ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Yuyu Bu,Zhuoyuan Chen
Polyaniline/silver/silver phosphate (PANI/Ag/Ag3PO4) composite was prepared by in situ depositing silver phosphate (Ag3PO4) nanoparticles on the surface of polyaniline (PANI). The best photocatalytic Rhodamine B degradation performance is obtained by the 20 wt % PANI/Ag/Ag3PO4 composite, which is approximately 4 times higher than that of pure Ag3PO4. Meanwhile, the photocatalytic stability of Ag3PO4 is significantly improved by introducing PANI into the PANI/Ag/Ag3PO4 composite. The dramatic promotion of the photocatalytic degradation performance and the photocatalytic stability can be attributed to the formation of a heterojunction electric field between PANI and Ag3PO4, which is approximately 90 mV and points from Ag3PO4 to PANI. The existence of this electric field can dramatically enhance the separation efficiency of the photogenerated electron–hole pairs, accelerate the transfer of photogenerated holes from Ag3PO4 to PANI and therefore inhibit the self-oxidation of Ag3PO4.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS SCIENCE FORUM
·
2014
·
IF 0
Jian Wang,Ming Hui Zhao,Yu Bao Li,Yi Zuo,Bin Sun,Jia Xing Jiang,Qin Zou,Ji Dong Li
Elimination of microorganisms from the root canal system and the prevention of subsequent reinfection are of importance for long-term endodontic treatment. The application of a sealer with antibacterial properties may reduce the reinfection and improve the success rate of the root filling treatment. The aim of this paper is to evaluate the antibacterial properties of a novel root canal sealer based on injectable self-curing polyurethane with silver phosphate (PU/Ag3PO4). The antibacterial abilities were assessed by direct contact test, anti-bacterial adhesion assay and bacteriostatic rate test. The results show that the fabricated PU/Ag3PO4 sealer can completely inhibit the bacterial growth and prevent bacterial adhension effectively. The bacteriostatic rate is 93.6% and 98.1% when the bacteria incubated with PU/Ag3PO4 sealer for 7 and 24h respectively. The strong antibacterial abilities suggest that PU/Ag3PO4 sealer has great application potential in the field of root canal filling.Key words: Root canal sealer, polyurethane, silver phosphate, antibacterial properties, direct contact test
研究领域:
牙科学
·
材料科学
✓ 已验证
DOI
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Zehao Wang,Xuejun Xu,Zhichun Si,Liping Liu,Yuxiang Liu,Yonghong He,Rui Ran,Duan Weng
MoS 2 /Ag 3 PO 4 heterojunction photocatalysts have attracted great attention in dye degradation and water oxidation, in which Z-scheme plays a critical role in the catalytic performance as a result of energy band structure alignment between MoS 2 and Ag 3 PO 4 . Creating metal sites at composite interfaces as recombination centers of photo-generated electrons from conduction band (CB) of Ag 3 PO 4 and holes from valence band (VB) of MoS 2 is an effective strategy to enhance the charge separation efficiency and photocatalytic performance. Strong coupled MoS 2 /Ag dots/Ag 3 PO 4 ternary heterojunction photocatalysts were fabricated by one-pot precipitation method, in which highly dispersed Ag dots are located at the MoS 2 /Ag 3 PO 4 interfaces and MoS 2 is bonded with PO 4 3- in the form of Mo-O-P. The fabricated MoS 2 /Ag dots/Ag 3 PO 4 photocatalyst presents a 2.8-fold enhancement of photocatalytic activity of water oxidation compared to that of pristine Ag 3 PO 4 , which is achieved for the first time. The great enhancement of photocatalytic performance can be ascribed to the improved Z scheme mechanism with strongly coupled MoS 2 /Ag dots/Ag 3 PO 4 ternary interfaces, in which highly dispersed Ag dots serve as efficient recombination centers resulting in the improved separation of photo-generated holes and electrons of Ag 3 PO 4 as well as photocatalytic activity of oxygen evolution.
