scholarly journals Green-Synthesized Phosphorescent Carbon Dot Composite for Multilevel Anti-Counterfeiting

2021 ◽  
Author(s):  
wenjie Jiang ◽  
Lan Liu ◽  
Yueyue Wu ◽  
Peng Zhang ◽  
Feiyang Li ◽  
...  
Keyword(s):  
Room Temperature ◽  
Environmentally Friendly ◽  
Carbon Dot

Room temperature phosphorescent (RTP) materials are rising and gaining considerable attention due to their special photo capture-release ability. Herein, a kind of environmentally friendly RTP C composite was devised by...

Morphology Evolution and Luminescence Properties of YF3: Sm Nano-/Microcrystals

2012 ◽  
Vol 463-464 ◽  
pp. 112-118
Author(s):  
Feng Tao ◽  
Geng Zhu ◽  
Zhi Jun Wang ◽  
Feng Pan ◽  
Yu Feng Sun ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Growth Mechanism ◽  
Room Temperature ◽  
Red Light ◽  
Environmentally Friendly ◽  
Morphology Evolution ◽  
Flat Panel Display ◽  
Flat Panel ◽  
Display Devices ◽  
Potential Applications

Abstract. Recently, there has been increasting interest in the doping of nano-/microcrystal hosts with Sm3+. However, very few examples of Sm3+doped YF3-based nanophosphors have been reported. In this paper, a variety of uniform YF3:Sm nano-/microcrystals have been successfully prepared by a facile, effective, and environmentally friendly hydrothermal method. The morphology evolution process has been investigated by quenching the reaction at different time. Based on the results, a possible growth mechanism is presented in detail. The as-obtained YF3:Sm nano-/microcrystals show strong yellow and red light emissions under room temperature, which is quite different from those reported previously and might find potential applications in fields such as light phosphor powers and advanced flat panel display devices.

scholarly journals Environmentally friendly and facile synthesis of Rh nanoparticles at room temperature by alkaline ethanol solution and their application for ethanol electrooxidation

RSC Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 3161-3169 ◽  
Author(s):  
Fuhai Li ◽  
Hanqin Weng ◽  
Yun Shang ◽  
Zuoming Ding ◽  
Zheng Yang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Environmentally Friendly ◽  
Ethanol Solution ◽  
Ethanol Electrooxidation ◽  
Synthetic Route ◽  
Facile Synthesis

A facile, fact and green synthetic route was developed to prepare Rh nanoparticles at room temperature.

Aggregation-Induced Room-Temperature Phosphorescence Obtained from Water-Dispersible Carbon Dot-Based Composite Materials

2020 ◽  
Vol 12 (9) ◽  
pp. 10791-10800 ◽  
Author(s):  
Chan Wang ◽  
Yueyue Chen ◽  
Yalan Xu ◽  
Guoxia Ran ◽  
Yimin He ◽  
...  
Keyword(s):  
Composite Materials ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Carbon Dot ◽  
Water Dispersible

scholarly journals The synthesis of highly active carbon dot-coated gold nanoparticles via the room-temperature in situ carbonization of organic ligands for 4-nitrophenol reduction

RSC Advances ◽  
2020 ◽  
Vol 10 (33) ◽  
pp. 19419-19424
Author(s):  
Yue Zhu ◽  
Juan Du ◽  
Qianqian Peng ◽  
Fengyi Wang ◽  
Jing Hu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Active Carbon ◽  
Room Temperature ◽  
Organic Ligands ◽  
Carbon Dot ◽  
Highly Active ◽  
Nitrophenol Reduction ◽  
In Situ Carbonization

Due to the serious pollution issue caused by 4-nitrophenol (4-NP), it is of great importance to design effective catalysts for its reduction.

