Cubic structured SrTiO3 with Ce/Cr Co-doping for photoinduced catalytic oxidation of gaseous mercury

Cai, Jun; Ren, Yuanhang; Xia, Yi; Tao, Lei; Wang, Xueqian; Wang, Langlang; Ning, Ping; Ma, Yangmin

doi:10.1016/j.chemosphere.2022.133828

Cited by 19 publications

(3 citation statements)

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“…The photogenerated electron–hole complex rate is also one of the main factors affecting photocatalytic performance . From the PL spectra in Figure c, it can be seen that De-Cu 30 /TiO 2 has a lower photogenerated electron–hole complexation rate compared to TiO 2 and Cu 30 /TiO 2 , in consistence with the results of the photocatalytic removal performance of Hg 0 . , Meanwhile, the energy level and band gap both have important influence on photocatalytic performance, and the optical capture capability of the samples was investigated using UV–Vis–DRS. , From Figure d,e, De-Cu 30 /TiO 2 displays good absorption ability in both the UV and visible regions.…”

Section: Resultsmentioning

confidence: 74%

Two Birds with One Stone: Copper-Based Adsorbents Used for Photocatalytic Oxidation of Hg⁰ (Gas) after Removal of PH₃

Feng¹,

Wang

et al. 2023

Environ. Sci. Technol.

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Cu X /TiO 2 adsorbents with CuO as the active component were prepared via a simple impregnation method for efficient purification of phosphine (PH 3 ) under the conditions of low temperatures (90 °C) and low oxygen concentration (1%). The PH 3 breakthrough capacity of optimal adsorbent (Cu 30 /TiO 2 ) is 136.2 mg(PH 3 )•g sorbent −1, and the excellent dephosphorization performance is mainly attributed to its abundant sur face-active oxygen and alkaline sites, large specific surface area, and strong interaction between CuO and the support TiO 2 . Surprisingly, CuO is converted to Cu 3 P after the dephosphorization by Cu X /TiO 2 . Since Cu 3 P is a P-type semiconductor with high added value, the deactivated adsorbent (Cu 3 P/TiO 2 ) is an efficient heterostructure photocatalyst for photocatalytic removal of Hg 0 (gas) with the Hg 0 removal performance of 92.64% under visible light. This study provides a feasible strategy for the efficient removal and resource conversion of PH 3 under low-temperature conditions and the alleviation of the environmental risk of secondary pollution.

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Section: Resultsmentioning

confidence: 74%

Two Birds with One Stone: Copper-Based Adsorbents Used for Photocatalytic Oxidation of Hg⁰ (Gas) after Removal of PH₃

Feng¹,

Wang

et al. 2023

Environ. Sci. Technol.

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“…Different from SrTiO 3 that only has the cubic phase, BaTiO 3 has multiple crystallographic phases, and the role of those phases on photoresponse has not been investigated before. , With the help of SPS, we aimed to shed light on this point and revealed how Rh affects phase formation. The XRD and photocurrent tests suggested that the quantity of the hexagonal phase was associated with the photoactivity (Figures c and ).…”

Section: Resultsmentioning

confidence: 99%

Rhodium-Doped Barium Titanate Perovskite as a Stable p-Type Photocathode in Solar Water Splitting

Shi,

Zhang,

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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Solar water splitting from a p−n-conjugated photoelectrochemical (PEC) system is a promising way to produce hydrogen sustainably. At present, finding a compatible p-type photocathode material for the p−n system remains a great challenge in consideration of the photocurrent and stability. This paper highlighted a promising candidate, Rh/BaTiO 3 , by switching BaTiO 3 from an n-type photoanode to a p-type photocathode upon Rh doping. The dopant activated visible light absorption up to 550 nm and an onset potential as high as 1.0 V (vs RHE). Using surface photovoltage spectroscopy as a powerful characterization tool, the n-to p-type transition of the semiconductor was studied and explained microscopically by which we quantitatively isolated the cathodic contribution caused by the Rh dopant. Unbiased overall solar water splitting was accomplished by serially connecting the Pt/Rh/BaTiO 3 photocathode to a CoO x /Mo/BiVO 4 photoanode, which produced a solar to hydrogen conversion efficiency of 0.1% and an excellent stability over 100 h of operation at ambient pressure. This work revealed the key role that the Rh dopant played in the n-to p-type adjustment of titanate semiconductors and demonstrated its great potential for application in PEC water splitting.

