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学者姓名:敬登伟

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Effects of the surface wettability of nanoparticles on the impact dynamics of droplets EI SCIE
期刊论文 | 2021 , 246 | CHEMICAL ENGINEERING SCIENCE
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Abstract :

Herein, we report an experimental investigation on droplet impact dynamics with a particular interest in the effects of hydrophilicity and hydrophobicity of particles on the impact dynamics. Remarkable contact line pinning and receding breakup were observed when hydrophobic particles were present in the dro-plets, while hydrophilic particles showed little effect on the dynamics. Furthermore, the maximum retraction height and vertical oscillatory relaxation time for the droplet were restrained by hydrophobic particles. Scanning electron microscopy and rheological analyses revealed that these phenomena may be related to the adsorption and deposition of hydrophobic particles near the three-phase contact line, which leads to an increase in local viscosity and friction near the edge of the drop. In addition, the contact line pinning is positively associated with the Weber number and particle concentration. Our work pro -vides a novel approach for droplet impact dynamics control, particularly for suppressing the oscillation and contraction of droplets. (c) 2021 Elsevier Ltd. All rights reserved.

Keyword :

Hydrophobic nanoparticles Pinning effect Receding breakup Hydrophilic nanoparticles

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GB/T 7714 Hu, Meibing , Zhou, Jiandong , Li, Yang et al. Effects of the surface wettability of nanoparticles on the impact dynamics of droplets [J]. | CHEMICAL ENGINEERING SCIENCE , 2021 , 246 .
MLA Hu, Meibing et al. "Effects of the surface wettability of nanoparticles on the impact dynamics of droplets" . | CHEMICAL ENGINEERING SCIENCE 246 (2021) .
APA Hu, Meibing , Zhou, Jiandong , Li, Yang , Zhuo, Xin , Jing, Dengwei . Effects of the surface wettability of nanoparticles on the impact dynamics of droplets . | CHEMICAL ENGINEERING SCIENCE , 2021 , 246 .
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Recent progress of energy harvesting and conversion coupled with atmospheric water gathering EI SCIE
期刊论文 | 2021 , 246 | ENERGY CONVERSION AND MANAGEMENT
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With the advantages of environmental protection, energy saving and sustainability, the technology of energy harvesting and conversion coupled with atmospheric water gathering has gradually attracted the attention of researchers under the threat of global water and energy issues. This review paper briefly described the basic working principles of energy harvesting and conversion coupled with atmospheric water gathering technology at first and then comprehensively summarized the representative materials and corresponding devices recently developed for the generation of different kinds of energies (such as electricity and chemical energy, especially hydrogen energy) by energy harvesting and conversion coupled with atmospheric water gathering technology. Electricial energy was generated based on four effects (thermoelectric, electrokinetic, triboelectric and hydrovoltaic effects) and two processes (electrochemical and photoelectric chemical processes), while hydrogen was produced based on photoelectrochemistry, photocatalysis and photovoltaic electrolysis. Based on the above analysis, it was found that the great progress, including new mechanisms and new technical paths, has been achieved on energy harvesting and conversion coupled with atmospheric water gathering technology in the last few years, but there are still many challenges to overcome and directions to explore for further development. At last, this review paper discussed some potential strategies for promoting the output efficiency and performance of energy harvesting and conversion devices. Optimizing the materials and components used in energy harvesting and conversion devices and adding energy storage modules to achieve all-weather energy supply will push this technology into a wider range of applications and better solve the global water and energy crises.

Keyword :

Hydrogen Atmosphere water gathering Electricity Energy harvesting Energy conversion

