JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2016
·
IF 2.477
Guangshan Zhang,Yanei Xue,Rongjun Su,Qiao Wang,Wen Zhang,Yixing Yuan,Peng Wang
Photocatalysis is an ideal pathway of degradation of emerging contaminants such as endocrine disrupting compounds with least byproducts. This study investigated the synthesis of Zn 0.9 Fe 0.1 S nanoparticles with a one-step microwave irradiation method (MIM) and the photocatalytic degradation of Bisphenol A (BPA) under UV-light irradiation. The results showed that the microwave-assisted synthesis changed the morphology of the catalyst, increased its surface area, shortened the preparation time and improved the activity and longevity of the catalyst in comparison to the traditional hydrothermal method (THM). By tracking the quenching of OH radical, the degradation pathway of BPA by Zn 0.9 Fe 0.1 S photocatalysts was proposed. The effects of reaction solution pH, microwave irradiation time, and power on the catalytic activity were discussed, respectively. The stability and reusability of the catalyst were studied through monitoring dissolved ions release from the catalyst.
研究领域:
环境化学
·
材料科学
·
光催化
·
纳米材料
·
水处理技术
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Shengbo Zhang,Mei Li,Qilong Wu,Hongchen Yang,Jinyu Han,Hua Wang,Xiao Liu
An efficient heterogeneous photocatalytic system for high-purity hydrogen evolution from formate or aldehyde-water solution were developed using IrCp*Cl (Cp* = η 5 -pentamethylcyclopentadienyl) complex anchored onto the robust bipyridine-based organosilica nanotubes as a solid catalyst. This system can be conducted at the room temperature with a visible light (λ > 420 nm) illumination. The heterogeneous molecular photocatalyst displayed much improved catalytic activity and recyclability compared to the analogous homogeneous catalyst, benefiting from the isolated photoactive sites as well as the efficient transport of substrates and products in the nanotube channels. A detailed characterization for the solid catalyst after the reactions by UV/vis, XPS and 13 C CP MAS NMR testified the molecular nature of the active species. This work provides an easy method to construct the heterogeneous molecular photocatalysts for the high-purity hydrogen generation under mild conditions.
研究领域:
无机化学
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材料化学
·
催化化学
·
纳米科技
·
能源化学
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2013
·Vol. 15
·期 37
·15660-15668
·
IF 3.829
Jungang Hou,Chao Yang,Huijie Cheng,Zheng Wang,Shuqiang Jiao,Hongmin Zhu
Highly efficient hydrogen production can be achieved by three-dimensional (3D) architectures of CdS quantum dots (QDs) incorporated in the porous assembly of marigold-like ZnIn2S4 heterostructures coupled with graphene, leading to an efficient electron transfer between them and the enhancement of the ZnIn2S4 photostability. The as-prepared samples were characterized by X-ray diffraction, electron microscopy, Brunauer–Emmett–Teller analysis, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance absorption spectra, and photoluminescence spectra. Especially, 3 wt% CdS QDs decorated ZnIn2S4 heteroarchitectures showed a high rate of H2-production at 1.9 mmol h−1, more 2.7 times than that of ZnIn2S4. The rate was further increased to 2.7 mmol h−1 with a high quantum efficiency of 56% using the 3 wt% CdS QDs decorated ZnIn2S4 composites coupled with 1 wt% graphene (about 4 times higher than that of the pure ZnIn2S4). Moreover, the CdS QDs/graphene/ZnIn2S4 exhibited strong durability due to the high hydrothermal stability of the flower-like structure and the inhibition of CdS leaching owing to its strong interaction with ZnIn2S4. The excellent photocatalytic performance is ascribed to the enhanced light absorption and the improved separation of photogenerated carriers. This finding highlights the validity of 3D semiconductor heterostructures as effective building blocks for exploring efficient visible-light-active photocatalysts.
