Large-scale fabrication of porous YBO
            3
            hollow microspheres with tunable photoluminescence

Hollow lanthanide-doped compounds are some of the most popular materials for high-performance luminescent devices. However, it is challenging to find an approach that can fabricate large-scale and well-crystallized lanthanide-doped hollow structures and that is facile, efficient and of low cost. In this study, YBO 3 : Eu 3+ /Tb 3+ hollow microspheres were fabricated by using a novel multi-step transformation synthetic route for the first time with polystyrene spheres as the template, followed by the combination of a facile homogeneous precipitation method, an ion-exchange process and a calcination process. The results show that the as-obtained YBO 3 : Eu 3+ /Tb 3+ hollow spheres have a uniform morphology with an average diameter of 1.65 µm and shell thickness of about 160 nm. When used as luminescent materials, the emission colours of YBO 3 : Eu 3+ /Tb 3+ samples can be tuned from red, through orange, yellow and green-yellow, to green by simply adjusting the relative doping concentrations of the activator ions under the excitation of ultraviolet light, which might have potential applications in fields such as light display systems and optoelectronic devices.

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Uniform and Well-Dispersed LuBO3 Hollow Microspheres: Synthesis, Formation and Photoluminescence Properties

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2018.16391 ◽

2018 ◽

Vol 18 (12) ◽

pp. 8302-8306 ◽

Cited By ~ 2

Author(s):

Yu Gao ◽

Baotong Xu ◽

Feixue Ai ◽

Guiyan Zhao ◽

Yanfeng Bi ◽

...

Keyword(s):

Uv Light ◽

Exchange Process ◽

Hollow Spheres ◽

Average Diameter ◽

Hollow Microspheres ◽

Precipitation Method ◽

Ion Exchange Process ◽

Potential Applications ◽

First Time ◽

Display Systems

A hard template strategy is developed to fabricate the LuBO3: Eu3+/Tb3+ hollow microspheres using a novel multi-step transformation synthetic route for the first time with polystyrene (PS) spheres as the template, followed by the combination of a facile homogeneous precipitation method, an ion-exchange process, and a calcination process. The results show that the as-obtained LuBO3: Eu3+/Tb3+ hollow spheres have a uniform morphology with an average diameter of 1.8 μm and shell thickness of about 80 nm. When used as luminescent materials, the emission colors of LuBO3: Eu3+/Tb3+ samples can be tuned from red, through orange, yellow and green–yellow, to green by simply adjusting the relative doping concentrations of the activator ions under the excitation of ultraviolet (UV) light, which might have potential applications in the field such as light display systems and optoelectronic devices.

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Large-scale synthesis and luminescence of GdPO4 hollow microspheres

RSC Advances ◽

10.1039/c8ra04198a ◽

2018 ◽

Vol 8 (39) ◽

pp. 21857-21862 ◽

Cited By ~ 3

Author(s):

Yu Gao ◽

Yongkun Qiu ◽

Xin Wang ◽

Yanfeng Bi ◽

Guiyan Zhao ◽

...

Keyword(s):

Ion Exchange ◽

Large Scale ◽

Exchange Process ◽

Hollow Microspheres ◽

Precipitation Method ◽

Homogeneous Precipitation ◽

Calcination Process ◽

Ion Exchange Process ◽

Homogeneous Precipitation Method ◽

First Time

GdPO4 hollow microspheres were synthesized by using a novel multi-step route for the first time with polystyrene (PS) spheres as the template, followed by the combination of a facile homogeneous precipitation method, an ion-exchange process, and a calcination process.

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Synthesis and luminescent properties of uniform monodisperse LuPO 4 :Eu 3+ /Tb 3+ hollow microspheres

Royal Society Open Science ◽

10.1098/rsos.171451 ◽

2017 ◽

Vol 4 (12) ◽

pp. 171451 ◽

Cited By ~ 7

Author(s):

Yu Gao ◽

He Yu ◽

Cheng Shi ◽

Guiyan Zhao ◽

Yanfeng Bi ◽

...

Keyword(s):

Large Scale ◽

Exchange Process ◽

Scale Up ◽

Luminescent Properties ◽

Inorganic Materials ◽

Hollow Microspheres ◽

Scale Production ◽

Simple Method ◽

Synthetic Process ◽

Ion Exchange Process

Uniform monodisperse LuPO 4 :Eu 3+ /Tb 3+ hollow microspheres with diameters of about 2.4 µm have been successfully synthesized by the combination of a facile homogeneous precipitation approach, an ion-exchange process and a calcination process. The possible formation mechanism for the hollow microspheres was presented. Furthermore, the luminescence properties revealed that the LuPO 4 :Eu 3+ and LuPO 4 :Tb 3+ phosphors show strong orange-red and green emissions under ultraviolet excitation, respectively, which endows this material with potential application in many fields, such as light display systems and optoelectronic devices. Since the synthetic process can be carried out at mild conditions, it should be straightforward to scale up the entire process for large-scale production of the LuPO 4 hollow microspheres. Furthermore, this general and simple method may be of much significance in the synthesis of many other inorganic materials.