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GB/T 7714 Chen, Zhihui , Shi, Jinwen , Li, Yueqi et al. Recent progress of energy harvesting and conversion coupled with atmospheric water gathering [J]. | ENERGY CONVERSION AND MANAGEMENT , 2021 , 246 .
MLA Chen, Zhihui et al. "Recent progress of energy harvesting and conversion coupled with atmospheric water gathering" . | ENERGY CONVERSION AND MANAGEMENT 246 (2021) .
APA Chen, Zhihui , Shi, Jinwen , Li, Yueqi , Ma, Benchi , Yan, Xueli , Liu, Maochang et al. Recent progress of energy harvesting and conversion coupled with atmospheric water gathering . | ENERGY CONVERSION AND MANAGEMENT , 2021 , 246 .
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Recent progress on sorption/desorption-based atmospheric water harvesting powered by solar energy EI SCIE
期刊论文 | 2021 , 230 | SOLAR ENERGY MATERIALS AND SOLAR CELLS
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With the advantages of high efficiency, clean and renewable energy, the technology of sorption/desorption-based atmospheric water harvesting powered by solar energy has gradually attracted the increasing attention of researchers. In this review paper, through analyzing and summarizing the principles, the performance indexes, the measurements of parameters, the material types, the morphology modification, and the system design and devices of this technology, it was found that the existing research mainly focused on adsorbents, while there are still some imperfections, such as limited application circumstances, instability, discontinuous working and long cycle. Accordingly, the direction of future research is expected to redesign adsorbent materials for higher adsorptiondesorption rate and wider range of applications, add heat accumulator and air-driving equipment to make system controllable and flexible, miniaturize devices for convenient utilization, and optimize systems to shorten the water collection cycle and to achieve rapid and continuous working. To follow the direction above, there are also some suggestions for adsorbents and system design.

Keyword :

Atmospheric water generator Solar energy Sorbent Heat accumulator Water harvesting device

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GB/T 7714 Chen, Zhihui , Song, Shiyu , Ma, Benchi et al. Recent progress on sorption/desorption-based atmospheric water harvesting powered by solar energy [J]. | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2021 , 230 .
MLA Chen, Zhihui et al. "Recent progress on sorption/desorption-based atmospheric water harvesting powered by solar energy" . | SOLAR ENERGY MATERIALS AND SOLAR CELLS 230 (2021) .
APA Chen, Zhihui , Song, Shiyu , Ma, Benchi , Li, Yueqi , Shao, Yu , Shi, Jinwen et al. Recent progress on sorption/desorption-based atmospheric water harvesting powered by solar energy . | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2021 , 230 .
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A study of a computational BVP for heat transfer and friction drag in magnetohydrodynamics viscous flow of a nanofluid subject to the curved surface SCIE
期刊论文 | 2021 | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
WoS CC Cited Count: 1
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Abstract :

The ongoing work investigates the features of Joule heating and convective condition over a magnetohydrodynamic stagnation point flow of Fe3O4 - water nanofluid moving across a curved surface. Moreover, mass suction is supposed through the stretching/shrinking surface. The initially developed model of partial differential equations is transformed into the ordinary ones assisted by suitable similarity variables. Subsequently, the ultimate nonlinear model of ordinary differential equations is solved with the help of a built-in function bvp4c package in MATLAB. Several graphical results are plotted to see the influence of various dimensionless parameters over the velocity, temperature, heat transfer, and friction drag. We found that there exists an escalation in temperature with increasing values of curvature, Eckert number, Hartmann number, and Biot number; however, the velocity profile declines with large curvature, ratio parameter, and high concentration of nanoparticles. It is also important to note that the friction drag rises with the mass suction, and reduces with vast curvature, whereas the rate of heat transfer improves with suction and Biot number but lowers with Eckert number and Hartmann number.

Keyword :

suction curved surface Nanofluid stretching/shrinking magnetohydrodynamics convective condition

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GB/T 7714 Khan, M. Riaz , Saleel, C. Ahamed , Saeed, Tareq et al. A study of a computational BVP for heat transfer and friction drag in magnetohydrodynamics viscous flow of a nanofluid subject to the curved surface [J]. | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING , 2021 .
MLA Khan, M. Riaz et al. "A study of a computational BVP for heat transfer and friction drag in magnetohydrodynamics viscous flow of a nanofluid subject to the curved surface" . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING (2021) .
APA Khan, M. Riaz , Saleel, C. Ahamed , Saeed, Tareq , Allehiany, F. M. , El-Refaey, Adel M. , Jing, Dengwei et al. A study of a computational BVP for heat transfer and friction drag in magnetohydrodynamics viscous flow of a nanofluid subject to the curved surface . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING , 2021 .
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High efficiency photoelectrochemical hydrogen generation using eco-friendly Cu doped Zn-In-Se colloidal quantum dots EI SCIE
期刊论文 | 2021 , 88 | NANO ENERGY
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Abstract :