研究领域:
材料科学
·
光催化
·
纳米材料
·
能源化学
·
半导体物理
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2013
·
IF 2.072
Jun Liang,Huiru Ma,Wei Luo,Shouling Wang
Magnetite submicrospheres with an average size range of 90–490 nm were obtained by a facile polyol process. The effects of reaction conditions on the morphology and static magnetism of magnetite submicrospheres were studied when the reaction time, the concentration of component, and the types of the solvent or surfactant changed. The average size of primary crystals was controlled by changing the concentration of surfactant thus the superparamagnetism was obtained, meanwhile the average size of secondary clusters was tuned by changing the concentration of ferrous precursor FeCl 3 ·6H 2 O. The ratio of ethylene glycol and diethylene glycol , the concentration of NaAC, and the reaction time all exhibited novel effects on the morphology of magnetite submicrospheres facilitating our understanding about the synthesis mechanism. The synthesized magnetite submicrospheres were successfully used for photonic crystal .
研究领域:
材料科学
·
纳米技术
·
磁性材料
·
生物医学工程
✓ 已验证
DOI
高影响因子
Small
·
2022
·Vol. 19
·期 2
·2205353
·
IF 15.153
Fapeng Sun,Wenting Hong,Xu He,Chuanyong Jian,Qiankun Ju,Qian Cai,Wei Liu
β-Ag 2 Te has attracted considerable attention in the application of electronics and optoelectronics due to its narrow bandgap, high mobility, and topological insulator properties. However, it remains a significant challenge to synthesize 2D Ag 2 Te because of the non-layered structure of Ag 2 Te. Herein, the synthesis of large-size, ultrathin single crystal topological insulator 2D Ag 2 Te via the van der Waals epitaxial method for the first time is reported. The 2D Ag 2 Te crystal exhibits p-type conduction behavior with high carrier mobility of 3336 cm 2 V −1 s −1 at room temperature. Taking advantage of the high mobility and perfect electron structure of Ag 2 Te, the Ag 2 Te/WSe 2 heterojunctions are fabricated via mechanical stacking and show an ultrahigh rectification ratio of 2 × 10 5 . Ag 2 Te/WSe 2 photodetector also exhibits self-driven properties with a fast response speed (40 µs/60 µs) in the near-infrared region. High responsivity (219 mA W −1 ) and light ON/OFF ratio of 6 × 10 5 are obtained under the photovoltaic mode. The overall performance of the Ag 2 Te/WSe 2 photodetector is significantly competitive among all reported 2D photodetectors. These results indicate that 2D Ag 2 Te is a promising candidate for future electronic and optoelectronic applications.
研究领域:
凝聚态物理
·
材料科学
·
纳米电子学
·
光电子学
·
半导体器件
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二维材料科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 5
·4997-5007
·
IF 2.914
Zhang Lixin,Rao Lei,Wang Peifang,Guo Xiang,Wang Yuxiong
Herein, we present the preparation of nano-TiO 2 –silicone resin composite films by double liquid phase spray deposition. The films exhibit better adhesion stability and photocatalytic activity under a hydrodynamic erosion condition than conventional nano-TiO 2 composite films. The TiO 2 layer morphology and effective TiO 2 coverage ratio (CR) were affected by the initial curing time (ICT) of the silicone resin, e.g., the increase in an ICT from 10 to 40 min resulted in a CR change from 79.1 to 98.7%. The surface morphology evolution of composite films was studied under a hydrodynamic erosion period of 4 weeks. Obtained results allowed the 4-week evolution to be divided into four stages (pitting, crack pregnant, banded stripping, and surface stripping periods), additionally revealed that the CR of all samples was remained above 65%. The photocatalytic activity of composite films before and after 4-week hydrodynamic erosion was evaluated by rhodamine B degradation experiments. The 4-week erosion only led to the decrease of the photodegradation efficiencies by less than 40% in all cases. Thus, the fabricated TiO 2 –silicone composite films demonstrated excellent durability and photocatalytic activity under the conditions of long-term hydrodynamic erosion, allowing one to conclude that this work paves the way to the fabrication of next-generation photocatalytic materials for industrial applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2019