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“…[163] To date, co-doped perovskite oxides have been prepared for enhancing photocatalytic activity. Cai et al [164] prepared cubic structured SrTiO 3 with Ce/Cr co-doping by solvothermal method. They discovered that the co-doped samples had the lowest electron-hole pair recombination rate, the largest specific surface area, the minimum bandgap, and afforded excellent photocatalytic activity.…”

Section: Metal Cation Doping At the A Or B Sitesmentioning

confidence: 99%

Research Progress on Photocatalytic CO₂ Reduction Based on Perovskite Oxides

Wang

Yuan

et al. 2023

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Photocatalytic CO2 reduction to valuable fuels is a promising way to alleviate anthropogenic CO2 emissions and energy crises. Perovskite oxides have attracted widespread attention as photocatalysts for CO2 reduction by virtue of their high catalytic activity, compositional flexibility, bandgap adjustability, and good stability. In this review, the basic theory of photocatalysis and the mechanism of CO2 reduction over perovskite oxide are first introduced. Then, perovskite oxides' structures, properties, and preparations are presented. In detail, the research progress on perovskite oxides for photocatalytic CO2 reduction is discussed from five aspects: as a photocatalyst in its own right, metal cation doping at A and B sites of perovskite oxides, anion doping at O sites of perovskite oxides and oxygen vacancies, loading cocatalyst on perovskite oxides, and constructing heterojunction with other semiconductors. Finally, the development prospects of perovskite oxides for photocatalytic CO2 reduction are put forward. This article should serve as a useful guide for creating perovskite oxide‐based photocatalysts that are more effective and reasonable.

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Cubic structured SrTiO3 with Ce/Cr Co-doping for photoinduced catalytic oxidation of gaseous mercury

Cited by 19 publications

References 50 publications

Two Birds with One Stone: Copper-Based Adsorbents Used for Photocatalytic Oxidation of Hg⁰ (Gas) after Removal of PH₃

Two Birds with One Stone: Copper-Based Adsorbents Used for Photocatalytic Oxidation of Hg⁰ (Gas) after Removal of PH₃

Rhodium-Doped Barium Titanate Perovskite as a Stable p-Type Photocathode in Solar Water Splitting

Research Progress on Photocatalytic CO₂ Reduction Based on Perovskite Oxides

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Cubic structured SrTiO3 with Ce/Cr Co-doping for photoinduced catalytic oxidation of gaseous mercury

Cited by 19 publications

References 50 publications

Two Birds with One Stone: Copper-Based Adsorbents Used for Photocatalytic Oxidation of Hg0 (Gas) after Removal of PH3

Two Birds with One Stone: Copper-Based Adsorbents Used for Photocatalytic Oxidation of Hg0 (Gas) after Removal of PH3

Rhodium-Doped Barium Titanate Perovskite as a Stable p-Type Photocathode in Solar Water Splitting

Research Progress on Photocatalytic CO2 Reduction Based on Perovskite Oxides

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Two Birds with One Stone: Copper-Based Adsorbents Used for Photocatalytic Oxidation of Hg⁰ (Gas) after Removal of PH₃

Two Birds with One Stone: Copper-Based Adsorbents Used for Photocatalytic Oxidation of Hg⁰ (Gas) after Removal of PH₃

Research Progress on Photocatalytic CO₂ Reduction Based on Perovskite Oxides