Application of CuS-functionalized ZnO nanoflakes for a paper-based photoelectrochemical immunoassay using an in situ electron donor producing strategy

2015 ◽  
Vol 39 (9) ◽  
pp. 7012-7018 ◽  
Author(s):  
Guoqiang Sun ◽  
Hongmei Yang ◽  
Chao Ma ◽  
Yan Zhang ◽  
Jinghua Yu ◽  
...  
Keyword(s):  
Electron Donor ◽  
Copper Sulfide ◽  
Zno Nanoflakes ◽  
Photoelectrochemical Immunoassay

Copper sulfide functionalized ZnO nanoflakes were used to construct a paper-based photoelectrochemical immunosensor using an in situ electron donor producing strategy.

scholarly journals Converting copper sulfide to copper with surface sulfur for electrocatalytic alkyne semi-hydrogenation with water

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yongmeng Wu ◽  
Cuibo Liu ◽  
Changhong Wang ◽  
Yifu Yu ◽  
Yanmei Shi ◽  
...  
Keyword(s):  
Binding Energy ◽  
Noble Metal ◽  
Atomic Hydrogen ◽  
Copper Sulfide ◽  
Low Cost ◽  
Water Electrolysis ◽  
Metal Free ◽  
Copper Nanowire

AbstractElectrocatalytic alkyne semi-hydrogenation to alkenes with water as the hydrogen source using a low-cost noble-metal-free catalyst is highly desirable but challenging because of their over-hydrogenation to undesired alkanes. Here, we propose that an ideal catalyst should have the appropriate binding energy with active atomic hydrogen (H*) from water electrolysis and a weaker adsorption with an alkene, thus promoting alkyne semi-hydrogenation and avoiding over-hydrogenation. So, surface sulfur-doped and -adsorbed low-coordinated copper nanowire sponges are designedly synthesized via in situ electroreduction of copper sulfide and enable electrocatalytic alkyne semi-hydrogenation with over 99% selectivity using water as the hydrogen source, outperforming a copper counterpart without surface sulfur. Sulfur anion-hydrated cation (S2−-K+(H2O)n) networks between the surface adsorbed S2− and K+ in the KOH electrolyte boost the production of active H* from water electrolysis. And the trace doping of sulfur weakens the alkene adsorption, avoiding over-hydrogenation. Our catalyst also shows wide substrate scopes, up to 99% alkenes selectivity, good reducible groups compatibility, and easily synthesized deuterated alkenes, highlighting the promising potential of this method.

scholarly journals Potential forMethanosarcinato contribute to uranium reduction during acetate-promoted groundwater bioremediation

2017 ◽  
Author(s):  
Dawn E Holmes ◽  
Roberto Orelana ◽  
Ludovic Giloteaux ◽  
Li-Ying Wang ◽  
Pravin Shrestha ◽  
...  
Keyword(s):  
Field Experiment ◽  
Electron Donor ◽  
Enrichment Culture ◽  
Cell Suspensions ◽  
Contaminated Groundwater ◽  
Subunit A ◽  
Sedimentary Environments

AbstractPrevious studies ofin situbioremediation of uranium-contaminated groundwater with acetate injections have focused on the role ofGeobacterspecies in U(VI) reduction because of a lack of other abundant known U(VI)-reducing microorganisms. Monitoring the levels of methyl CoM reductase subunit A (mcrA) transcripts during an acetate-injection field experiment demonstrated that acetoclastic methanogens from the genusMethanosarcinawere enriched after 40 days of acetate amendment. The increased abundance ofMethanosarcinacorresponded with an accumulation of methane in the groundwater. An enrichment culture dominated by aMethanosarcinaspecies with the sameMethanosarcina mcrAsequence that predominated in the field experiment could effectively convert acetate to methane. In order to determine whetherMethanosarcinaspecies could be participating in U(VI) reduction in the subsurface, cell suspensions ofM. barkeriwere incubated in the presence of U(VI) with acetate provided as the electron donor. U(VI) was reduced by metabolically activeM. barkericells, however, no U(VI) reduction was observed in inactive controls. These results demonstrate thatMethanosarcinaspecies could play an important role in the long-term bioremediation of uranium-contaminated aquifers after depletion of Fe(III) oxides limits the growth ofGeobacterspecies. The results also suggest thatMethanosarcinahave the potential to influence uranium geochemistry in a diversity of anaerobic sedimentary environments.

scholarly journals Panoramic Visualization of Lithiation of Copper Sulfide by In Situ STEM

2018 ◽  
Vol 24 (S1) ◽  
pp. 1498-1499
Author(s):  
Kai He ◽  
Sungkyu Kim ◽  
Sooyeon Hwang ◽  
Dong Su
Keyword(s):  
Copper Sulfide

Copper sulfide nanostripe patterns at the Au(111)/electrolyte interface studied by in situ STM

2007 ◽  
Vol 9 (17) ◽  
pp. 2142 ◽  
Author(s):  
Daniel Friebel ◽  
Christian Schlaup ◽  
Peter Broekmann ◽  
Klaus Wandelt
Keyword(s):  
Copper Sulfide ◽  
Electrolyte Interface ◽  
In Situ Stm

Polyhydroxyalkanoate (PHB) as a slow-release electron donor for advanced in situ bioremediation of chlorinated solvent-contaminated aquifers

2014 ◽  
Vol 31 (4) ◽  
pp. 377-382 ◽  
Author(s):  
Massimiliano Baric ◽  
Lucia Pierro ◽  
Biancamaria Pietrangeli ◽  
Marco Petrangeli Papini
Keyword(s):  
Electron Donor ◽  
Slow Release ◽  
In Situ Bioremediation ◽  
Chlorinated Solvent ◽  
Contaminated Aquifers
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