Narrow-Bandgap LaMO3 (M = Ni, Co) nanomaterials for efficient interfacial solar steam generation

Wani, Tawseef Ahmad; Garg, Parul; Bera, Saheb; Bhattacharya, Sanchari; Dutta, Sanjoy; Kumar, Hemant; Bera, Ashok

doi:10.1016/j.jcis.2021.12.158

Cited by 50 publications

(28 citation statements)

References 81 publications

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“…The evaporation efficiency of the 2D evaporators is limited by various types of energy losses in the form of reflection, convection, and radiation, 51 which can be greatly resolved using 3D evaporators. 52 Furthermore, over 100% evaporation efficiency can be explained by the heat energy harvesting capacity of the 3D evaporation from the environment. The outer surface temperature of the 3D evaporator is about 4 °C lower than the environment (see ESI Fig.…”

Section: Resultsmentioning

confidence: 99%

Multifunctional nanoarchitectured porous carbon for solar steam generation and supercapacitor applications

Kumar

Wani

Pathak

et al. 2022

Sustainable Energy Fuels

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Section: Resultsmentioning

confidence: 99%

Multifunctional nanoarchitectured porous carbon for solar steam generation and supercapacitor applications

Kumar

Wani

Pathak

et al. 2022

Sustainable Energy Fuels

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“…As shown in the Co 2p core‐level spectra (Figure 2a), four typical peaks, 781.6 eV (2p 3/2 ), 786.5 eV (2p 3/2 , satellite), 797.2 eV (2p 1/2 ), and 803.3 eV (2p 1/2 , satellite) present in the Co‐La 50% (w/o H 2 O 2 ), which are assigned to the Co 2+ species [9] . When H 2 O 2 was added (i.e., the Co‐La 50% HTL), the Co 2p core‐level spectra exhibited not only Co 2+ species but also Co 3+ species, which demonstrates the partial oxidation of the Co 2+ species by H 2 O 2 [13a, 17c] . As with the La 3d core‐level spectra (Figure 2b), four typical peaks, 836.0 eV (3d 5/2 ), 839.4 eV (3d 5/2 , satellite), 852.8 eV (3d 3/2 ), and 856.2 eV 3d 3/2 , satellite), ascribed to La 3+ species are observed in the Co‐La 50% (w/o H 2 O 2 ) and there is no significant difference between the spectra of Co‐La 50% (w/o H 2 O 2 ) and Co‐La 50% HTL, revealing that the addition of H 2 O 2 has little effect on the La 3+ precursor [13a, 17c] .…”

Section: Resultsmentioning

confidence: 99%

Co‐La‐Based Hole‐Transporting Layers for Binary Organic Solar Cells with 18.82 % Efficiency

et al. 2022

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Poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a widely used hole transporting layer (HTL) in organic solar cells (OSCs), but its acidity severely reduces the stability of devices. Until now, very few HTLs were developed to replace PEDOT:PSS toward stable and high‐performance OSCs. Herein, a new cobalt‐lanthanum (Co‐La) inorganic system was reported as HTL to show a high conversion efficiency (PCE) of 18.82 %, which is among the top PCEs in binary OSCs. Since electron‐rich outer shell of La atom can interact with Co atom to form charge transfer complex, the work function and conductivity of the Co‐La system could be simultaneously enhanced compared to Co or La‐based HTLs. This Co‐La system could also be applied into other OSCs to show high performance. All these results demonstrate that binary Co‐La systems as HTL can efficiently tackle the issue in hole transporting and show powerful application in OSCs to replace PEDOT:PSS.

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“…Synergistic integration of such PMEGs with SSG can simultaneously produce freshwater and electricity. Using a 3D conical evaporator will increase the evaporation rate by reducing the heat losses under illumination and providing a large effective surface area to maintain a sufficient dark evaporation rate necessary for all-day electricity generation in PMEGs.…”

Section: Resultsmentioning

confidence: 99%

Microfluidic Salinity Gradient-Induced All-Day Electricity Production in Solar Steam Generation

Wani

Kaith

Garg

et al. 2022

ACS Appl. Mater. Interfaces

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Synergistic generation of freshwater and electricity using solar light would be an ideal solution for global freshwater challenges and energy demands. Recently, interface solar steam generation has been considered one of the promising cost-effective alternatives for freshwater generation. Here, we have systematically maintained the salinity gradient within two-legged paper-based microfluidic channels to transport wastewater from the reservoir to the evaporator surface and generate electricity all-day-long. Flowing seawater (3.5 wt % NaCl) on one leg and tap water on the other of the water-conducting channels connected to a conical evaporator, we achieved an average open-circuit voltage (V OC) of 150 mV and a short-circuit current of 6.5 μA across each channel along with a water evaporation efficiency of 88%. As the V OC depends only on the ion concentration gradient within the channel in the direction perpendicular to the water flow, the electricity generation persists throughout the day and can be tuned by varying the salinity. Increasing the salt concentration of the seawater to 20 wt %, the V OC increased to 250 mV in a single channel. In an evaporator connected with four such channels, we achieved a maximum output power density of 9.9 mW m–2 in a series combination without sacrificing the evaporation rate. Furthermore, removing agglomerated salt from the evaporator surface, we harvested salt at a rate of 0.33 kg m–2 h–1. Therefore, our approach provides an alternative way of freshwater generation, salt harvesting, and all-day-long electricity production simultaneously.

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Narrow-Bandgap LaMO3 (M = Ni, Co) nanomaterials for efficient interfacial solar steam generation

Cited by 50 publications

References 81 publications

Multifunctional nanoarchitectured porous carbon for solar steam generation and supercapacitor applications

Multifunctional nanoarchitectured porous carbon for solar steam generation and supercapacitor applications

Co‐La‐Based Hole‐Transporting Layers for Binary Organic Solar Cells with 18.82 % Efficiency

Microfluidic Salinity Gradient-Induced All-Day Electricity Production in Solar Steam Generation

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