Accelerated transfer and separation of charge carriers during the photocatalytic production of hydrogen over Au/ZrO2–TiO2 structures by interfacial energy states

Ramírez-Ortega, David; Guerrero-Araque, Diana; Sierra-Uribe, Jhon Harrison; Camposeco, R.; Gómez, R.; Zanella, Rodolfo

doi:10.1016/j.ijhydene.2023.01.134

Cited by 10 publications

(3 citation statements)

References 50 publications

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“…The spacings of 0.249 and 0.204 nm correspond to the (102) crystal plane of MoS 2 nanosheets and the (200) crystal plane of Au NPs, respectively, validating their distinct crystal phases. The formation of heterojunctions facilitates the generation and separation of photogenerated carriers, significantly enhancing the photoelectrochemical performance . The uniform distribution of each element in MoS 2 –Au nanocomposites was verified by EDS mapping (Figure S4).…”

Section: Resultsmentioning

confidence: 94%

A Photoelectrochemical Sensor for Real-Time Monitoring of Neurochemical Signals in the Brain of Awake Animals

Wang,

Lu,

Cai

et al. 2024

Anal. Chem.

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Metal ion homeostasis is imperative for normal functioning of the brain. Considering the close association between brain metal ions and various pathological processes in brain diseases, it becomes essential to track their dynamics in awake animals for accurate physiological insights. Although ion-selective microelectrodes (ISMEs) have demonstrated great advantage in recording ion signals in awake animals, their intrinsic potential drift impairs their accuracy in long-term in vivo analysis. This study addresses the challenge by integrating ISMEs with photoelectrochemical (PEC) sensing, presenting an excitation-detection separated PEC platform based on potential regulation of ISMEs. A flexible indium tin oxide (Flex-ITO) electrode, modified with MoS 2 nanosheets and Au NPs, serves as the photoelectrode and is integrated with a micro-LED. The integrated photoelectrode is placed on the rat skull to remain unaffected by animal activity. The potential of ISME dependent on the concentration of target K + serves as the modulator of the photocurrent signal of the photoelectrode. The proposed design allows deep brain detection while minimizing interference with neurons, thus enabling real-time monitoring of neurochemical signals in awake animals. It successfully monitors changes in extracellular K + levels in the rat brain after exposure to PM2.5, presenting a valuable analytical tool for understanding the impact of environmental factors on the nervous system.

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Section: Resultsmentioning

confidence: 94%

A Photoelectrochemical Sensor for Real-Time Monitoring of Neurochemical Signals in the Brain of Awake Animals

Wang,

Lu,

Cai

et al. 2024

Anal. Chem.

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“…Promoting the charge carriers separation via trapping the photogenerated electrons by loaded metals, enhancing electron transportation, increasing the substrate adsorption, creating more surface active sites, and preventing the occurrence of any side reaction are the main reasons for improving the photocatalytic performance by developing the co-catalyst structures [60,115]. For the case of water splitting, Ortega et al [116] elucidated the impact of loading Au nanoparticles as a co-catalyst with surface plasmon resonance (SPR) ability on ZrO 2 -TiO 2 in the photocatalytic H 2 production. The presence of Au nanoparticles with optimum content of 5 wt.%, increased H 2 production four times greater than that of ZrO 2 -TiO 2 as shown in Figure 10a.…”

Section: Co-catalysts Decorationmentioning

confidence: 99%

“…(a) H 2 production in the presence of various photocatalysts ((i) ZrO 2 -TiO 2 , (ii) 1 wt.% Au/ZrO 2 -TiO 2 , (iii) 3 wt.% Au/ZrO 2 -TiO 2 , (iv) 5 wt.% Au/ZrO 2 -TiO 2 , and (v) 7 wt.% Au/ZrO 2 -TiO 2 ). Reproduced with permission from ref [116]…”

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confidence: 99%

Recent Progress on Semiconductor Heterogeneous Photocatalysts in Clean Energy Production and Environmental Remediation

Goodarzi,

Ashrafi-Peyman,

Khani

et al. 2023

Catalysts

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Semiconductor-based photocatalytic reactions are a practical class of advanced oxidation processes (AOPs) to address energy scarcity and environmental pollution. By utilizing solar energy as a clean, abundant, and renewable source, this process offers numerous advantages, including high efficiency, eco-friendliness, and low cost. In this review, we present several methods to construct various photocatalyst systems with excellent visible light absorption and efficient charge carrier separation ability through the optimization of materials design and reaction conditions. Then it introduces the fundamentals of photocatalysis in both clean energy generation and environmental remediation. In the other parts, we introduce various approaches to enhance photocatalytic activity by applying different strategies, including semiconductor structure modification (e.g., morphology regulation, co-catalysts decoration, doping, defect engineering, surface sensitization, heterojunction construction) and tuning and optimizing reaction conditions (such as photocatalyst concentration, initial contaminant concentration, pH, reaction temperature, light intensity, charge-carrier scavengers). Then, a comparative study on the photocatalytic performance of the various recently examined photocatalysts applied in both clean energy production and environmental remediation will be discussed. To realize these goals, different photocatalytic reactions including H2 production via water splitting, CO2 reduction to value-added products, dye, and drug photodegradation to lessen toxic chemicals, will be presented. Subsequently, we report dual-functional photocatalysis systems for simultaneous energy production and pollutant photodegradation for efficient reactions. Then, a brief discussion about the industrial and economical applications of photocatalysts is described. The report follows by introducing the application of artificial intelligence and machine learning in the design and selection of an innovative photocatalyst in energy and environmental issues. Finally, a summary and future research directions toward developing photocatalytic systems with significantly improved efficiency and stability will be provided.

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MXene dots as photocatalysts for CO2 hydrogenation

Ramírez-Grau,

Cabrero-Antonino,

García

et al. 2024

Applied Catalysis B: Environmental

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Accelerated transfer and separation of charge carriers during the photocatalytic production of hydrogen over Au/ZrO2–TiO2 structures by interfacial energy states

Cited by 10 publications

References 50 publications

A Photoelectrochemical Sensor for Real-Time Monitoring of Neurochemical Signals in the Brain of Awake Animals

A Photoelectrochemical Sensor for Real-Time Monitoring of Neurochemical Signals in the Brain of Awake Animals

Recent Progress on Semiconductor Heterogeneous Photocatalysts in Clean Energy Production and Environmental Remediation

MXene dots as photocatalysts for CO2 hydrogenation

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