·Vol. 125
·期 1
·1-11
·
IF 1.784
Deng Senlin,Yang Zebin,Lv Guojun,Zhu Yongqiang,Li Haichao,Wang Fumin,Zhang Xubin
A novel WO 3 nanosheets (WO 3 NS)/g-C 3 N 4 Nanosheets’ (g-C 3 N 4 NS) nanocomposite photocatalyst was fabricated through a simple calcination process. WO 3 NS was first prepared with the aid of P123 lamellar micelles and g-C 3 N 4 NS was synthesized by two-step calcination process. The nanocomposite photocatalyst was characterized by X-ray powder diffraction, scanning electron microscopy, Fourier transform infrared spectrometry, UV–Vis diffuse reflection spectroscopy, X-ray photoelectron spectroscopy, and photoluminescence. The novel nanocomposite photocatalyst demonstrated higher photocatalytic activity for rhodamine B degradation than corresponding g-C 3 N 4 NS. 20 wt% WO 3 NS/g-C 3 N 4 NS showed the highest photocatalytic performance, which was 4.70 times higher than that of pure g-C 3 N 4 NS. The results confirmed that the incorporation of WO 3 NS could definitely accelerate the transfer of photogenerated electrons and effectively promote the separation of electrons and holes, thereby improving the photocatalytic efficiency. The trapping experiments proved that the mechanism of photocatalytic degradation may be rooted in the formation of Z-scheme system.
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
CERAMICS INTERNATIONAL
·
2020
·Vol. 47
·期 5
·5918-5928
·
IF 3.83
Yu Zhao,Tianqi Zhang,Liaoyuan Chen,Tianbiao Yu,Jiayu Sun,Chuang Guan
In situ Ti(C, N), ring phase, and multi-phase enhanced Ni204-based alloy coating were prepared by adding various Ti/C/TiN ratios particles. The effects of the reinforcement phase on the microstructure, microhardness , tribological property, and microstructure characteristics at the interface between the coating and substrate were investigated. The results show that the coatings with a 5:1 mass fraction ratio of TiN/C exhibits the highest microhardness , which is 3.78 times higher than that of the original Ni204 coating. While, the coating with 21:7:2 mass fraction ratio of TiN/Ti/C exhibits the lowest friction coefficient , which is 4.44 times smaller than that of the original Ni204 coating. The addition of Ti and C particles promotes the precipitation of ring phase and carbides , reduces ceramic agglomeration, alleviates the floating of ceramic particles, and improves the bonding strength of reinforcement phases. Owing to the good mutual solubility among Fe, Ni, and, Cr elements, the diffusion happened at the interface between the coating and substrate.
研究领域:
材料科学
·
表面工程
·
金属学与金属工艺
·
机械工程
·
复合材料
✓ 已验证
DOI
高影响因子
Results in Physics
·
2022
·
IF 4.565
Yige Du,Qilong Gao,Andrea Sanson,Hengli Xie,Yangming Hu,Gaojie Zeng,Juan Guo,Xiao Ren,Erjun Liang
Negative thermal expansion (NTE) is an intriguing physical phenomenon, which is of great significance for the high precision application. In this work, we have realized to broaden the NTE temperature zone in Mg 2 P 2 O 7 -based bulk material by doping Cu atom on the Mg site. A joint study of Raman scattering and X-ray diffraction (XRD) indicates that there are double phases in the NTE temperature zone, and the NTE of Mg 1.9 Cu 0.1 P 2 O 7 bulk material comes from the phase transition of α - and β -phase. The present work provides a way to optimize negative thermal expansion property in phase transition typed materials.
