In situ generated Pb nanoclusters on basic lead carbonate ultrathin nanoplates as an effective heterogeneous catalyst

CrystEngComm ◽  
2017 ◽  
Vol 19 (21) ◽  
pp. 2860-2869 ◽  
Author(s):  
Xiaoli Yu ◽  
Qi Diao ◽  
Xiaokai Zhang ◽  
Yong-Ill Lee ◽  
Hong-Guo Liu
Keyword(s):  
Heterogeneous Catalyst ◽  
Lead Carbonate ◽  
Basic Lead Carbonate

In situ and facile synthesis of silver nanoparticles on baby wipes and their applications in catalysis and SERS

RSC Advances ◽  
2016 ◽  
Vol 6 (6) ◽  
pp. 5016-5023 ◽  
Author(s):  
Bharat Baruah
Keyword(s):  
Silver Nanoparticles ◽  
Composite Materials ◽  
Heterogeneous Catalyst ◽  
Facile Synthesis ◽  
Sers Substrates ◽  
Efficient Heterogeneous Catalyst

Silver nanoparticles were immobilized on fibers to create composite materials. The composites are shown to be efficient heterogeneous catalyst with very good recyclability. These composite materials are also proven to be good SERS substrates.

Character of Lead Hydroxide and Basic Lead Carbonate

Nature ◽  
1964 ◽  
Vol 202 (4930) ◽  
pp. 386-387 ◽  
Author(s):  
G. TODD ◽  
E. PARRY
Keyword(s):  
Lead Carbonate ◽  
Lead Hydroxide ◽  
Basic Lead Carbonate

scholarly journals On metal and ‘spoiled’ wine: analysing psimythion (synthetic cerussite) pellets (5th–3rd centuries BCE) and hypothesising gas-metal reactions over a fermenting liquid within a Greek pot

2020 ◽  
Vol 12 (10) ◽  
Author(s):  
E. Photos-Jones ◽  
P. Bots ◽  
E. Oikonomou ◽  
A. Hamilton ◽  
C. W. Knapp
Keyword(s):  
Early Period ◽  
Mineralogical Composition ◽  
Acetic Acid Bacteria ◽  
Lead White ◽  
Lead Carbonate ◽  
White Pigment ◽  
Metallic Trace Elements ◽  
Basic Lead Carbonate ◽  
Key Drivers ◽  
Greek World

Abstract A Pb-based synthetic mineral referred to as psimythion (pl. psimythia) was manufactured in the Greek world at least since the 6th c BCE and routinely by the 4th c BCE. Theophrastus (On Stones, 56) describes its preparation from metallic Pb suspended over a fermenting liquid. Psimythion is considered the precursor of one of western art’s most prominent white pigments, i.e. lead white (basic lead carbonate or synthetic hydrocerussite). However, so far, and for that early period, published analyses of psimythia suggest that they consisted primarily of synthetic cerussite. In this paper, we set out to investigate how it was possible to manufacture pure cerussite, to the near exclusion of other phases. We examined the chemical and mineralogical composition (pXRF/XRD) of a small number of psimythion pellets found within ceramic pots (pyxis) from Athens and Boeotia (5th–4th c BCE) in the collection of the National Archaeological Museum (NAM), Athens. Analyses showed that the NAM pellets consisted primarily of Pb/cerussite with small amounts of Ca (some samples) and a host of metallic trace elements. We highlight the reference in the Theophrastus text to ‘spoiled wine’ (oxos), rather than ‘vinegar’, as has been previously assumed, the former including a strong biotic component. We carried out DNA sequencing of the pellets in an attempt to establish presence of microorganisms (Acetic Acid Bacteria). None was found. Subsequently, and as a working hypothesis, we propose a series of (biotic/abiotic) reactions which were likely to have taken place in the liquid and vapour phases and on the metal surface. The hypothesis aims to demonstrate that CO2 would be microbially induced and would increase, as a function of time, resulting in cerussite forming over and above hydrocerussite/other Pb-rich phases. Psimythion has for long been valued as a white pigment. What has perhaps been not adequately appreciated is the depth of empirical understanding from the part of psimythion manufacturers of the reactions between abiotic and biotic components within ‘oxos’/pot, as key drivers of minerals synthesis. Ultimately, psimythion manufacture may rest in understanding the nature of ‘oxos’, antiquity’s relatively little researched strongest acid.

Crystallographic Data - Basic Lead Carbonate, 2PbCo3-Pb(OH)2

1957 ◽  
Vol 29 (12) ◽  
pp. 1894-1894 ◽  
Author(s):  
Gerald. Katz ◽  
Robert. Lefker
Keyword(s):  
Crystallographic Data ◽  
Lead Carbonate ◽  
Basic Lead Carbonate

scholarly journals In situ study of metal leaching from Pd/Al2O3 induced by K2CO3

2020 ◽  
Vol 10 (2) ◽  
pp. 466-474 ◽  
Author(s):  
Mark A. Newton ◽  
Davide Ferri ◽  
Christopher J. Mulligan ◽  
Ivo Alxneit ◽  
Hermann Emerich ◽  
...  
Keyword(s):  
Fine Structure ◽  
Heterogeneous Catalyst ◽  
Metal Leaching ◽  
X Ray ◽  
In Situ Study ◽  
Absorption Fine ◽  
X Ray Absorption

In situ quick extended X-ray absorption fine structure spectroscopy (QEXAFS) was employed to study temporally and spatially the leaching of Pd from a heterogeneous catalyst caused by K2CO3.

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