvement of the degradation efficiency of rhodamine B from 80.77% to 94.72% is benefited from the enhanced quantum efficiency. The dual channel carrier transfer heterojunctions design provides a new idea for constructing an efficient composite photocatalytic structure.
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MOLECULES
·
2023
·Vol. 28
·期 6
·2647
·
IF 4.6
Peng Wang,Xu Han,Xianhong Zheng,Zongqian Wang,Changlong Li,Zhiqi Zhao
In order to improve the photocatalytic performance of g-C3N4, the g-C3N4/Ti3C2/Ag3PO4S-type heterojunction catalyst was prepared by electrostatic assembly method, and then the g-C3N4/Ti3C2/Ag3PO4/PAN composite nanofiber membrane was prepared by electrospinning technology. The morphology and chemical properties of the nanofiber membrane were characterized by SEM, FTIR, and XRD, and the photocatalytic degradation of tetracycline hydrochloride (TC) in water by the nanofiber membrane was investigated. The results showed that g-C3N4/Ti3C2/Ag3PO4could be successfully loaded on PAN and uniformly distributed on the surface of composite nanofiber membrane by electrospinning technology. Increasing the amount of loading and catalyst, lowering the pH value and TC concentration of the system were conducive to the oxidation and degradation of TC. The nano-fiber catalytic membrane had been recycled five times and found to have excellent photocatalytic stability and reusability. The study of catalytic mechanism showed that h+, •OH and •O2−were produced and participated in the oxidation degradation reaction of TC, and •O2−plays a major role in catalysis. Therefore, this work provides a new insight into the construction of high-performance and high-stability photocatalytic system by electrospinning technology.Keywords:photocatalytic;PAN nanofiber membrane;degradation;tetracycline;heterojunction
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2019
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IF 3.218
Malik Saddam Khan,Hafsa Ameer,Asghar Ali,Wenjuan Zhu,Xiaojian Li,Lei Yang,Huan Wang,Ruiqing Feng,Qin Wei
A label-free electrochemiluminescence (ECL) sensor having high sensitivity was operated for detection of prostate specific antigen (PSA) by using silver/silver orthophosphate/graphene oxide composites (Ag/Ag 3 PO 4 /GO) as antibody carriers and sensing platform. Firstly, nanoparticles of Ag 3 PO 4 were employed as luminescent materials for solid-state ECL detection and to propose possible luminescence route in this study. GO, having the ultrahigh specific surface area and superior conductivity, was utilized as a loading matrix for nanoparticles of Ag 3 PO 4. It was employed not only to contribute for the enhancement of electrons transfer for the whole ECL system, but also further improvement of the sensitivity of the immunosensor. Given that the spectacular biocompatibility of silver nanoparticles (Ag NPs) was used to immobilize PSA antibody (anti-PSA) via the covalent coupling between silver and amino group, to improve immunosensor sensitivity. The proposed sensing platform presented tremendous cathodic ECL performance and better response to the PSA. Under optimized experimental conditions, the proposed immunosensor displayed a calibration range of 0.001–80 ng/mL and low detection limit of 0.3 pg/mL (S/N = 3) for PSA determination. Featuring encouraging selectivity, repeatability, and stability, the fabricated Ag/Ag 3 PO 4 /GO is anticipated to glare novel ECL biosensor platform for PSA and other biomarkers detection in the real sample.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Yijun Wang,Mei Li,Zhiliang Jin,Shiyong Xu,Ziyu Li,Meijuan Ding
Coal tar pitch-based carbon quantum dots (CQDs) were meticulously prepared via ball milling. Ag 3 PO 4 /Ni-MOF/CQDs composites were synthesized through an in-situ precipitation method, and their performance as composite catalysts for the photocatalytic degradation of phenol was thoroughly investigated. Among these composites, Ag-Ni-70/CQDs-0.45 emerged as the most effective catalyst, achieving a remarkable degradation rate of 98% for 10 mg/L phenol within just 30 min, with a corresponding rate constant of 0.0620 min −1 . Notably, the photocatalytic degradation of phenol exhibited robust activity across a spectrum of pH levels, different water matrices, and varying concentrations of anions (SO 4 2− , Cl − , CO 3 2− , HPO 4 2− and HCO 3 − ). Furthermore, after undergoing 4 cycles of reaction, the catalyst demonstrated commendable stability. The outcomes of free radical capture experiments revealed that the primary active species involved in the degradation process were ·OH and h + . The electron transport pathways were analyzed based on the band gap structure of the catalyst, and a possible degradation mechanism was proposed. Upon the combination of Ni-MOF and Ag 3 PO 4 , the alteration of metal-O bonds facilitated the formation of a tightly bonded interface, thereby establishing a Z-scheme heterojunction. The introduction of CQDs as an electron transport medium accelerated electron transfer, mitigated the recombination of photogenerated charges, and thereby enhanced the photocatalytic performance of the heterostructure.
