SEARCH · Search NASA

Results for “HgOs”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

SourceResearch connectionFrom yearThrough year

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

2 records

All sources NASA NTRS DOE OSTI

DOE OSTI2020

Materials Data on HgOs by Materials Project

OsHg crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Os2- is bonded to six equivalent Os2- and six equivalent Hg2+ atoms to form OsHg6Os6 cuboctahedra that share corners with eighteen equivalent OsHg6Os6 cuboctahedra, edges with six equivalent OsHg6Os6 cuboctahedra, edges with twelve equivalent HgHg6Os6 cuboctahedra, faces with eight equivalent OsHg6Os6 cuboctahedra, and faces with twelve equivalent HgHg6Os6 cuboctahedra. All Os–Os bond lengths are 2.89 Å. All Os–Hg bond lengths are 2.92 Å. Hg2+ is bonded to six equivalent Os2- and six equivalent Hg2+ atoms to form HgHg6Os6 cuboctahedra that share corners with eighteen equivalent HgHg6Os6 cuboctahedra, edges with six equivalent HgHg6Os6 cuboctahedra, edges with twelve equivalent OsHg6Os6 cuboctahedra, faces with eight equivalent HgHg6Os6 cuboctahedra, and faces with twelve equivalent OsHg6Os6 cuboctahedra. All Hg–Hg bond lengths are 2.89 Å.

36 MATERIALS SCIENCE↗

DOE OSTI2026

Stable yet hydrophilic graphene oxide nanomembranes by zwitterionic reduction for dye desalination

Holey graphene oxide (HGO) nanosheets have emerged as a promising membrane platform for dye desalination, and they must be reduced to enhance hydrophobicity and stability for long-term underwater operation, which usually decreases water and salt permeance. Herein, we develop a facile method to stabilize HGO nanosheets while retaining their hydrophilicity by reducing them with sulfobetaine amine (SBAm, a superhydrophilic zwitterion), achieving high water and salt permeance and a high salt/dye separation factor. Specifically, HGO nanosheets react with SBAm via an amine-epoxide reaction, rendering reduced HGO nanosheets containing superhydrophilic zwitterions. The effects of in-plane pores, zwitterion content, and layer thickness on the membrane chemistry, structure, and salt/dye separation properties of the SBAm-reduced HGOs (SHGOs) are thoroughly examined. The membrane achieves a Na 2 SO 4 /Direct red separation factor of up to 850, surpassing the state-of-the-art GO membranes. Moreover, hollow fiber membrane modules based on SHGOs are fabricated and exhibit stable performance in multi-cycle tests over 100 h of operation with mixed dye-salt solutions, demonstrating the scalability of our approach and its potential for practical applications.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