ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2019
·Vol. 26
·期 22
·22351-22361
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IF 2.914
Wei Jiaqi,Gu Junjie,Guo Junheng,Li Wei,Wang Chenglong,Zhang Jinli
A new method was developed for denitrification and desulfurization using hydrogen peroxide with the aid of an ultrasonic nebulizer to obtain high removal efficiency of NOx and SO 2 . Comparing with the atomizing nozzles having the aperture size of 0.01~0.02 mm, the droplets generated using the ultrasonic nebulizer show the smallest d 50 value of 7.2 μm, with 72% possessing the size less than 10 μm. Based on the numerical simulation of the vaporization rate of droplets, it is indicated that the droplets with the size of 7.2 μm can be vaporized totally at very short residence time (0.11 s) under 130 °C. Effects of influence factors including the reaction temperature, the initial H 2 O 2 concentration, pH value, and the flue gas flow rate were studied on the removal efficiencies of NO and SO 2 . Using the in-series double-oxidation subsystems with H 2 O 2 concentration of 6 wt%, pH 5.0, and the reaction temperature of 130 °C, the removal efficiencies of SO 2 and NO are respectively 100% and 89.3% at the short residence time of 1.8 s, and the removal efficiency of NO can be increased to 100% as the residence time is longer than 3.7 s. It is confirmed that the ultrasonically atomized H 2 O 2 can indeed enhance the removal efficiencies of NO and SO 2 at the optimal temperature, owing to the fast vaporization rate of fine droplets as well as the formation of more active radicals to be captured by NO and SO 2 simultaneously. The results here provide a promising route to remove effectively the emissions of NO and SO 2 simultaneously.
Graphical abstract
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CULTURAL HERITAGE
·
2024
·
IF 3.5
Bei He,He Zhao,Weiying Li,Ling Meng,Chuanfu Liu,Huiming Fan,Junli Ren,Huiping Xing,Pujun Jin
Deacidification is a necessary and urgent means of protecting acidified paper documents. However, the contradiction between deacidification efficiency and uniformity in existing aqueous or organic phase deacidification methods has not been resolved yet, which is mainly attributed to the differences in capillary action of paper on solvents with different polarities. In this work, a strategy of two-phase deacidification was proposed to achieve efficient and uniform deacidification and long-lasting aging resistance. Impregnation of nano magnesium oxide organic dispersion of deacidified paper achieved efficient batch deacidification and sufficient alkali reserve. Using ultrasonic atomization of saturated calcium hydroxide aqueous solution, the penetration of alkaline substances into paper promoted uniform deacidification based on strong capillary action. Meanwhile, microstructural reinforcement of paper fibers was achieved based on the multiple interactions. This method can endow the treated paper with better thermal stability and long-lasting aging resistance. After artificial accelerated aging for 30 d, the treated paper samples still maintained the highest tensile index (18.46 Nm/g), folding endurance (8.5 times), tear index (3.95 mN·m 2 /g) and displayed negligible chromatic aberration (∆ E = 2.46 ± 0.21). This method greatly extends the lifespan of acidified paper, which has significant value for the protection of paper documents.
研究领域:
文物保护
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Haoran Xia,Zhu Ma,Zheng Xiao,Weiya Zhou,Hua Zhang,Caichen Du,Jia Zhuang,Xiaowei Cheng,Xingchong Liu,Yuelong Huang
Tin dioxide (SnO 2 ) is a promising electron transport material to replace traditional titanium dioxide (TiO 2 ) for fabricating efficient planar perovskite solar cells (PSCs). However, in order to realize process compatibility and larger scale device, low temperature solution processed SnO 2 is normally used, which generates numerous trap states in ETL layer and directly affects the device performance. Here, an interfacial modification strategy proposed, depositing an ultrasonic atomized ultrathin graphene quantum dots (GQDs) layer between tin dioxide (SnO 2 ) and perovskite layer. Ultrasonic atomized deposition can effectively prevent the damage of the surface chemical properties of SnO 2 by aqueous solution. Additionally, we demonstrate that the GQDs change the surface property of SnO 2 film, and optimized the charge transport capability in SnO 2 and perovskite interface. Correspondingly, we obtained a significant power conversion efficiency (PCE) improvement for CH 3 NH 3 PbI 3 -based PSCs from 13.61% to 16.54% and reached a highest steady-state PCE over 16%. We believe that the interfacial modification engineering by means of ultrasonic atomizing process is a promising tactic to obtain efficient perovskite solar cells.
