Catalysts
·
2024
·Vol. 14
·期 9
·579
·
IF 3.8
Qingbao Gan,Jianwei Zhang,Jinglin Wang,Yuntian Wei,Shikun Chen,Shuguang Cai,Xueqing Xiao,Chan Zheng
The excessive discharge of antibiotics into aquatic systems is a major issue in many countries worldwide and poses a threat to human health and the sustainable development of society. Hence, developing efficient treatment methods and purification technologies to degrade antibiotics is essential. Herein, we present the synthesis of low-cost, self-propelled tubular Fe3+-incorporated graphitic carbon nitride (g-C3N4-Fe@KF) micromotors using kapok fibers (KFs) as templates and their application as photo-catalysts for the photo-Fenton degradation of tetracycline (TC) under visible-light irradiation. The g-C3N4-Fe@KF micromotors moved rapidly when being propelled by oxygen bubbles generated in a hydrogen peroxide (H2O2) solution as a result of a photo-assisted Fenton reaction. The motion behavior of the g-C3N4-Fe@KF micromotors was dependent on the concentration of H2O2and the length of the micromotors. The propulsion mechanism was discussed in detail. The micromotors efficiently degraded antibiotics via the photo-Fenton process. Photo-Fenton degradation efficiency was attributed to the synergistic effects of the doped Fe3+and g-C3N4under visible-light irradiation and self-propulsion of the micromotors. In addition, the micromotors possessed good reusability, thereby efficiently realizing multiple cycles of degradation. The current work offers an avenue for the design of micromotors, using inexpensive approaches, for various potential environmental applications.
研究领域:
环境科学
·
材料科学
·
催化化学
·
纳米技术
·
水污染治理
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2015
·
IF 1.955
Xiulan Hu,Yanqiu Xu,Haikui Zhu,Fengnan Hua,Shoufeng Zhu
Square-like bismuth oxychloride (BiOCl) nanoplates with high exposed {001} facets were successfully synthesized through a facile hydrothermal process in the presence of sodium citrate . Citric anions reduce BiOCl nanoplate size and lead to high intensity ratio of (001)–(102) by selectively absorbing on the {001} facets of BiOCl nanoparticles or nanoplates. Size of BiOCl nanoplates decrease to about 200 nm when 1.5 mmol sodium citrate was added. Thickness of BiOCl nanoplates also decreases from 100 nm to about 45 nm with increasing sodium citrate amounts. Diffraction peak intensity ratio of (001)–(102) of BiOCl nanopaltes is up to 0.93 with the adding of 1.5 mmol sodium citrate. As-obtained BiOCl nanoplates show a higher photocatalytic activity for degrading methyl orange (MO) than that prepared without sodium citrate under simulated sunlight irradiation.
研究领域:
材料化学
·
纳米科学
·
光催化
·
无机合成
·
环境功能材料
✓ 已验证
DOI
高影响因子
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
·
2021
·Vol. 66
·期 13
·1986-1994
·
IF 1.312
Dongmei He,Du Liyong,Wang Keyan,Ding Yuqiang
As a cost-effective material, CuO has been widely used in many emerging fields. The synthesis method plays a key role in the performance of the material. Atomic layer deposition (ALD) has been developed as a precise technique to deposit materials with great control at atomic scale. Herein, an efficient process of ALD CuO is reported by using [Cu( s Bu-amd)] 2 and O 3 as precursors. CuO films can be deposited on SiO 2 substrates with typical self-limiting growth behaviors at 120–220°C. Notably, the growth rate of the CuO films is reach up to 2.5 Å/cycle, which is 6~12 times more than the available value. This remarkably high efficiency is the critical factor to promote the large-scale applications of ALD CuO materials. Furthermore, CuO is deposited on TiO 2 nano-particles (forming CuO/TiO 2 composite) using this ALD process to evaluate its performance for H 2 evolution. The 0.37 wt % CuO/TiO 2 composite (120 cycles CuO/TiO 2 ) can achieve a H 2 evolution rate of 3995 μmol g –1 h –1 , which is nearly 200 times larger than pure TiO 2 .