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Process Design Kit and Design Automation for Flexible Hybrid Electronics

Journal of Microelectronics and Electronic Packaging ◽

10.4071/imaps.925849 ◽

2019 ◽

Vol 16 (3) ◽

pp. 117-123

Author(s):

Tsung-Ching Huang ◽

Ting Lei ◽

Leilai Shao ◽

Sridhar Sivapurapu ◽

Madhavan Swaminathan ◽

...

Keyword(s):

Process Design ◽

Design Automation ◽

High Performance ◽

Large Scale ◽

Low Cost ◽

Thin Film Transistor ◽

Solution Process ◽

Oxide Semiconductor ◽

Wearable Electronics ◽

Wide Range

Abstract High-performance low-cost flexible hybrid electronics (FHE) are desirable for applications such as internet of things and wearable electronics. Carbon nanotube (CNT) thin-film transistor (TFT) is a promising candidate for high-performance FHE because of its high carrier mobility, superior mechanical flexibility, and material compatibility with low-cost printing and solution processes. Flexible sensors and peripheral CNT-TFT circuits, such as decoders, drivers, and sense amplifiers, can be printed and hybrid-integrated with thinned (<50 μm) silicon chips on soft, thin, and flexible substrates for a wide range of applications, from flexible displays to wearable medical devices. Here, we report (1) a process design kit (PDK) to enable FHE design automation for large-scale FHE circuits and (2) solution process-proven intellectual property blocks for TFT circuits design, including Pseudo-Complementary Metal-Oxide-Semiconductor (Pseudo-CMOS) flexible digital logic and analog amplifiers. The FHE-PDK is fully compatible with popular silicon design tools for design and simulation of hybrid-integrated flexible circuits.

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Recent progress in zinc-based redox flow batteries: a review

Journal of Physics D Applied Physics ◽

10.1088/1361-6463/ac4182 ◽

2021 ◽

Author(s):

Guixiang Wang ◽

Haitao Zou ◽

Xiaobo Zhu ◽

Mei Ding ◽

Chuankun Jia

Keyword(s):

High Performance ◽

Large Scale ◽

Electrode Materials ◽

Low Cost ◽

Ion Selectivity ◽

Commercial Application ◽

Environmental Friendliness ◽

Membrane Materials ◽

Redox Flow Batteries ◽

Flow Batteries

Abstract Zinc-based redox flow batteries (ZRFBs) have been considered as ones of the most promising large-scale energy storage technologies owing to their low cost, high safety, and environmental friendliness. However, their commercial application is still hindered by a few key problems. First, the hydrogen evolution and zinc dendrite formation cause poor cycling life, of which needs to ameliorated or overcome by finding suitable anolytes. Second, the stability and energy density of catholytes are unsatisfactory due to oxidation, corrosion, and low electrolyte concentration. Meanwhile, highly catalytic electrode materials remain to be explored and the ion selectivity and cost efficiency of membrane materials demands further improvement. In this review, we summarize different types of ZRFBs according to their electrolyte environments including ZRFBs using neutral, acidic, and alkaline electrolytes, then highlight the advances of key materials including electrode and membrane materials for ZRFBs, and finally discuss the challenges and perspectives for the future development of high-performance ZRFBs.

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Three-Dimensional MoS2/Graphene Hybrid Aerogel as Free-Standing, High-Performance Electrode for Supercapacitor

NANO ◽

10.1142/s1793292020500629 ◽

2020 ◽

Vol 15 (05) ◽

pp. 2050062

Author(s):

Zhaolei Meng ◽

Xiaojian He ◽

Song Han ◽

Zijian Hu

Keyword(s):

Porous Structure ◽

Surface Area ◽

High Performance ◽

Large Scale ◽

Low Cost ◽

Hydrothermal Process ◽

Three Dimensional ◽

Rate Capability ◽

Free Standing ◽

Hybrid Aerogel

Carbon materials are generally employed as supercapacitor electrodes due to their low- cost, high-chemical stability and environmental friendliness. However, the design of carbon structures with large surface area and controllable porous structure remains a daunt challenge. In this work, a three-dimensional (3D) hybrid aerogel with different contents of MoS2 nanosheets in 3D graphene aerogel (MoS2-GA) was synthesized through a facial hydrothermal process. The influences of MoS2 content on microstructure and subsequently on electrochemical properties of MoS2-GA are systematically investigated and an optimized mass ratio with MoS2: GA of 1:2 is chosen to achieve high mechanical robustness and outstanding electrochemical performance in the hybrid structure. Due to the large specific surface area, porous structure and continuous charge transfer network, such MoS2-GA electrodes exhibit high specific capacitance, good rate capability and excellent cyclic stability, showing great potential in large-scale and low-cost fabrication of high-performance supercapacitors.