Photoelectrochemical (PEC) cells using colloidal quantum dots (QDs) as sensitizers are promising for efficient hydrogen (H-2) production, due to their low cost and to the size/shape/composition dependent optoelectronic properties of QDs. However, QDs that are typically used in PEC cell fabrication contain highly toxic heavy metals (e.g. Pb and Cd) cations, that limit commercial-scale applications. Herein, we synthesized eco-friendly Cu doped Zn-In-Se colloidal QDs and used them in PEC cells to efficiently produce H-2 from water. PEC cells fabricated with optimized Cu (5%) doped Zn-In-Se (Zn:In=1:4) QDs/TiO2 photoanodes yield an unprecedented saturated photocurrent density of 11.23 mA cm(-2) at 0.8 V vs. RHE under one sun illumination (AM 1.5, 100 mW.cm(-2)) and maintain similar to 60% of the initial photocurrent density value after 6000 s continuous illumination by using Na2S/Na2SO3 as hole scavenger. This new record value of photocurrent density from eco-friendly QDs based PEC cell demonstrates that an optimized amount of Cu dopant and Zn:In ratio significantly improves light absorption, carrier injection rates/lifetime and the spatial separation of electron-hole pairs. Our work indicates that Cu doped Zn-In-Se QDs can be used as efficient light harvesters to realize high efficiency, inexpensive and environmentally friendly solar-driven production of chemical fuels and other optoelectronic devices.

Keyword :

Photoelectrochemical cell Eco-friendly Quantum dots Carrier dynamics Hydrogen generation

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GB/T 7714 Luo, Bing , Liu, Jiabin , Guo, Heng et al. High efficiency photoelectrochemical hydrogen generation using eco-friendly Cu doped Zn-In-Se colloidal quantum dots [J]. | NANO ENERGY , 2021 , 88 .
MLA Luo, Bing et al. "High efficiency photoelectrochemical hydrogen generation using eco-friendly Cu doped Zn-In-Se colloidal quantum dots" . | NANO ENERGY 88 (2021) .
APA Luo, Bing , Liu, Jiabin , Guo, Heng , Liu, Xin , Song, Rui , Shen, Kai et al. High efficiency photoelectrochemical hydrogen generation using eco-friendly Cu doped Zn-In-Se colloidal quantum dots . | NANO ENERGY , 2021 , 88 .
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Whole Contact Line Pinning for Droplets Impacting on a Hydrophobic Surface Due to Hydrophilic TiO2 Nanoparticle Addition EI SCIE PubMed
期刊论文 | 2021 , 37 (22) , 6673-6680 | LANGMUIR
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Controlling droplet deposition on a hydrophobic surface has received much attention due to its wide applications. Addition of certain elements into a working droplet is a feasible way to improve drop deposition, which, however, often leads to a significant change in droplet spreading properties. In this work, we show that adding a small amount of hydrophilic TiO2 nanoparticles without any surfactant can significantly suppress the droplet rebound and even generate a whole contact line pinning on the hydrophobic surface. The whole contact line pinning is positively related to the Weber number (i.e., impact velocity) and suspension concentration. Specifically, when the suspension concentration exceeds a critical value, the pinning and droplet deposition occur in the same We range. A mechanism is proposed to explain the observed unique pinning and depinning behaviors, according to which the agglomerated TiO2 particles depositing at the triple line can change the wettability of the local surface, which leads to pinning, while the disturbance of capillary oscillation leads to depinning. Interestingly, a long-time whole contact line pinning for more than a second was observed under certain conditions. This work can be of value for many practical applications such as pesticide deposition and spray cooling.