研究领域:
材料科学
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能源技术
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纳米科技
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 133
·期 17
·
IF 1.866
Ruiqing Hu,Yuping Pi,Na Wang,Qian Zhang,Jinqi Feng,Weilin Xu,Xia Dong,Dujin Wang,Hongjun Yang
Biodegradable polymers have received increased attention due to their potential application in the medicine and food industries; in particular, poly(lactic acid) (PLA) is a primary biopolymer because of its excellent biocompatibility and absorbability features. In this study, a porous PLA membrane was fabricated by phase separation using water microdroplets produced by an ultrasonic atomizer as a coagulation bath. The formation of S-type clusters was attributed to the slow exchange rate between solvent and coagulant, which provided time for the movement of polymer molecules. The effect of preparation conditions on the structure of S-type clusters, including polymer concentration in solution and ambient temperature was investigated. The PLA porous membrane prepared from water micro-droplets with different morphology compared with the sample fabricated from distilled water has potential application in fields of tissue engineering and artificial organ generation. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43355.
研究领域:
生物材料学
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高分子科学
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组织工程
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再生医学
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纳米结构制备
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相变动力学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Jian Wang,Fang Feng,Chang Wang,Wei-Cheng Yan,Weidong Shi
Ultrasonic atomization pyrolysis (UAP) is an effective method for the mass production of micro-/nano-photocatalysts; however, studies on particle-flow behaviors and the collection efficiency were seldom reported, which are very important for its scale-up and industrialization. In this study, a computational fluid dynamics model was developed to simulate the UAP process. Experiments were carried out via a self-designed UAP setup to validate the developed model. A two-way coupling discrete phase model considering particle collision and breakage was employed to investigate the influence of operating conditions (for example, carrying gas flow rate, precursor concentration, ultrasonic frequency, particle injection rate, and temperature) on the collection efficiency and particle-flow behaviors. Effects of particle polydispersity were also studied based on the developed model. Finally, three types of UAP reactors were designed based on the developed model, and the results suggested that a T-shape reactor possessed higher particle collection efficiency. This study could help to understand the particle-flow behaviors inside the reactor, and the developed model could serve as a tool to optimize the design and operation of the UAP reactor toward large-scale production of photocatalysts.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Peng Li,Muan Yu,Kang Gao,Kuo Chen,Xiujie Yang,Haixiang Sun,Yingfei Hou,Q. Jason Niu
Layer-by-layer (LBL) self-assembled films of polyethyleneimine (PEI)/graphene oxide (GO) based on non-covalent force exhibit superior hydrogen barrier properties. Nevertheless, immersing the film in the self-assembly solution brings the problem of cross-contamination during the experiment. The deionized water rinsing step not only consumes time, but also increases the tediousness of membrane production and generates plenty of waste liquid. Herein, a PEI/GO hydrogen barrier film was prepared by ultrasonic atomization-assisted technology. Relying on stable and continuous spraying process and tiny droplets to achieve a unified and ordered surface of the film. The spray time, the dispersion concentration of GO, the pH of PEI solution, and the number of assembled layers were investigated in depth. The study shows that the hydrogen barrier film with excellent performance can be prepared by the atomization-assisted method. When the concentration of GO was 0.9 mg ml −1 , the spray time of PEI and GO were 8 s and 20 s, the pH of PEI and GO were 10 and 4, respectively, the hydrogen transmission rate of 25-layer PEI/GO composite films was 21.343 cm 3 m −2 ·day −1 ·0.1 MPa −1 , which was 92.38% lower than that of polyethylene terephthalate (PET) substrates film. Furthermore, this method has high raw material utilization and is easy to scale.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2024
·
IF 2.6
Yaling Yuan,Yue Zhong,Yanbin Yang,Ke Li
Myoglobin (Myo), creatine kinase-MB (CKMB), and cardiac troponin I (cTnI) are crucial biomarkers for diagnosing acute myocardial infarction (AMI) The accurate and rapid detection of these three targets can greatly improve the prognosis of AMI patients. Herein, this study developed a microfluidic immunofluorescence method that can detect all three targets in 10–15 min. Ultrasonic atomization and spray technology are used to modify the surface of the injection-molded microfluidic chip (MFC), which effectively solves the problem of biological cross-linking and antibody immobilization on the MFC surface. In addition, it improves the hydrophilicity of the chip surface, thus enhancing fluid self-driving effect. The linear response towards Myo, CKMB and cTnI range from 5 ng/mL to 500 ng/mL, 1 ng/mL to 70 ng/mL, and 0.05 ng/mL to 30 ng/mL, respectively. The intra-batch precision is ≤ 10%, and the inter-batch precision is ≤ 15%. Furthermore, this method shows good consistency compared with the BECKMAN ACCESS2 chemiluminescent immunoanalyzer. The present work provides an AMI diagnostic method with high sensitivity, good repeatability, high accuracy and simple operation, which can satisfy the needs of clinical diagnosis, and shows promising application prospects.
研究领域:
生物医学工程
·
心脏病学
·
诊断方法
·
微流控技术
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）