研究领域:
材料科学
·
环境科学
·
光催化
✓ 已验证
DOI
高影响因子
Water
·
2025
·Vol. 17
·期 11
·1594
·
IF 3
Xiaoze Yin,Yuxin Xiao,Chaoyue Wu,Jinnan Wang
Although Ag3PO4possessed high quantum yield (approximately 90%) and strong oxidation potential, its practical application was limited due to serious photocorrosion and inadequate stability. To improve the anti-photocorrsion ability, carbon nitride quantum dots (CNQDs) were loaded on octopod-like Ag3PO4with {110}-faceted rhombic dodecahedrons. The CNQDs stabilized the high-energy {110} facets via carboxylate-mediated interactions, facilitating oriented assembly into 3D octopod configurations. More importantly, a Z-scheme heterojunction was constructed between CNQDs and Ag3PO4for electrons transfer from Ag3PO4to CNQDs, which could not only maintain strong redox potentials but also suppress carrier recombination. The 12.5%CNQDs/Ag3PO4composite achieved a more than 90% removal of methyl orange within 13 min. Radical trapping and EPR analyses indicated that holes of Ag3PO4played a dominant role in organics degradation. In addition, •O2−, which was generated from the O2reduction by photogenerated electrons of CNQDs, also participated in the degradation of organics. This work provides a facet-controlled heterojunction design strategy, leveraging quantum-confined CNQDs to enhance charge kinetics and molecular oxygen activation.
研究领域:
材料科学
·
环境化学
·
纳米技术
·
光催化
·
表面科学
✓ 已验证
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2019
·Vol. 29
·期 4
·1154-1159
·
IF 1.637
Tang Qingjie,Wu Wenrong,Zhang Huoli,Luo Junzhi,Zhang Bingyao,Guo Xiangkun,Jia Jianbo,Cao Jianliang
The cauliflower-like AgBr/Ag 3 PO 4 /sulfonated polystyrene sphere (SPS) heterojunction photocatalyst was prepared using wastewater containing silver ion and SPS as raw materials via in situ ion change method. The AgBr/Ag 3 PO 4 /SPS photocatalyst was characterized by field emission scanning electron microscopy, X-ray diffraction and UV–Vis diffuse reflectance spectra (UV–Vis DRS). The results showed that AgBr nanoparticles and Ag 3 PO 4 nanoparticles are highly dispersed on the surface of sulfonated polystyrene. And the heterogeneous junction structures are also formed between AgBr and Ag 3 PO 4 , which is benefit for the separation of photogenerated electrons and holes. Hence, the AgBr/Ag 3 PO 4 /SPS photocatalyst had an excellent activity for photocatalytic degradation of rhodamine B (RhB) in water under visible light irradiation. The cyclic test results showed that the AgBr/Ag 3 PO 4 /SPS photocatalyst also had a good stability.
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
Science China-Technological Sciences
·
2020
·Vol. 64
·期 4
·785-792
·
IF 2.302
Ge Bo,Zhang YuLing,Zhang TingXiao,Ren GuiNa,Li WenZhi,Zhao Hui
Various forms of pollutants discharged from industrial and life; how to treat the opposite water-soluble pollutants at the same time is a challenge. Here, a superhydrophobic BiOBr/Ag 3 PO 4 fabric (SH fabric) bulk material was prepared aiming at the diversity of pollutants. Water (WCA=160°) and oil contaminants (spread) have different wetting behavior on fabric surfaces. The high recovery efficiency for oil pollutants was achieved by using the selective oil removal property of the SH fabric. Meanwhile, the pollutants in the aqueous phase were removed by photocatalyst after oil/water separation. Mechanism analysis demonstrated that the direct Z-type heterojunction formed between BiOBr ( E VB =1.66 eV; E CB =−1.08 eV) and Ag 3 PO 4 ( E VB =3.03 eV; E CB = 0.6 eV). It is worth noting that the SH fabric exhibited good mechanical stability and UV shielding performance, which have potential application in environmental control.