研究领域:
材料科学
·
纳米科技
·
催化化学
·
能源材料
·
半导体薄膜
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 32
·10620-10629
·
IF 4.029
Songsong Li,Dongsheng Dai,Lei Ge,Yangqin Gao,Changcun Han,Nan Xiao
Novel layer-like Ni(OH)2 co-catalyst-decorated ZnIn2S4 microsphere photocatalysts were synthesized for the first time via a facile in situ deposition method to boost the photocatalytic H2-production performance. The physical and optical properties of the as-prepared Ni(OH)2–ZnIn2S4 composite samples were characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis diffusion reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and surface photovoltage spectroscopy (SPV). The results indicate that the photocatalytic H2 evolution activity of the ZnIn2S4 microspheres under visible light irradiation significantly enhances by introducing inexpensive Ni(OH)2 as a co-catalyst. The 5 mol% Ni(OH)2–ZnIn2S4 sample shows the highest H2-production rate of 8.35 mmol g−1 h−1, which is 18 times higher than that of pure ZnIn2S4. Moreover, photocatalytic activity of the Ni(OH)2–ZnIn2S4 sample remains stable even after 4 cycling photocatalytic experiments. In addition, a possible mechanism on the enhanced photocatalytic activity was proposed and verified by surface photovoltage spectroscopy.
研究领域:
材料科学
·
光催化
·
能源化学
·
纳米材料
·
半导体催化
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2017
·Vol. 75
·期 12
·2935-2951
·
IF 1.197
Peng Mingguo,Li Huajie,Kang Xu,Du Erdeng,Li Dongdong
The removal of ibuprofen (IBP) in aqueous solution using UV/H 2 O 2 process was evaluated. The response surface methodology (RSM) and Box–Behnken design were employed to investigate the effects of process parameters on IBP removal, including the initial IBP concentration, H 2 O 2 dosage, UV light intensity, and initial pH value of solution. The RSM model developed herein fits well with the experiments, and provides a good insight into the OH radical irritated degradation mechanisms and kinetics. High resolution accurate mass spectrometry coupled with liquid chromatography was used to identify the degradation intermediates. A total of 23 degradation products were identified, including mono-hydroxylated products and dihydroxylated products. A series of OH radical-initiated reactions, including hydroxylation, dihydroxylation, decarboxylation, demethylation, ring break, lead to the final mineralization of IBP to CO 2 and H 2 O. UV/H 2 O 2 technology could be a promising technology for IBP removal in aqueous solution.
研究领域:
环境化学
·
水处理技术
·
药物降解
·
环境污染物治理
·
高级氧化技术
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2014
·Vol. 70
·期 12
·1913-1918
·
IF 1.212
Meng Lifen,Ning Jinyan,Yang Yaling
A sensitive and simple method for flame atomic absorption spectrometry determination of traces of cadmium and chromium(III) species in water samples after preconcentration by cloud point extraction has been developed. A novel complex agent of alizarin complexone with cadmium (Cd) and chromium (Cr(III)) was quantitatively extracted in surface primary alcohol ethoxylate-rich phase at 33 °C. The effects of experimental conditions including pH of sample solution, concentration of chelating agent and salt, equilibration temperature and time, and foreign ions were evaluated in order to enhance sensitivity of the method. Under optimal conditions, the low limit detections were 6.7 and 3.2 μg/L, and the enrichment factors were 24 and 20 for Cd and Cr(III), respectively. The relative standard deviations were 3.8 and 2.5% for Cd and Cr(II), respectively ( n = 11). The high recoveries of the spiked Cd and Cr(III) ions were obtained in the range of 90–116%. The proposed method has been successfully applied for the determination of Cd and Cr(III) in water samples.