Organic Based Heat Stabilizers for PVC: A Safer and more Environmentally Friendly Alternatives

2015 ◽  
Vol 659 ◽  
pp. 321-326 ◽  
Author(s):  
Aran Asawakosinchai ◽  
Chanchra Jubsilp ◽  
Sarawut Rimdusit
Keyword(s):  
Room Temperature ◽  
New Technology ◽  
Environmentally Friendly ◽  
Mechanical Analysis ◽  
Pipe Production ◽  
Short Term ◽  
Zinc Compounds ◽  
Heat Stabilizer ◽  
Pvc Pipe ◽  
Potential Use

Organic based stabilizers have been considered as a new technology providing environmentally friendly heat stabilizer for PVC pipe production to substitute conventional lead stabilizer as well as calcium zinc stabilizer. In this research, PVC samples stabilized with 5 types of heat stabilizers i.e. 1) commercial lead stabilizer, 2) commercial calcium zinc stabilizer, 3) commercial organic based stabilizer (OBS), 4) 1,3-dimetyl-6-aminouracil (DAU) and 5) eugenol, were investigated. From dynamic mechanical analysis, storage modulus at room temperature of PVC stabilized with DAU was found to provide the highest value among those stabilizers. Glass transition temperature of the PVC stabilized with all types of heat stabilizers was determined to be approximately 99°C except the value of about 89°C in eugenol stabilized PVC. Furthermore, PVC stabilized with commercial lead, calcium zinc stabilizer and commercial OBS could be reprocessed up to at least 5 cycles. Whereas, PVC stabilized with DAU was found to be able to withstand the processing cycle up to 4 cycles. Additionally, PVC stabilized with DAU showed the most outstanding short term thermal stability and can maintain its original color for at least up to 4 processing cycles. Finally, repeated processing of PVC stabilized with each type of heat stabilizers showed negligible effect on mechanical properties for at least up to 3 processing cycles. From the above results, it is evident that DAU showed high potential use as a safe and effective organic based heat stabilizer for PVC to substitute traditional lead or calcium zinc compounds.

Color tunable room temperature phosphorescent carbon dot based nanocomposites obtainable from multiple carbon sources via a molten salt method

Nanoscale ◽  
2019 ◽  
Vol 11 (24) ◽  
pp. 11967-11974 ◽  
Author(s):  
Chan Wang ◽  
Yueyue Chen ◽  
Tantan Hu ◽  
Yong Chang ◽  
Guoxia Ran ◽  
...  
Keyword(s):  
Charge Density ◽  
Molten Salt ◽  
Room Temperature ◽  
Carbon Sources ◽  
Molten Salt Method ◽  
Carbon Dot ◽  
Long Wavelength ◽  
Color Tunable ◽  
Long Lifetime

The structural confinement and charge density engineering of molten salt endorsed CD-based room temperature phosphorescent (RTP) nanocomposites with long-lifetime, long-wavelength and excitation-dependent RTP.

scholarly journals Pengendalian serangan rayap tanah pada bebak gewang menggunakan bahan pengawet alami ekstrak tuba (Derris elliptica)

1996 ◽  
Vol 13 (2) ◽  
pp. 117-122
Author(s):  
Sigit B. Prabawa ◽  
◽  
Ermi E. Koeslulat ◽  
W.O. Muliastuty ◽  
Keyword(s):  
Room Temperature ◽  
Environmentally Friendly ◽  
Natural Preservative ◽  
Extract Solution ◽  
Natural Preservatives ◽  
Class Iv

People from East Nusa Tenggara generally use gewang midribs for walls and ceilings. However this midribs contains ingredients that can be attacked by organisms such as soil termites. To overcome this, preservation action is needed. Conventional preservatives commonly contain ingredients that are less environmentally friendly, expensive and not easily available. Therefore, it is necessary to find a natural preservative from the species more suitable for people. The purpose of this study was to obtain data about the effect of the concentration of natural preservatives from Tuba extract on the gewang midribs. Tuba extract was obtained through the maceration using methanol. Preservation was carried out by soaking the Gewang midribs samples in to tuba extract solution with the consentration (gr/liter) of 0 (control), 4, 9, 16, 25 and 36 for 24 hours at room temperature. The effectiveness of preservatives was done using soil termites test. The results showed that tuba extract had a very significant effect on decreasing the weight of the sample and increasing the quality of gewang midribs from class IV to II. It is recommended that preserving gewang midribs can use tuba extract with a concentration at least of 4 gr/liter of water.

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