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 COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Guojun Li,Jia Guo,Yangyun Hu,Yanan Wang,Jianbo Wang,Shule Zhang,Qin Zhong
In this study, a novel ternary Z-scheme Graphite-like Carbon Nitride (g-C 3 N 4 )/Silver (Ag)/Silver Phosphate (Ag 3 PO 4 ) photocatalyst was designed and prepared using a two-step method (sodium chloride (NaCl) template-assisted strategy plus selective deposition). Its photocatalysts performance against removing 400 ppm of Nitric Oxides (NOx) was then investigated. We found 50 wt% g-C 3 N 4 /Ag/Ag 3 PO 4 (AP-CN 2:1) catalyst removes up to 74% of NO in 90 min under the illumination of visible light (>420 nm), which is respectively 3.5 and 1.8 times higher than using g-C 3 N 4 or Ag 3 PO 4 , alone. This improved performance was attributed to the formation of Z-scheme g-C 3 N 4 /Ag/Ag 3 PO 4 heterojunction , driven by the built-in electric field across the g-C 3 N 4 /Ag/Ag 3 PO 4 interface. These separated the electron-hole but enhanced the original strong oxidation and reduction performance of related components. The superior performance is also attributed to the improved surface area, enhanced hydrophilicity (H 2 O 2 ) and better visible-light-harvesting capability of the composite compound. More importantly, the AP-CN 2:1 sample maintained a NO removal rate of more than 73% even after four rounds of recycling. The photocatalytic oxidation removal mechanism was evaluated using the radical-capture experiments, electron spin resonance (ESR) and ion-exchange high-performance liquid chromatography (HPLC) analysis. The findings of this work offer a simple but effective design of a highly reactive and practical ternary Z-scheme heterojunction photocatalysts for the removal of toxic NO.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
Zhuanni Yu,Mengmeng Xu,Qiang Wang,Xiaowei Sun,Jing Lan
An efficient semiconductor composite, silver/silver orthophosphate/silver bromide, was successfully synthesized by a facile one-step reduction and ion exchange process. Its crystal structure, morphology, optical property, surface element composition were characterized by X-ray diffraction, scanning electron microscopy, ultraviolet-visible diffuse reflectance spectrometer and X-ray photoelectron spectrometer. The effects of composite proportion and synthesis duration on performances of as-prepared photocatalysts were investigated, and the results showed that Br/P molar ratio of 3 and the synthesis duration of 4 h were the optimum conditions. The radical scavenging experiments indicated that the hole and superoxide radical were the main active species in this reaction system. The Ag/Ag 3 PO 4 /AgBr-3 presented excellent stability and recyclability, maintaining 92% of degradation efficiency after 5 cycles. The good photocatalysis performance could be attributed to the formation of the heterojunction between Ag and Ag 3 PO 4 /AgBr.
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
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Mengmeng Zhang,Yi Huang,Biao Deng,Rongxiang Zhu
To increase active sites, mitigate photo corrosion, expedite electron transfer and suppress the recombination of photogenerated charge carriers, we synthesized a WO 3 @PDA/Ag 3 PO 4 ternary composites using a straightforward method, where PDA served as adhesion interface and electronic transfer bridge. The photocatalytic activity of WO 3 @PDA/Ag 3 PO 4 was assessed by degrading organic pollutants under visible light. The results demonstrated that 0.5 g/L WO 3 @PDA/Ag 3 PO 4 could eliminate 30 mg/L of methyl orange (MO) within 60 min and achieve an 80.7 % degradation rate for moxifloxacin (Mox) within 180 min. After five adsorption-photocatalytic cycles, the WO 3 @PDA/Ag 3 PO 4 maintained a removal efficiency of 95.88 % for MO and 75.56 % for Mox, showcasing its cycling stability. The photocatalytic mechanism of WO 3 @PDA/Ag 3 PO 4 was elucidated through a series of characterizations, which indicated that the Z-type heterojunction formed between WO 3 and Ag 3 PO 4 , along with PDA's electron-conducting ability, provided a strong driving force for the photocatalytic reaction. This study introduces an idea for enhancing the construction of Z-type heterojunctions with PDA as the electron-conducting interface, thereby improving photocatalytic performance.