研究领域:
分析化学
·
环境监测
·
重金属检测
·
水环境科学
·
痕量元素分析
✓ 已验证
DOI
高影响因子
Soft Matter
·
2017
·Vol. 13
·期 19
·3514-3520
·
IF 3.889
Huifang Xu,Na Du,Yawen Song,Shue Song,Wanguo Hou
In the current work, the microviscosity, encapsulation, and permeability of 2-ketooctanoic acid (KOCOOH) vesicle membranes were investigated by steady-state and time-resolved fluorescence techniques, using 1,6-diphenyl-1,3,5-hexatriene (DPH), riboflavin, and calcein as fluorescence probes. Our results show that the microviscosity of KOCOOH membranes is similar to that of common bilayer aggregates, the KOCOOH vesicles have the ability to encapsulate hydrophilic guests, and the KOCOOH membranes are permeable to ions. The permeation of OH− across KOCOOH membranes can be well described using a first-order kinetic model. The KOCOOH vesicles may be a good alternative protocell model that possesses some functional properties necessary for early cell membranes. To the best of our knowledge, this is the first report on the characteristics of vesicle membranes of single-tailed keto-acid amphiphiles.
研究领域:
生物物理化学
·
膜生物学
·
化学生物学
·
原始细胞研究
·
分子自组装
·
前生命化学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Zehan Liu,Pengpeng Cheng,Yongfei Li,Ruyan Kang,Jian Zhou,Jia Zhao,Zhiyuan Zuo
With the aim of addressing the growing challenge of approaching the end of Moore's law and von Neumann bottleneck, the evolution of neuromorphic computing based on memristors that emulate the behaviors of the brain has attracted great attention. Organic-inorganic hybrid lead halide perovskites with inherent hybrid ionic-electronic conduction ability have been proposed as promising candidates for memristors to replace traditional charge-based memory. Here we propose MA 0.85 Cs 0.15 PbI 3 memristors with high surface crystallinity and stable operation in the atmospheric environment by mixing inorganic cation Cs + and organic cation MA + . The prepared memristors present excellent resistive switching performances including low operation voltage, high ON/OFF ratio, stable endurance, long retention, and robustness under ambient condition. Besides that, four distinct resistance states have been obtained in the above devices by modifying the operation voltages. Moreover, the resistance switching processes can be controlled both by electrical field and light illumination. Finally, this research provides utilization potentiality in the optical and electrical two-dimension controlled multilevel information devices with a total of five stable resistance states. The present work would offer an effective way to develop multifunctional high-density data-storage applications by storing multiple resistance states in a single unit cell.
研究领域:
材料科学
·
纳米电子学
·
凝聚态物理
·
信息存储技术
·
类脑计算
✓ 已验证
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 13
·8145-8153
·
IF 4.036
Yulei Gao,Xiang Di,Fenfen Wang,Pingchuan Sun
Amorphous polymer-based room temperature phosphorescence (RTP) materials exhibiting tunable emission colors have received tremendous attention and are extremely challenging to prepare. Herein, polyacrylamide-based RTP materials with tunable multicolor emission were prepared via copolymerizing phosphor with concentration dependent luminescence colors and acrylamide with different molar ratios. The hydrogen bonding interactions and chemically crosslinked structures in these polymers effectively restrict the mobility of phosphors and activate efficient RTP emission. The molar ratio of phosphor and acrylamide has a significant influence on the photophysical properties of these polymers, which can be used to fabricate multicolor materials. In addition, the RTP intensity decreases with increasing humidity due to the disassociation of hydrogen bonding by adsorption of water, manifesting as a humidity sensor. Benefiting from the distinguishable RTP lifetimes and the responsiveness to humidity, triple encoding for information encryption is successfully realized.
研究领域:
高分子化学
·
分析化学
·
材料科学
·
传感器技术
·
信息安全
✓ 已验证
DOI
高影响因子
CURRENT APPLIED PHYSICS
·
2023
·
IF 2.4
WenXin Zhang,Hao Li,Haofei Cong,Ruifu Zhou,Yuanbin Qin,Peilong Xu,Xuhai Liu,Fengyun Wang
One-dimensional wide band-gap metal oxide semiconductors demonstrate enormous potential in high-performance ultraviolet photodetectors. Here, via tuned zinc oxide (ZnO) concentration ratio and heterojunction structure as well as decent V TH value, we electrospun tin zinc oxide (SnZnO X ) nanowires for photoelectronic conversion function. The constructed optimized photodetectors based on Sn 8 Zn 2 O X nanowires can exhibit a remarkable detectivity of 1.77 × 10 16 Jones, excellent responsivity of 2.23 × 10 3 A/W and relative high sensitivity over 10 4 . In addition to the excellent photodetection performance, Sn 8 Zn 2 O X nanowire devices exhibit nonvolatile memory effect , which can maintain the light-induced low resistance state at 5 V without light. Moreover, a voltage of 30 V was applied to Sn 8 Zn 2 O X nanowires devices to realize light-writing state switching to bias-erasing state, and the device could come back to their initial high resistance state. These results indicate SnZnO X nanowires devices possess a tremendous potential in the circuit design of the artificial visual system.