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GB/T 7714 Li, Yang , Zhou, Jiandong , Hu, Meibing et al. Whole Contact Line Pinning for Droplets Impacting on a Hydrophobic Surface Due to Hydrophilic TiO2 Nanoparticle Addition [J]. | LANGMUIR , 2021 , 37 (22) : 6673-6680 .
MLA Li, Yang et al. "Whole Contact Line Pinning for Droplets Impacting on a Hydrophobic Surface Due to Hydrophilic TiO2 Nanoparticle Addition" . | LANGMUIR 37 . 22 (2021) : 6673-6680 .
APA Li, Yang , Zhou, Jiandong , Hu, Meibing , Jing, Dengwei . Whole Contact Line Pinning for Droplets Impacting on a Hydrophobic Surface Due to Hydrophilic TiO2 Nanoparticle Addition . | LANGMUIR , 2021 , 37 (22) , 6673-6680 .
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State-of-the-art progress in overall water splitting of carbon nitride based photocatalysts SCIE CSCD
期刊论文 | 2021 , 15 (3) , 600-620 | FRONTIERS IN ENERGY
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Converting solar energy into hydrogen (H-2) by photocatalytic water splitting is a promising approach to simultaneously address the increasing energy demand and environmental issues. Half decade has passed since the discovery of photo-induced water splitting phenomenon on TiO2 photoanode, while the solar to H-2 efficiency is still around 1%, far below the least industrial requirement. Therefore, developing efficient photocatalyst with a high energy conversion efficiency is still one of the main tasks to be overcome. Graphitic carbon nitride (g-C3N4) is just such an emerging and potential semiconductor. Therefore, in this review, the state-of-the-art advances in g-C3N4 based photocatalysts for overall water splitting were summarized in three sections according to the strategies used, and future challenges and new directions were discussed.

Keyword :

photocatalysis overall water splitting hydrogen carbon nitride

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GB/T 7714 Luo, Bing , Zhao, Yuxin , Jing, Dengwei . State-of-the-art progress in overall water splitting of carbon nitride based photocatalysts [J]. | FRONTIERS IN ENERGY , 2021 , 15 (3) : 600-620 .
MLA Luo, Bing et al. "State-of-the-art progress in overall water splitting of carbon nitride based photocatalysts" . | FRONTIERS IN ENERGY 15 . 3 (2021) : 600-620 .
APA Luo, Bing , Zhao, Yuxin , Jing, Dengwei . State-of-the-art progress in overall water splitting of carbon nitride based photocatalysts . | FRONTIERS IN ENERGY , 2021 , 15 (3) , 600-620 .
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Photothermal Effect Promoting Photocatalytic Process in Hydrogen Evolution over Graphene-Based Nanocomposite SCIE
期刊论文 | 2021 | TOPICS IN CATALYSIS
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Photocatalysts capable of utilizing full-spectrum solar energy for solar hydrogen evolution are highly appealing. Although graphene-based nanocomposites show certain photocatalytic characteristics due to its excellent conductivity, as a photothermal material, studies on its photothermal conversion effect have not been valued enough so far. Herein, reduced graphene oxide/TiO2 (rGO/TiO2) was synthesized for enhanced hydrogen evolution and photothermal conversion in the photocatalytic process. In our study, it was found that the 1.0 wt% reduced graphene oxide/TiO2 shows optimal hydrogen evolution rate of 7.82 mmol g(-1) h(-1) under the full spectrum irradiation of the solar light. Especially, through the infrared imaging camera, the synergistic photothermal effect for the graphene-based nanocomposite was directly revealed in a non-contact way. The temperature index T-k, indicating the temperature ratio between the gas phase inside and the outside surface of the reactor, was found to be increased by 13.92% corresponding to a 38.11% enhancement of the hydrogen evolution rates. Overall, this study could propose a new access to the photothermal of a graphene-based nanocomposites for its high performance of photocatalysis and promoting their applications in the solar energy conversion.