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
ChemistrySelect
·
2024
·Vol. 9
·期 35
·e202402568
·
IF 1.9
Rui Zhu,Xinglong Li
Graphical A photocatalytic selective oxidation strategy for preparing DFF from HMF is developed, using Ag/Ag 3 PO 4 as the photocatalyst and O 2 as the oxidizing agent. In contrast to previous photocatalytic oxidation strategies for HMF transformation, this catalytic system could efficiently generate 1 O 2 without other ROS under visible light irradiation. DFF would be obtained with 88 % selectivity with the optimal reaction conditions. The synthesis of 2,5-diformylfuran (DFF) through photocatalytic oxidation of 5-hydroxymethylfurfural (HMF) is an attractive approach. In this manuscript, a photocatalytic selective oxidation strategy for HMF was developed, using Ag/Ag 3 PO 4 as the photocatalyst and O 2 as the oxidizing agent. The prepared catalyst was characterized systematically by SEM, XRD, XPS, UV-Vis, PL spectra, and so on. In contrast to previous photocatalytic oxidation strategies for HMF conversion, this catalytic system could efficiently generate 1 O 2 without other reactive oxygen species (ROS) under visible light irradiation. DFF would be obtained with about 90 % selectivity. Moreover, the exclusive formation of 1 O 2 was linked to the more positive conduction band potential (+0.90 eV) of Ag/Ag 3 PO 4 , confirmed by an array of characterization techniques. Additionally, the stability of the catalyst was assessed through cyclic testing and analyses including XRD, and XPS. Nonetheless, this catalytic system could potentially serve as a robust platform for various selective oxidation reactions in the future, due to its exclusive presence of 1 O 2 without the involvement of other ROS.
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Bowen Li,Zhiwen Zhang,Yijing Tang,Liyang Qin,Chengyuan Li,Pengze Li,Ye Song
Titanium dioxide (TiO 2 ) has always attracted much attention in the fields of semiconductors and photocatalysis due to its narrow band gap. Especially because of its excellent photocatalytic performance, its application research in water pollution treatment is extremely extensive. However, most studies have focused on modifying and transforming TiO 2 particles that are difficult to recycle and prone to secondary pollution to achieve better photocatalytic performance. In this paper, regular TiO 2 nanotubes were obtained by conducting secondary anodization on the titanium-based surface through the anodic oxidation method, and the Ag 3 PO 4 /TiO 2 structure was prepared by in-situ method. The results show that the photoelectric response of the TiO 2 oxide film loaded with Ag 3 PO 4 is significantly stronger than that of pure TiO 2 oxide film. Mild annealing (300℃) in an argon atmosphere after loading Ag 3 PO 4 can increase the photocurrent response intensity of the sample by 88 %. Based on the analysis of the results of SEM, TEM and XPS, Ag/Ag 3 PO 4 nanoparticles appeared on the surface of the nanotubes after annealing in an argon atmosphere. Furthermore, the results show that the carrier concentration of annealing at 400 °C is significantly higher than that of annealing at 300 °C, but the photocurrent response intensity is the opposite. This work will provide new inspirations for the modification and improvement of TiO 2 nanotube structures and the enhancement of their photoelectric properties.
研究领域:
半导体材料
·
光催化
·
纳米技术
·
环境修复
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yaxin Liu,Dongzhi Yang,Ting Xu,Yongzheng Shi,Linna Song,Zhong-Zhen Yu
Although silver phosphate (Ag 3 PO 4 ) exhibits high quantum efficiency and intriguing photocatalytic ability, its poor light stability limits its wide application. Herein, structurally stable and porous Ag/Ag 3 PO 4 /reduced graphene oxide microspheres are fabricated with electrostatic spraying, freezing, lyophilizing and crosslinking and used for the first time to remove toxic Cr(VI) ions with high efficiency and durability. Polydopamine serves as both moderate reductant and effective linker for Ag/Ag 3 PO 4 components to distribute well on reduced graphene oxide (rGO) sheets with controlled Ag/Ag 3 PO 4 ratios, endowing the porous microspheres with fast transfer of electrons and enhanced structural stability. Both the heterogeneous junctions of Ag/Ag 3 PO 4 and the conductive rGO sheets accelerate the electron transfer from Ag 3 PO 4 to Ag and rGO, decrease the recombination of electrons and holes and enhance the light stability of Ag 3 PO 4 . In addition, both the photogenerated electrons of Ag 3 PO 4 and the π electrons on rGO sheets reduce Cr(VI). The resulting porous microspheres deliver an excellent visible light photocatalytic efficiency of 0.62 mg min −1 g −1 (quantum yield of 2.37%) for reduction of Cr(VI) under the light intensity of 800 mW cm −2 , and a high removal efficiency of more than 90% of Cr(VI) over 30 h under a continuous photocatalytic removal system. These outstanding performances make the structurally stable and porous microspheres promising for continuous removal of Cr(VI) ions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）