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Low-cost, large-scale, one-pot synthesis of C/Ni3(NO3)2(OH)4 composites for high performance supercapacitor

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2018.06.082 ◽

2018 ◽

Vol 217 ◽

pp. 291-299 ◽

Cited By ~ 4

Author(s):

Yingyuan Zhao ◽

Nian Jiang ◽

Xu Zhang ◽

Jing Guo ◽

Yanqiang Li ◽

...

Keyword(s):

High Performance ◽

Large Scale ◽

Low Cost ◽

One Pot ◽

One Pot Synthesis

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Green Preparation of Fluorescent Carbon Quantum Dots from Cyanobacteria for Biological Imaging

Polymers ◽

10.3390/polym11040616 ◽

2019 ◽

Vol 11 (4) ◽

pp. 616 ◽

Cited By ~ 12

Author(s):

Xi Wang ◽

Pei Yang ◽

Qian Feng ◽

Taotao Meng ◽

Jing Wei ◽

...

Keyword(s):

Quantum Dots ◽

Carbon Source ◽

Large Scale ◽

Low Cost ◽

Average Diameter ◽

Carbon Quantum Dots ◽

Water Soluble ◽

High Concentration ◽

Wide Range ◽

Low Cytotoxicity

Biomass-based carbon quantum dots (CQDs) have become a significant carbon materials by their virtues of being cost-effective, easy to fabricate and low in environmental impact. However, there are few reports regarding using cyanobacteria as a carbon source for the synthesis of fluorescent CQDs. In this study, the low-cost biomass of cyanobacteria was used as the sole carbon source to synthesize water-soluble CQDs by a simple hydrothermal method. The synthesized CQDs were mono-dispersed with an average diameter of 2.48 nm and exhibited excitation-dependent emission performance with a quantum yield of 9.24%. Furthermore, the cyanobacteria-derived CQDs had almost no photobleaching under long-time UV irradiation, and exhibited high photostability in the solutions with a wide range of pH and salinity. Since no chemical reagent was involved in the synthesis of CQDs, the as-prepared CQDs were confirmed to have low cytotoxicity for PC12 cells even at a high concentration. Additionally, the CQDs could be efficiently taken up by cells to illuminate the whole cell and create a clear distinction between cytoplasm and nucleus. The combined advantages of green synthesis, cost-effectiveness and low cytotoxicity make synthesized CQDs a significant carbon source and broaden the application of cyanobacteria and provide an economical route to fabricate CQDs on a large scale.

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Towards High Performance Chemical Vapour Deposition V2O5 Cathodes for Batteries Employing Aqueous Media

Molecules ◽

10.3390/molecules25235558 ◽

2020 ◽

Vol 25 (23) ◽

pp. 5558

Author(s):

Dimitra Vernardou ◽

Charalampos Drosos ◽

Andreas Kafizas ◽

Martyn E. Pemble ◽

Emmanouel Koudoumas

Keyword(s):

Energy Storage ◽

High Performance ◽

Large Scale ◽

Electrode Materials ◽

Low Cost ◽

Aqueous Media ◽

Chemical Vapour ◽

Cost Effective ◽

Scale Production ◽

Environmentally Safe

The need for clean and efficient energy storage has become the center of attention due to the eminent global energy crisis and growing ecological concerns. A key component in this effort is the ultra-high performance battery, which will play a major role in the energy industry. To meet the demands in portable electronic devices, electric vehicles, and large-scale energy storage systems, it is necessary to prepare advanced batteries with high safety, fast charge ratios, and discharge capabilities at a low cost. Cathode materials play a significant role in determining the performance of batteries. Among the possible electrode materials is vanadium pentoxide, which will be discussed in this review, due to its low cost and high theoretical capacity. Additionally, aqueous electrolytes, which are environmentally safe, provide an alternative approach compared to organic media for safe, cost-effective, and scalable energy storage. In this review, we will reveal the industrial potential of competitive methods to grow cathodes with excellent stability and enhanced electrochemical performance in aqueous media and lay the foundation for the large-scale production of electrode materials.

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