Keyword :

Temperature index Photocatalysis Photothermal effect Graphene

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GB/T 7714 Hu, Songwei , Geng, Jiafeng , Jing, Dengwei . Photothermal Effect Promoting Photocatalytic Process in Hydrogen Evolution over Graphene-Based Nanocomposite [J]. | TOPICS IN CATALYSIS , 2021 .
MLA Hu, Songwei et al. "Photothermal Effect Promoting Photocatalytic Process in Hydrogen Evolution over Graphene-Based Nanocomposite" . | TOPICS IN CATALYSIS (2021) .
APA Hu, Songwei , Geng, Jiafeng , Jing, Dengwei . Photothermal Effect Promoting Photocatalytic Process in Hydrogen Evolution over Graphene-Based Nanocomposite . | TOPICS IN CATALYSIS , 2021 .
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Heterojunction formed by TiO2 supported on lamellar La2NiO4 perovskite for enhanced visible-light-driven photocatalytic hydrogen production EI SCIE
期刊论文 | 2021 , 11 (3) | JOURNAL OF PHOTONICS FOR ENERGY
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In our work, UV-response with a small visible light absorption TiO2 nanoparticles were supported on lamellar La2NiO4 perovskite to build a type I heterojunction for efficient hydrogen production under visible light. It was found that, with the increase of La2NiO4 contents, the hydrogen production rates gradually increased and amounted to the highest value when the mass fraction of La2NiO4 was 8 wt. %, which is 39.5 times that of the initial La2NiO4 nanosheets without the cocatalyst Pt. When 1 wt. % Pt was loaded, the photocatalytic activity for the composite photocatalyst increased by 369.0 times that of the initial La2NiO4. Our work should be of value for the preparation of visible responsive heterojunction photocatalysts with high activity, fair stability, and low toxicity. (C) 2021 Society of Photo-Optical Instrumentation Engineers (SPIE)

Keyword :

semiconductor coupled modified layered perovskite oxide heterojunction photocatalytic

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GB/T 7714 Ma, Xinyu , Ai, Chaoqian , Cao, Jiamei et al. Heterojunction formed by TiO2 supported on lamellar La2NiO4 perovskite for enhanced visible-light-driven photocatalytic hydrogen production [J]. | JOURNAL OF PHOTONICS FOR ENERGY , 2021 , 11 (3) .
MLA Ma, Xinyu et al. "Heterojunction formed by TiO2 supported on lamellar La2NiO4 perovskite for enhanced visible-light-driven photocatalytic hydrogen production" . | JOURNAL OF PHOTONICS FOR ENERGY 11 . 3 (2021) .
APA Ma, Xinyu , Ai, Chaoqian , Cao, Jiamei , Li, Jinghua , Zhu, Yizhou , Jing, Dengwei . Heterojunction formed by TiO2 supported on lamellar La2NiO4 perovskite for enhanced visible-light-driven photocatalytic hydrogen production . | JOURNAL OF PHOTONICS FOR ENERGY , 2021 , 11 (3) .
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Analytical solution for temperature distribution in functionally graded cylindrical shells under convective cooling SCIE
期刊论文 | 2021 | MATHEMATICAL METHODS IN THE APPLIED SCIENCES
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In the current study, an analytical solution for the temperature distribution in a cylindrical shell that is made of functionally graded material is obtained. The general boundary condition is considered for achieving the solution, and particularly convective cooling plays the dominant role in this problem. The obtained solution is first verified against the numerical data, and then, the credibility of the solution for studying practical problems is tested employing two illustrative test cases with various boundary conditions. Parametric studies are done to evaluate some significant parameters, including material constant, boundary conditions, and convection on temperature distribution. It is seen that boundary condition plays a dominant role in the cooling rate. Material constant does not have a significant effect on the temperature distribution. The current study can be hired to better the design and production process of cylindrical shells made of functionally graded material.

Keyword :

cylindrical shell heat conduction functionally graded materials analytical solution convective cooling

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GB/T 7714 Emamian, Amin , Amiri Delouei, Amin , Karimnejad, Sajjad et al. Analytical solution for temperature distribution in functionally graded cylindrical shells under convective cooling [J]. | MATHEMATICAL METHODS IN THE APPLIED SCIENCES , 2021 .
MLA Emamian, Amin et al. "Analytical solution for temperature distribution in functionally graded cylindrical shells under convective cooling" . | MATHEMATICAL METHODS IN THE APPLIED SCIENCES (2021) .
APA Emamian, Amin , Amiri Delouei, Amin , Karimnejad, Sajjad , Jing, Dengwei . Analytical solution for temperature distribution in functionally graded cylindrical shells under convective cooling . | MATHEMATICAL METHODS IN THE APPLIED SCIENCES , 2021 .
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