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Author (up) Azeem, M.; Guérin, A.; Dumais, T.; Caminos, L.; Goldstein, R.E.; Pesci, A.I.; de Dios Rivera, J.; Torres, M.J.; Wiener, J.; Campos, J.L.; Dumais, J.
Title Optimal Design of Multilayer Fog Collectors Type
Year 2020 Publication ACS Applied Materials & Interfaces Abbreviated Journal ACS Appl. Mater. Interfaces
Volume 12 Issue 6 Pages 7736-7743
Keywords
Abstract The growing concerns over desertification have spurred research into technologies aimed at acquiring water from nontraditional sources such as dew, fog, and water vapor. Some of the most promising developments have focused on improving designs to collect water from fog. However, the absence of a shared framework to predict, measure, and compare the water collection efficiencies of new prototypes is becoming a major obstacle to progress in the field. We address this problem by providing a general theory to design efficient fog collectors as well as a concrete experimental protocol to furnish our theory with all the necessary parameters to quantify the effective water collection efficiency. We show in particular that multilayer collectors are required for high fog collection efficiency and that all efficient designs are found within a narrow range of mesh porosity. We support our conclusions with measurements on simple multilayer harp collectors.
Address
Corporate Author Thesis
Publisher American Chemical Society Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1944-8244 ISBN Medium
Area Expedition Conference
Notes doi: 10.1021/acsami.9b19727 Approved
Call Number UAI @ eduardo.moreno @ Serial 1108
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Author (up) Larrain, F.A.; Fuentes-Hernandez, C.; Chang, Y.CH.; Rodriguez-Toro, V.A.; Abraham, S.; Kippelen, B.
Title Increasing Volume in Conjugated Polymers to Facilitate Electrical Doping with Phosphomolybdic Acid Type
Year 2021 Publication ACS Applied Materials & Interfaces Abbreviated Journal ACS Appl. Mater. Interfaces
Volume 13 Issue 19 Pages 23260-23267
Keywords ORGANIC SEMICONDUCTORS; SOLAR-CELLS; CATALYSIS; TRANSPORT; PROGRESS; FILMS; RAMAN
Abstract Molecular p-type electrical dopants have been proven useful to fine-tune the optoelectronic properties of bulk organic semiconductors and their interfaces. Here, the volume in polymer films and its role in solution-based electrical p-type doping using phosphomolybdic acid (PMA) are studied. The polymer film volume was controlled using two approaches. One is based on heating both the PMA solution and the film prior to immersion. The second is based on coating the polymer film with a liquid blend that contains the PMA solution and a swelling solvent. 31P NMR and FTIR experiments indicate that the Keggin structure appears to be preserved throughout the doping process. Results show that increasing the polymer volume facilitates the infiltration of the PMA Keggin structure, which results in an increased electrical p-type doping level.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1944-8244 ISBN Medium
Area Expedition Conference
Notes WOS:000655027500116 Approved
Call Number UAI @ alexi.delcanto @ Serial 1382
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Author (up) Reus, L.; Belbeze, M.; Feddersen, H.; Rubio, E.
Title Extraction Planning Under Capacity Uncertainty at the Chuquicamata Underground Mine Type
Year 2018 Publication Interfaces Abbreviated Journal Interfaces
Volume 48 Issue 6 Pages 543-555
Keywords underground mine extraction scheduling; operational uncertainty management; stochastic programming applications; long-term mine planning
Abstract We propose an extraction schedule for the Chuquicamata underground copper mine in Chile. The schedule maximizes profits while adhering to all operational and geomechanical requirements involved in proper removal of the material. We include extraction capacity uncertainties due to failure in equipment, specifically to the overland conveyor, which we find to be the most critical component in the extraction process. First we present the extraction plan based on a deterministic model, which does not assume uncertainty in the extraction capacity and represents the solution that the mine can implement without using the results of this study. Then we extend this model to a stochastic setting by generating different scenarios for capacity values in subsequent periods. We construct a multistage model that handles economic downside risk arising from this uncertainty by penalizing plans that deviate from an ex ante profit target in one or more scenarios. Simulation results show that a stochastic-based solution can achieve the same expected profits as the deterministic-based solution. However, the earnings of the stochastic-based solution average 5% more for scenarios in which earnings are below the 10th percentile. If we choose a target 2% below the expected profit obtained by the deterministic-based solution, this average increases from 5% to 9%.
Address [Reus, Lorenzo; Belbeze, Mathias; Feddersen, Hans] Adolfo Ibanez Univ, Dept Engn & Sci, Santiago 7910000, Chile, Email: lorenzo.reus@uai.cl;
Corporate Author Thesis
Publisher Informs Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0092-2102 ISBN Medium
Area Expedition Conference
Notes WOS:000454513500005 Approved
Call Number UAI @ eduardo.moreno @ Serial 967
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Author (up) Shanmugaraj, K.; Mangalaraja, R.V.; Campos, C.H.; Udayabhaskar, R.; Singh, D.P.; Vivas, L.; Thirumurugan, A.; Al-Sehemi, A.G.; de Leon, J.N.D.; Ali, W.
Title Cu-Ni bimetallic nanoparticles anchored on halloysite nanotubes for the environmental remediation Type
Year 2023 Publication Surfaces and Interfaces Abbreviated Journal Surf. Interfaces
Volume 41 Issue Pages 103257
Keywords Halloysite nanotubes; Bimetallic nanoparticles; 4-Nitroaniline; Rhodamine B; Synergetic effect
Abstract Hereby, we report the synthesis of CuNi bimetallic nanoparticles (NPs)-decorated halloysite nanotubes (CuNi/ HNTs) for the catalytic reduction of 4-nitroaniline (4-NA) and rhodamine B (RhB) dye in an aqueous medium at room temperature. In this work, CuNi/HNTs composites with different wt% of CuNi NPs were synthesized and characterized by various techniques such as SEM, EDS, XRD, TEM and XPS. The TEM characterization confirmed that the CuNi bimetallic NPs (similar to 11 nm) were successfully anchored onto the outer surface of HNTs. Among the prepared catalysts, Cu0.75Ni0.25/HNTs catalyst displayed highest catalytic activity in the reduction of 4-NA to its corresponding amino derivative in the presence of NaBH4 with a maximum conversion efficiency of >99% and an apparent rate constant k(app) of 0.152 s(- 1) within 30 s of reaction time. Notably, even after 15 cycles of catalytic reduction of 4-NA and RhB, there was no apparent deactivation of the catalytic activity of the Cu0.75Ni0.25/HNTs catalyst, demonstrating the excellent catalytic reusability and stability. The presence of CuNi NPs with low Ni content enhanced the catalytic activity due to the synergetic effect. Moreover, the continuous flow fixed bed reactor designed with Cu0.75Ni0.25/HNTs catalyst exhibited the potential application for the reduction of 4-NA and RhB dye under mild reaction conditions. Furthermore, the present catalytic system could be applicable for the treatment of various wastewater effluents.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2468-0230 ISBN Medium
Area Expedition Conference
Notes WOS:001056722900001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1883
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