研究领域:
材料科学
·
凝聚态物理
·
无机化学
·
功能材料
·
热学性能
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shufang Chang,Yiwen Hu,Jun Qian,Yinlin Shao,Shuang Ni,Lulu Kong,Wenyan Dan,Chun Luo,Shu Jin,Xiaoxiang Xu
Nitrogen doped Mg 2 TiO 4 spinel, i.e. Mg 2 TiO 4−x N y , has been synthesized and investigated as a photocatalyst for antibacterial activity. Mg 2 TiO 4−x N y demonstrates superior photocatalytic activity for E. coli disinfection under visible light illumination (λ ≥ 400 nm). Complete disinfection of E. coli at a bacterial cell density of 1.0 × 10 7 CFU mL −1 can be achieved within merely 60 min. Mg 2 TiO 4−x N y is capable of generating superoxide radicals ( O 2 − ) under visible light illumination which are the reactive oxygen species (ROSs) for bacteria disinfection. DFT calculations have verified the importance of nitrogen dopants in improving the visible light sensitivity of Mg 2 TiO 4−x N y . The facile synthesis, low cost, good biocompatibility and high disinfection activity of Mg 2 TiO 4−x N y warrant promising applications in the field of water purification and antibacterial products.
研究领域:
材料科学
·
环境科学
·
微生物学
·
光催化
·
纳米医学
·
生物材料
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Yuandong Wu,Yanlong Sun,Chengzhi Zhou,Junfeng Niu
A regeneration method for porous electrospun membranes embedding alumina nanoparticles saturated with minocycline was investigated by UV-LED system. The percentage of adsorption capacities before and after regeneration were used to evaluate regeneration efficiency. The PVDF and PVDF-Al 2 O 3 fiber mats were prepared by electrospinning technique. Scanning electron microscope (SEM), transmission electron microscope (TEM), energy-dispersive X-ray spectroscopy (EDS) analyses directly confirmed that Al 2 O 3 nanoparticles were generally exposed to the surface of PVDF-Al 2 O 3 fiber mats. Among them, PVDF-Al 2 O 3 10% fiber mats can effectively adsorb minocycline (remove efficiency >97% in 18 h) with first-order rate constant k = 2.253 ± 0.331 h −1 . The sorption capacity can still keep 81% after five sorption/UV-regeneration circulations. Two successional stages may exist during regeneration: (i) transfer of minocycline from the surface of PVDF-Al 2 O 3 fibers to the DI water , followed by the (ii) decomposition of this compound in aqueous solution by direct and indirect photolysis to yield the intermediate species. The desorption capacity and desorption percentage were 4.39 mg g −1 and 23.30% respectively. The regeneration yields were further enhanced to 94.20% by UV radiation. Minocycline was effectively degraded to intermediate products by direct and indirect photolysis, further degraded into CO 2 , H 2 O, and NO x by UV-generated ozone during regeneration. The results indicated that UV radiation was an effective method of regenerating PVDF-Al 2 O 3 fiber mats with low energy requirements. The photochemical byproducts and the reaction sites during regeneration were also determined and recognized.
研究领域:
环境科学
·
纳米材料
·
药物污染治理
·
光催化降解
·
水处理技术
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 40
·5214-5221
·
IF 2.378
Mingyu Tang,Xiaodong Liu,Nannan Zhang,Jingyu Pang,Yu Zou,Fang Chai,Hongbo Wu,Lihua Chen
Herein, nitrogen and sulfur codoped carbon dots (N&S CDs) were prepared by a facile hydrothermal process and they could be introduced as a fluorescent probe for the determination of cadmium ions (Cd2+), yielding high sensitivity and excellent selectivity. The obtained N&S CDs exhibited bright blue fluorescence with a quantum yield of 40% and exhibited a fast responsive fluorescence quenching signal within 2 min toward Cd2+ in both ultrapure water and real water samples. The CDs responded to Cd2+, which acted as a quencher of blue fluorescence at 459 nm with the limit of detection of 0.018 μM in the range of 0.02–1 μM. The quenching fluorescence behavior was found to obey the static quenching effect (SQE). The low toxicity and good cell permeability of CDs were verified by cell experiments.
研究领域:
分析化学
·
环境科学
·
纳米材料
·
生物传感
·
环境污染监测
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）