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JOURNAL OF NANOPARTICLE RESEARCH
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2014
·Vol. 16
·期 11
·1-10
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IF 2.278
Yao Yang Rong,Huang Wan Zhen,Zhou Huan,Cui Xia,Zheng Yi Fan,Song Xu Chun
A core–shell nanostructured magnetic photocatalyst Fe 3 O 4 @SiO 2 @Ag 3 PO 4 with a grain size ranging from 200 to 400 nm was prepared via a facile and effective method. The as-prepared products were characterized using X-ray diffraction, high-angle annular dark field-scanning transmission electron microscopy, energy-dispersive spectroscopy, and UV–Vis diffuse reflectance spectra. The photocatalytic activity was evaluated by the degradation of 10 −5 M RhB solution under visible light irradiation with a cut-off filter ( λ ≥ 420 nm). The results showed that nearly 100 % color removal efficiency was achieved in 45 min with the presence of Fe 3 O 4 @SiO 2 @Ag 3 PO 4 photocatalyst. Furthermore, it can be easily recollected from the solution by magnetic separation and efficiently recycled without major loss of activity due to its superior magnetic responsibility and extremely high reusability, exhibiting highly potential applications in water purification avoiding the secondary pollution.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Junjie Ma,Yingguan Xiao,Juanrong Chen,Yue Shen,Sisi Xiao,Shunsheng Cao
Exploring high-performance photocatalysts still remains a big challenge due to poor charge separation efficiency. Herein, we prepare a novel anatase/rutile TiO 2 -Ag 3 PO 4 hollow photocatalyst (A/R-TiO 2 -Ag 3 PO 4 ) for addressing this challenge. Microstructural characterization and photoelectric measurements confirm that the synergy of hollow structure and dual-heterojunction can provide abundant active sites and boost efficient charge separation through dual-pathway charge transfer mechanism. The A/R-TiO 2 -Ag 3 PO 4 photocatalyst exhibits the highest photocurrent density (15.25 µA cm −2 ), which is 8.4 and 5.2 times than that of A-TiO 2 -Ag 3 PO 4 (1.82 µA cm −2 ) and P25-Ag 3 PO 4 (2.93 µA cm −2 ), respectively. Photo-degradation experiment shows that A/R-TiO 2 -Ag 3 PO 4 presents a high degradation percentage (98.7 %) of thiamethoxam (THX) within 30 min, which is 1.45 and 1.23 times than that of A-TiO 2 -Ag 3 PO 4 (68.1 %) and P25-Ag 3 PO 4 (80.7 %), respectively. Furthermore, the degradation percentage of THX by A/R-TiO 2 -Ag 3 PO 4 is as high as 96.4 % after seven successive cycles, indicating excellent cycling stability. Therefore, this work provides a new insight into exploring other high-performance photocatalysts by combining hollow structure and dual-heterojunction.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Bing Wang,Zhuo Li,HaiXia Ma,JianBo Zhang,LinYu Jiao,Hong Hao,EnZhou Liu,Long Xu,Chen Wang,Bo Zhou,XiaoXun Ma
Achieving efficient photocatalytic oxidation of antibiotics represents a key challenge, which can be overcome by developing dynamic attachment strategies between supramolecular and semiconducting catalysts. Herein, we utilize hydrogen bonding and van der Waals forces to dynamically connect self-assembled SubPc-1 dimers and Ag 3 PO 4 semiconductor catalysts for photocatalytic oxidation of antibiotics, which is systematically demonstrated by spectroscopic measurements and theoretical calculations. The degradation efficiency of SubPc-1/Ag 3 PO 4 supramolecular nanoarrays for tetracycline and oxytetracycline is 93.54% and 94.9% under 30 min visible light irradiation, respectively. The superior activity and excellent stability of supramolecular arrays are demonstrated to be more attributed to the dynamic hydrogen bonding and van der Waals connection between SubPc-1 and Ag 3 PO 4 . This work reveals a potential for preparing specific S -scheme heterojunction photocatalysts based on dynamic attachment supramolecular and semiconductor catalysts.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Jinming Ma,Huizhen Deng,Zhe Zhang,Lexin Zhang,Zhihui Qin,Yaru Zhang,Lili Gao,Tifeng Jiao
