28,417 research outputs found
Synthesis of 8-MnO2 via ozonation routine for low temperature formaldehyde removal
No full textNowadays, it is still a challenge to prepared high efficiency and low cost formaldehyde (HCHO) removal catalysts in order to tackle the long-living indoor air pollution. Herein, 8MnO2 is successfully synthesized by a facile ozonation strategy, where Mn2 + is oxidized by ozone (O3 ) bubble in an alkaline solution. It presents one of the best catalytic properties with a low 100% conversion temperature of 85 degrees C for 50 ppm of HCHO under a GHSV of 48,000 mL/(g center dot hr). As a comparison, more than 6 times far longer oxidation time is needed if O3 is replaced by O2 . Characterizations show that ozonation process generates a different intermediate of tetragonal fi-HMnO2 , which would favor the quick transformation into the final product 8-MnO2 , as compared with the relatively more thermodynamically stable monoclinic y-HMnO2 in the O2 process. Finally, HCHO is found to be decomposed into CO2 via formate, dioxymethylene and carbonate species as identified by room temperature insitu diffuse reflectance infrared fourier transform spectroscopy. All these results show great potency of this facile ozonation routine for the highly active 8-MnO2 synthesis in order to remove the HCHO contamination. (c) 2024 The Research Center for Eco-Environmental Sciences, Chinese Academy o
Silicone rubber/hollow silica spheres composites with enhanced mechanical and electrical insulating performances
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In this work, an experimental study was conducted to improve mechanical and electrical insulating properties of room temperature vulcanized silicone rubber (RTVSR) matrix by incorporating hollow silica spheres (HSS). The results showed that the addition of 5.0 wt% HSS in the RTVSR matrix noticeably improved the tensile strength. The volume resistivity of RTVSR nearly increased by one order of magnitude and the DC breakdown strength of RTVSR almost doubled when 5.0 wt% HSS were added. In contrast, commercial fumed silica (FS) with nanometre size showed relatively weak enhancing effects on RTVSR both in mechanical and electrical insulating performances at the same loading. (C) 2017 Elsevier B.V. All rights reserved.</p
Chen Chen, 42nd Annual ODU Literary Festival
No full textChen Chen is the author of When I Grow Up I Want to Be a List of Further Possibilities (BOA Editions, 2017), which was long-listed for the National Book Award and won the Thom Gunn Award, among other honors. Bloodaxe Books published a UK edition in June. He is also the author of four chapbooks, most recently You MUST Use the Word Smoothie (Sundress Publications, 2019) and Gesundheit! (in collaboration with Sam Herschel Wein and forthcoming from Glass Poetry Press, fall 2019). His work appears in many publications, including Poem-a-Day, The Massachusetts Review, The Best American Poetry, and The Best American Nonrequired Reading. He has received a Pushcart Prize and fellowships from Kundiman and the National Endowment for the Arts. He holds an MFA from Syracuse University and a PhD from Texas Tech University. He teaches at Brandeis University as the Jacob Ziskind Poet-in-Residence and co-runs the journal, Underblong. He lives in Waltham, Massachusetts, with his partner, Jeff Gilbert, and their pug, Mr. Rupert Gile
Controllable Synthesis of Different MnO<sub>2</sub> Phases by a Precipitation Method for Effective Ozone Decomposition
No full textIt is challenging to controllably synthesize manganese dioxide (MnO2) in a facile routine for structure-oriented applications. Herein, gamma-, alpha-, amorphous (a-), and delta-MnO2 are synthesized by the same liquid phase precipitation of KMnO4 and MnSO4 with tailored pH by KOH dosage and pH = 1 HCl washing. An ozone decomposition reaction is adopted as the catalytic activity evaluation probe, and a-MnO2 showed high efficiency of 80-90% to 100 ppm ozone during a 10 h test at weight hours space velocity of 1,200,000 mL g(-1) h(-1). The high activity can be attributed to its high specific surface area, low average Mn oxidation state, and abundant surface oxygen vacancy content. In addition, the activity decrease of a-MnO2 can be attributed to the accumulation of oxygen intermediates, as illustrated by in situ infrared spectroscopy, which however can be reactivated by simple 60 degrees C oven heating. These results provide a facile way to controllably synthesize differently crystallized MnO2, especially for highly efficient ozone decomposition catalysts
Supporting data used in the paper: Xi Chen, 2020, The LMARS based shallow-water dynamical core on generic gnomonic cubed-sphere geometry
No full text# Simulation results of the unstaggered shallow water model
This repository contains the supporting data used in the paper: Xi Chen, 2020, The LMARS based shallow‐water dynamical core on generic gnomonic cubed‐sphere geometry, DOI: 10.1029/2020MS002280
Organization of the repository:
The tar archive with this data submission has a:
doc directory contains a README.md with information regarding naming conventions to label the model configurations for a shallow water test simulation. Additional information can also be found in README.md. Table 4 in the paper provides additional details.