研究领域:
材料科学
·
纳米电子学
·
光电子学
·
半导体器件
·
人工视觉系统
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2013
·
IF 5.437
Yaqi Hu,Zhonghua Xue,Hongxia He,Ruixia Ai,Xiuhui Liu,Xiaoquan Lu
A novel light “on–off” photoelectrochemical sensing for the sensitive determination of hydroquinone was developed based on the porphyrin-functionalized Au nanoparticles on graphene (porphyrin/AuNPs/graphene). Gold nanoparticles (AuNPs) were firstly modified onto graphene sheets using NaBH 4 as reductant and the porphyrin/AuNPs/graphene nanocomposites were then synthesized by self-assembly decoration of sulfhydryl porphyrin on AuNPs modified graphene sheets by S–Au bond. The porphyrin/AuNPs/graphene nanocomposites were characterized by transmission electron microscopy , X-ray photoelectron , and ultraviolet–visible absorption spectroscopies . The nanocomposites showed good dispersion in water and on indium tin oxide (ITO) surface. The resulting porphyrin/AuNPs/graphene modified ITO electrode showed good photoelectrochemical behavior toward the oxidation of hydroquinone (HQ) at 0 V under white light illumination. The proposed photoelectrochemical method could detect hydroquinone with a wide linear response ranging from 20 to 240 nM ( R =0.9914). The detection limit was 4.6 nM for HQ ( S / N =3). Thus, the nanocomposites would be expected to be a novel photoactive material for photoelectrochemical biosensing.
研究领域:
分析化学
·
纳米生物技术
·
环境监测
·
电化学
·
生物传感器
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 50
·期 14
·25541-25547
·
IF 5.1
Hang Zhang,Ahsan Nawaz,Feiyu Huang,Zhiping Zhang,Hongfei Liu
Orthorhombic In 0.5 Sc 1.5 Mo 3 O 12 thin films have been synthesized using the sol-gel spin coating . Influences of post-annealing temperatures on crystal structure, morphology, negative thermal expansion (NTE) and optical performances of the thin films were studied using XRD , SEM, XPS, high-temperature XRD and UV–Vis–NIR spectrophotometer. XRD and SEM results show that as-prepared thin film is in an amorphous state with a smooth and dense surface. Orthorhombic In 0.5 Sc 1.5 Mo 3 O 12 thin films were obtained after post-annealing in 550–750 °C. The higher the annealing temperature in 550–750 °C, the better the crystallinity of orthorhombic In 0.5 Sc 1.5 Mo 3 O 12 thin films . In addition, the grain size of the In 0.5 Sc 1.5 Mo 3 O 12 thin film also grows as the annealing temperature increases. The resulting orthorhombic In 0.5 Sc 1.5 Mo 3 O 12 thin films exhibit anisotropic NTE. Its volumetric coefficient of thermal expansion (CTE) is −3.44 × 10 −6 °C −1 , while the CTEs in a -, b - and c -axis directions are −4.70 × 10 −6 °C −1 , 5.37 × 10 −6 °C −1 , and -4.10 × 10 −6 °C −1 in 25–700 °C, respectively. In addition, the transmittance of orthorhombic In 0.5 Sc 1.5 Mo 3 O 12 thin films post-annealed at 750 °C is around 87.75 %–95.03 %.
研究领域:
材料科学
·
无机非金属材料
·
功能薄膜
·
热膨胀调控
·
光学材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）