In this study, a series of Ag 3 PO 4 /PPy/PANI ternary composite catalysts were fabricated by adjusting the mixed solution of pyrrole and aniline with different volume ratios of 4:1, 3:2, 1:1, 2:3, and 1:4, and combining with the in-situ synthesis method. The synthesized Ag 3 PO 4 /PPy/PANI nanoparticles were examined by XRD , SEM, TEM and EDX , Raman spectroscopy . When the ratio of pyrrole and aniline is 1:1, the polymerized PPy/PANI acted as the supporting matrix to effectively immobilize and prevent the aggregation of Ag 3 PO 4 nanoparticles. The catalytic performances of the Ag 3 PO 4 /PPy/PANI composites were confirmed for reduction of 2-nitroaniline (2-NA) and 4-nitrophenol (4-NP) in the presence of NaBH 4 at room temperature by UV–vis spectroscopy. Results showed that the catalytic reduction effect of the Ag 3 PO 4 /PPy/PANI (1:1) on 2-NA is obviously better than that on 4-NP, which followed the pseudo-first-order kinetic, and the corresponding rate constants are 0.0053 min −1 and 0.022 min −1 , respectively, indicating that it has potential application in wastewater treatment in industries.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Tao Cai,Wengao Zeng,Yutang Liu,Longlu Wang,Wanyue Dong,Hui Chen,Xinnian Xia
Silver orthophosphate (Ag 3 PO 4 ) based semiconductor photocatalysis have been widely investigated for environmental purification due to its strong oxidation ability. Yet, its poor photostability and low photoactivity hamper its extensive applications. Here, an inorganic-organic Z-scheme photocatalytic system for antibiotic degradation demonstrated high photoactivity and stability through the use of Ag 3 PO 4 /Perylene diimide organic supermolecule (PDIsm). The apparent rate constant of tetracycline hydrochloride (TC-H) degradation with Ag 3 PO 4 /PDIsm was 1.5 times that of Ag 3 PO 4 and 8 times that of PDIsm. The photocatalytic activity of Ag 3 PO 4 /PDIsm toward TC-H still kept 65 % after four reuses, while pure Ag 3 PO 4 only kept 22 %. We revealed that this high photoactivity and photostability arisen from the efficient carriers separation and the formation of direct Z-scheme junction. Importantly, this Z-scheme electron transfer pathway was confirmed by thorough experimental study and density functional theory (DFT) calculation. This work demonstrated the significant potential of Ag 3 PO 4 -based inorganic-organic Z-scheme photocatalyst in environmental remediation.
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高影响因子
CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Hua Jin,Lin Zhu,Xinyuan Xu,Xiaoyang Yu,Xiaoshu Qu,Zhigang Liu,Yanyan Yang,Yan Gao,Qingling Wei
Herein, we investigated the synergistic degradation of p -chlorophenol by a Ag 3 PO 4 /Fe 3 O 4 /graphene oxide visible light – peroxydisulfate coupled system, probed the effects of catalyst and peroxydisulfate dosage, pH, operating mode, and coexisting substances, identified decomposition intermediates, and proposed plausible degradation pathways. The advantages of the coupled system, namely reduced agent dosage and efficient and thorough degradation, justified the involvement of a precious metal (Ag), while mechanistic investigations suggested the importance of the peroxydisulfate peroxo bond and electron transfer between multivalent metal catalyst components for degradation performance enhancement. Thus, this work facilitates the development of high-efficiency and low-cost combinations of advanced oxidation processes.
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MATERIALS & DESIGN
·
2019
·
IF 5.77
Chao Zhang,Jiameng Wang,Ruifang Chi,Jing Shi,Yongqiang Yang,Xiangyu Zhang
Bacterial infections are closely in correlation with chronic wounds, and overcoming these problems is still challenging. Herein, a polyvinyl alcohol (PVA) hydrogel incorporated with reduced graphene oxide (RGO)/MoS 2 /Ag 3 PO 4 composites is fabricated for highly efficient sterilization during wound healing under light irradiation. RGO/MoS 2 /Ag 3 PO 4 composite is first prepared by a two-step process containing hydrazine reduction and in-situ deposition, then the hybrid hydrogel is prepared using a freeze-thaw cycle method. After doping with RGO/MoS 2 /Ag 3 PO 4 composite, the hydrogel shows better mechanical property and swelling ratio. The hybrid hydrogel also exhibits excellent antibacterial properties against both Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ) under co-irradiation of 660 nm visible light (VL) and 808 nm near-infrared (NIR) light within 10 min because of the synergistic effects rendered by the photodynamic and photothermal antibacterial treatments. The introduction of RGO/MoS 2 /Ag 3 PO 4 composite has no appreciable influence on the cell viability and cell morphology. Importantly, the hybrid hydrogel effectively reduces the bacterial infection-related inflammation during wound healing. Thus, this RGO/MoS 2 /Ag 3 PO 4 -incorporated hydrogel has great potential in antibacterial wound healing dressing.
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