The data directory contains the supporting data files (NetCDF format).Disclaimer: "This was prepared by Xi Chen under award NA18OAR4320123 from the National Oceanic and Atmospheric Administration, U.S. Department of Commerce. The statements, findings, conclusions, and recommendations are those of the author(s) and do not necessarily reflect the views of the National Oceanic and Atmospheric Administration, or the U.S. Department of Commerce.
Artimpaza brevilineata Tian & Chen, 2012 in Tian, Chen & Li 2012
No full textArtimpaza brevilineata Tian & Chen, 2012 in Tian, Chen & Li, 2012: 43, figs. 1–9. (Figs. 28a, b) Type locality: China, Yunnan, Pu’er City, Yutang. Gender: female. Date collected: 2011.V.25 (2010.V.25, in the original description, is incorrect). Collector: Li-Chao TIAN & Gui-Qiang HUANG. Paratypes: 1 female, China, Yunnan, Lincang City, 1980.VI.1, Fen LIU leg. Remarks: In the original description, the type locality is “ Yunnan, Jinghong” while it is “ Yunnan, Yutang” according to the label. “Yutang” is actually in Pu’er, not Jinghong. The first author described the type locality by mistake. In the original description, the collector was only listed as Li-Chao TIAN, which was a mistake.Published as part of Li, Zhu & Chen, Li, 2020, Primary types of longhorned beetles (Coleoptera, Cerambycidae, Vesperidae and Disteniidae) of Southwest University (SWU), pp. 25-46 in Zootaxa 4718 (1) on page 33, DOI: 10.11646/zootaxa.4718.1.2, http://zenodo.org/record/360220
Author contributions
No full textPlease browse the "Files" tag to access the appendix specifying the author - Chen Hsi Tsai's contributions to the seven papers included in the thesis
Ying Chen\u27s Impressions of Summer
No full textChapbook of narrative/personal poems by Ying Chen originally published by Finishing Line Press in 2013. Translated from the French by Peter Schulman, ODU Professor of French and International Studies.https://digitalcommons.odu.edu/worldlanguages_books/1016/thumbnail.jp
《在中法之间 — 陈伟农的艺术体验》 Zai Zhong Fa zhi jian: Chen Weinong de yishu tijian / “Between China and France. The Artistic Experience of Chen Weinong”
No full textThe author analizes the artistic production of the Chinese contemporary artist Chen Weinong, who has travelled between China and France for more ten years. In his ink paintings and calligraphies, Chen Weinong reflects the essence of both Western and Eastern cultures, succeeding in refreshing the ancient tradition as well as blazing new trails in Chinese art
Co-templating synthesis of mesoporous hollow silica spheres and their application in catalytic oxidation with low Pt loading
No full textMesoporous hollow silica spheres (MHSS) with uniform size were successfully prepared by introducing monodispersed polystyrene (PS) spheres as hard template and selected surfactant as soft template in acid condition. With assistance of different surfactants, a series of mesoporous shells were created and the used surfactants have a significant effect on the structural properties of MHSS. The highest surface area was 690.3 m(2) g(-1) on the MHSS which was achieved by using P123 as a soft template. The MHSS was further used for loading active Pt through the reaction between chloroplatinic acid or and sodium borohydride. The as -prepared Pt/MHSS catalyst exhibited high activity for VOCs' deep oxidation. (C) 2016 Elsevier B.V. All rights reserved
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