{"id":308,"date":"2015-07-23T09:56:34","date_gmt":"2015-07-23T16:56:34","guid":{"rendered":"http:\/\/saunderslab.chem.wsu.edu\/?page_id=308"},"modified":"2015-07-23T09:56:34","modified_gmt":"2015-07-23T16:56:34","slug":"understanding-nanoparticle-synthesis","status":"publish","type":"page","link":"https:\/\/labs.wsu.edu\/saunderslab\/research\/understanding-nanoparticle-synthesis\/","title":{"rendered":"Understanding Nanoparticle Synthesis and Processing"},"content":{"rendered":"\n<p>Nanoparticles lie at the heart of catalysis:  small metal clusters which enable chemistries to occur at moderate conditions and at industrially-necessary reaction rates.  There are fundamental challenges for industrial catalysis when using nanoparticles:  1) control of the size of nanoparticles during synthesis, 2) recycling and reuse of colloidal nanoparticle catalysts, and 3) depositing and activating supported nanoparticle catalysts.<\/p>\n\n\n\n<p>We have made significant advancements in understanding commonly utilized nanoparticle synthesis techniques,  in using tunable solvents to purify, recover, and reuse dispersed, polymer-stabilized nanoparticle catalysts, and in the preparation of supported nanoparticle catalysts which are highly active and sinter-resistant using Switchable Surfactants.  We have used Pulsed-Field Gradient (PFG)  NMR to measure the self-diffusion coefficients of nanoparticle-ligand complexes to conclusively determine the mechanism of nanoparticle formation using quaternary-ammonium surfactants and demonstrated how to leverage that mechanism to control the size of nanoparticles .   We have developed a technique to control the dispersibility of polymer-stabilized nanoparticle catalysts in order to separate them from a product mixture, recover the nanoparticles, and reuse the nanoparticle catalysts in additional reactions.  This was possible via a high-pressure, tunable, CO2-induced phase separation in a solvent mixture allowing for the control of  the polymer-solvent interactions.  This technique can recover more than 99% of the dispersed nanoparticles and reuse the catalysts as the catalytic activity was maintained throughout the recovery process.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Publications<\/h2>\n\n\n\n<p>Reynolds, S. R., Markland, K., Rood, J., Leonard, E., Saunders, S. R. &#8220;<a href=\"https:\/\/dx.doi.org\/10.1039\/C6RA11475J\">Manipulating Ligand-Nanoparticle Interactions and Catalytic Activity through Organic-Aqueous Tunable Solvents.<\/a>&#8221; RSC Advances, 2016,&nbsp;<strong>6<\/strong>, 78496-78504<em><\/em><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" loading=\"lazy\" width=\"877\" height=\"472\" src=\"https:\/\/s3.wp.wsu.edu\/uploads\/sites\/3194\/2016\/08\/TOC.png\" alt=\"TOC\" class=\"wp-image-804\" srcset=\"https:\/\/wpcdn.web.wsu.edu\/wp-labs\/uploads\/sites\/3194\/2016\/08\/TOC.png 877w, https:\/\/wpcdn.web.wsu.edu\/wp-labs\/uploads\/sites\/3194\/2016\/08\/TOC-396x213.png 396w, https:\/\/wpcdn.web.wsu.edu\/wp-labs\/uploads\/sites\/3194\/2016\/08\/TOC-792x426.png 792w, https:\/\/wpcdn.web.wsu.edu\/wp-labs\/uploads\/sites\/3194\/2016\/08\/TOC-768x413.png 768w, https:\/\/wpcdn.web.wsu.edu\/wp-labs\/uploads\/sites\/3194\/2016\/08\/TOC-198x107.png 198w\" sizes=\"(max-width: 877px) 100vw, 877px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\nGraham, T.R., Renslow, R., Govind, N., Saunders, S.R. &#8220;<a href=\"http:\/\/pubs.acs.org\/doi\/abs\/10.1021\/acs.jpcc.6b06155\">Precursor Ion-Ion Aggregation in the Brust-Schiffrin Synthesis of Alkanethiol Nanoparticles.<\/a>&#8221; Journal of Physical Chemistry &#8211; C. In Press.<br><a href=\"http:\/\/pubs.acs.org\/doi\/abs\/10.1021\/acs.jpcc.6b06155\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-large wp-image-782\" src=\"http:\/\/saunderslab.chebe.wsu.edu\/wp-content\/uploads\/2016\/08\/Table-of-Contents-Picture-1024x551.png\" alt=\"Table of Contents Picture\" width=\"1024\" height=\"551\"><\/a>\n\n\n\n<h2 class=\"wp-block-heading\">Collaborators<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.pnnl.gov\/science\/staff\/staff_info.asp?staff_num=8507\">Ryan Renslow<\/a> &#8211; PNNL<br><a href=\"https:\/\/www.pnnl.gov\/science\/staff\/staff_info.asp?staff_num=8375\">Niri Govind<\/a> &#8211; PNNL<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nanoparticles lie at the heart of catalysis: small metal clusters which enable chemistries to occur at moderate conditions and at industrially-necessary reaction rates. There are fundamental challenges for industrial catalysis when using nanoparticles: 1) control of the size of nanoparticles during synthesis, 2) recycling and reuse of colloidal nanoparticle catalysts, and 3) depositing and activating [&hellip;]<\/p>\n","protected":false},"author":1382,"featured_media":0,"parent":7,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"templates\/single.php","meta":[],"wsuwp_university_location":[],"wsuwp_university_org":[],"_links":{"self":[{"href":"https:\/\/labs.wsu.edu\/saunderslab\/wp-json\/wp\/v2\/pages\/308"}],"collection":[{"href":"https:\/\/labs.wsu.edu\/saunderslab\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/labs.wsu.edu\/saunderslab\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/labs.wsu.edu\/saunderslab\/wp-json\/wp\/v2\/users\/1382"}],"replies":[{"embeddable":true,"href":"https:\/\/labs.wsu.edu\/saunderslab\/wp-json\/wp\/v2\/comments?post=308"}],"version-history":[{"count":0,"href":"https:\/\/labs.wsu.edu\/saunderslab\/wp-json\/wp\/v2\/pages\/308\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/labs.wsu.edu\/saunderslab\/wp-json\/wp\/v2\/pages\/7"}],"wp:attachment":[{"href":"https:\/\/labs.wsu.edu\/saunderslab\/wp-json\/wp\/v2\/media?parent=308"}],"wp:term":[{"taxonomy":"wsuwp_university_location","embeddable":true,"href":"https:\/\/labs.wsu.edu\/saunderslab\/wp-json\/wp\/v2\/wsuwp_university_location?post=308"},{"taxonomy":"wsuwp_university_org","embeddable":true,"href":"https:\/\/labs.wsu.edu\/saunderslab\/wp-json\/wp\/v2\/wsuwp_university_org?post=308"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}