Formation of Ag+–N–TiO2 nanochains and their HPA-composites as highly visible light-sensitive photocatalysts toward two-color solar cells

Lee, Hyungjoo; Lee, Jina; Lee, Yang-Hwa; Lee, Jooran; Yoon, Minjoong

doi:10.1039/c1jm11439e

Cited by 19 publications

(8 citation statements)

References 39 publications

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“…Furthermore, for some particular PS‐PS systems, containing a molecular‐type photosystem, the Z‐scheme electron transfer between PS II and PS I depends on the chemical adsorption of the molecular‐type photosystem on the surface of the solid‐state photosystem. For instance, the Z‐scheme Ag/TiN x O 2‐x ‐H 3 PW 12 O 40 system was constructed by dispersing the Ag/TiN x O 2‐x nanochains in the aqueous solution of H 3 PW 12 O 40 . In the photocatalytic reaction, the photogenerated electrons from the CB of TiN x O 2‐x are transferred to the adsorbed H 3 PW 12 O 40 molecule on the TiN x O 2‐x surface through the formed chemical bond between H 3 PW 12 O 40 molecule and TiN x O 2‐x .…”

Section: Ps‐ps Systemsmentioning

confidence: 99%

All‐Solid‐State Z‐Scheme Photocatalytic Systems

2014

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The current rapid industrial development causes the serious energy and environmental crises. Photocatalyts provide a potential strategy to solve these problems because these materials not only can directly convert solar energy into usable or storable energy resources but also can decompose organic pollutants under solar-light irradiation. However, the aforementioned applications require photocatalysts with a wide absorption range, long-term stability, high charge-separation efficiency and strong redox ability. Unfortunately, it is often difficult for a single-component photocatalyst to simultaneously fulfill all these requirements. The artificial heterogeneous Z-scheme photocatalytic systems, mimicking the natural photosynthesis process, overcome the drawbacks of single-component photocatalysts and satisfy those aforementioned requirements. Such multi-task systems have been extensively investigated in the past decade. Especially, the all-solid-state Z-scheme photocatalytic systems without redox pair have been widely used in the water splitting, solar cells, degradation of pollutants and CO2 conversion, which have a huge potential to solve the current energy and environmental crises facing the modern industrial development. Thus, this review gives a concise overview of the all-solid-state Z-scheme photocatalytic systems, including their composition, construction, optimization and applications.

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Section: Ps‐ps Systemsmentioning

confidence: 99%

All‐Solid‐State Z‐Scheme Photocatalytic Systems

2014

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“…dye adsorption amount, short circuit current density J sc , conversion efficiency η are very much consistent with the obtained IPCE for different devices. Post surface treatments are commonly used to improve the photoanode performance and almost50%increasein η and J sc afterTiCl 4 treatment oftheTiO 2 films have previously been demonstrated,, though current enhancement of 47–67% without any TiCl 4 treatment of the substrate, arising as a consequence of doping only are also revealed.…”

Section: Resultsmentioning

confidence: 99%

“…In another work, Zr/N TiO 2 was prepared by a similar method, which demonstrated even better cell output. Lee et al . prepared Ag/N TiO 2 by hydrothermal process, using a different N‐dopant ammonium titanyl oxalate monohydrate (ATOM), Wang et al .…”

Section: Resultsmentioning

confidence: 99%

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N/Al‐Incorporated TiO₂Nanocompositesfor Improved Device Performance of aDye‐Sensitized Solar Cell

et al. 2017

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We report application of aluminium co-doped with nitrogen titania nanocomposite (Al/N-TiO 2 ) prepared by hydrothermal method as photoanode for very efficient dye-sensitized solar cell (DSSC). The Al/N-TiO 2 nano-composites are characterized by spectral viz. UV-visible, XRD, FTIR, XPS techniques. TEM, SEM, EDX and BET are used to obtain their particle size, morphology and surface area. The DSSC with Al/N co-doped TiO 2 as photoanode and N719 sensitizer dye exhibited an overall light conversion efficiency of 6.24 %, which is much improved compared to that of un-modified TiO 2 (1.69 %) under 100 mW/ cm 2 light irradiation. The improved efficiency with Al/N codoped TiO 2 is attributed to greater dye loading, increased surface area, rapid interfacial charge transfer, slow charge recombination and strong red shift of light absorption in the visible region as compared with un-doped TiO 2 . The effect of the Al concentration on the current density is studied and optimum Al concentration with N-doped TiO 2 is observed to be 1.0 mole%. The work establishes that the as prepared Al/N codoped TiO 2 is impending photoanode material for low-cost and high-efficiency DSSC.

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“…These materials are highly visible-light-sensitive photocatalysts for efficient two-color solar cells. [69] The visible-light absorption of Ag + -N-TiO 2 became broader and stronger upon formation of composites with the HPA owing to charge transfer between the HPA and the TiO 2 nanochains. Shi et al [70] O 40 , were prepared through a sol-gel/solvothermal method.…”

Section: ·-mentioning

confidence: 99%