J.G. Villachica-Llamosas

Centro de Investigación y Desarrollo

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G. Colón

Instituto de Ciencia de Materiales de Sevilla

A. Ruiz-Aguirre

Centro de Investigación y Desarrollo

José Peral

Universitat Autònoma de Barcelona

S. Malato

Centro de Investigación y Desarrollo

C. Villachica-Leon

Consulintel (Spain)

J. C. Rojas-Montes

Durango Institute of Technology

P. Camero-Hermoza

National University of Saint Anthony the Abbot in Cuzco

Alejandro Cabrera‐Reina

Metropolitan University of Technology

Maria Inmaculada Polo‐López

University of Almería

Marcos González-Tejero

Universidad de Sevilla

Cooperative Institutions

University of Almería

Universidad de Sevilla

Centro de Investigación y Desarrollo

Universitat Autònoma de Barcelona

Universitat Politècnica de Catalunya

Instituto de Ciencia de Materiales de Sevilla

Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas

Consulintel (Spain)

Durango Institute of Technology

Tecnológico Nacional de México

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Assessment of pilot-plant scale solar photocatalytic hydrogen generation with multiple approaches: Valorization, water decontamination and disinfection

Energy (2022)

A. Ruiz-Aguirre J.G. Villachica-Llamosas Maria Inmaculada Polo‐López Alejandro Cabrera‐Reina G. Colón

The main goal of the present study was to explore pilot-scale combination of H2 generation with simultaneous water disinfection or decontamination. Performance of a TiO2–CuO mixture for solar-to-hydrogen (STH) conversion was studied, focusing on treatment optimization (catalyst dose, proportion of semiconductors in the mixture and concentration of the sacrificial agent). Experiments were performed in a 25-L compound parabolic collector (2 m2) solar pilot plant specifically designed for photocatalytic hydrogen generation. The best operating conditions were 100 mg L−1 TiO2–CuO (10:1) with 0.075 M glycerol as the sacrificial agent. The best STH conversion attained was 0.9%. 25 mg L−1 imidacloprid was completely degraded (over 99%). The synergetic effect of anoxic conditions, TiO2:CuO and solar radiation caused a significant reduction (>5 Log) in concentration of E. coli, used as a model waterborne pathogen, in less than 10 min.

Human decontamination

10.1016/j.energy.2022.125199

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Citations (23)

Pyrite Flotation Separation and Encapsulation: A Synchronized Remediation System for Tailings Dams

Mine Water and the Environment (2021)

P. Camero-Hermoza Dandy Calla Choque J. C. Rojas-Montes C. Villachica-Leon J.G. Villachica-Llamosas

Acid Mine Drainage

10.1007/s10230-021-00753-7

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Citations (1)

High-Performance Photocatalytic H₂ Production Using a Binary Cu/TiO₂/SrTiO₃ Heterojunction

ACS Applied Energy Materials (2023)

Marcos González-Tejero J.G. Villachica-Llamosas A. Ruiz-Aguirre G. Colón

Cu/TiO2/SrTiO3 hybrid structures have been synthesized by the simple impregnation method from Cu/TiO2 and SrTiO3 systems. The structural and surface characterization stated that Cu/TiO2/SrTiO3 composites form an effective covering of SrTiO3 by Cu/TiO2. The heterostructured catalysts lead to an outstanding improved photoactivity for hydrogen production from methanol photoreforming that would be related with the efficient separation of charge pairs favored by the Cu/TiO2/SrTiO3 heterojunction. The best photoproduction is attained for the 30 wt % SrTiO3 heterojunction showing 81.7 mmol/g H2 after 6 h (leading to an apparent quantum yield of ca 1%), 1.7 times higher than that of bare Cu/TiO2.

Quantum yield

10.1021/acsaem.3c00219

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Citations (14)

CuO–TiO2 pilot-plant system performance for solar photocatalytic hydrogen production

International Journal of Hydrogen Energy (2023)

J.G. Villachica-Llamosas A. Ruiz-Aguirre G. Colón José Peral S. Malato

The main goal of the present study was to explore photocatalytic performance of the TiO2–CuO mixture, for solar to hydrogen conversion at pilot plant scale under two different irradiation conditions (sunny and partly cloudy), focusing on high-temperature pretreatment of the catalyst mixture to try to improve TiO2 doping with copper. P25–TiO2 and commercial CuO were used with different amounts of Cu (2 wt% or 7 wt% Cu) calcined at 200–400 °C during several hours. Catalysts were tested at pilot plant scale using solar compound parabolic collectors, with glycerol as the sacrificial agent. The photocatalyst prepared after heating at 200 °C for 3 h and with 7 wt% Cu, resulted in higher hydrogen production than under the other heating conditions, and results were slightly better (5–10%) than the reference values with the untreated catalysts. Photocatalytic efficiency was slightly lower at the higher calcination temperature (400 °C). CO2 production and formation of formate and glycolate clearly demonstrated glycerol photoreforming. The Cu from the calcined catalyst remaining on the solid was significantly less (2.5%) than on the non-calcined catalyst (4.2%), with an important fraction of lixiviated copper and copper deposition on the reactor walls. This is a critical drawback that must be considered for large-scale applications.

Solar furnace

10.1016/j.ijhydene.2023.07.149

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Citations (6)