CsPbBr<sub>3</sub> Perovskite Nanocrystal Grown on MXene Nanosheets for Enhanced Photoelectric Detection and Photocatalytic CO<sub>2</sub> Reduction

Pan, Aizhao; Ma, Xiaoqin; Huang, Shengying; Wu, Youshen; Jia, Meilin; Shi, Yeming; Liu, Ya; Wangyang, Peihua; He, Ling; Liu, Yi

doi:10.1021/acs.jpclett.9b02605

Cited by 317 publications

(216 citation statements)

References 43 publications

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“…In comparison, halide perovskite nanocrystals have large specific surface area and short carrier diffusion length, which may exhibit large potential in the field of photocatalysis application. [ 9,35–48 ] Encouragingly, in 2017, we for the first time reported a photocatalytic CO 2 reduction reaction by CsPbBr 3 QDs/graphene oxide composite in the non‐aqueous ethyl acetate reaction media. [ 9 ] Subsequently, various lead‐free perovskite nanocrystals including Cs 2 AgBiBr 6 , [ 19 ] Cs 2 PdBr 6 , [ 39 ] and Cs 4 CuSb 2 Cl 12 [ 40 ] with tunable band gap were synthesized to perform photocatalytic CO 2 reduction/photoelectrochemical cell application.…”

Section: Introductionmentioning

confidence: 99%

In Situ Photosynthesis of an MAPbI₃/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution

Cai

Teng

et al. 2020

Adv Funct Materials

119

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Halide perovskite like methylammonium lead iodide perovskite (MAPbI3) with its prominent optoelectronic properties has triggered substantial concerns in photocatalytic H2 evolution. In this work, to attain preferable photocatalytic performance, a MAPbI3/cobalt phosphide (CoP) hybrid heterojunction is constructed by a facile in situ photosynthesis approach. Systematic investigations reveal that the CoP nanoparticle can work as co‐catalyst to not only extract photogenerated electrons effectively from MAPbI3 to improve the photoinduced charge separation, but also facilitate the interfacial catalytic reaction. As a result, the as‐achieved MAPbI3/CoP hybrid displays a superior H2 evolution rate of 785.9 µmol h−1 g−1 in hydroiodic acid solution within 3 h, which is ≈8.0 times higher than that of pristine MAPbI3. Furthermore, the H2 evolution rate of MAPbI3/CoP hybrid can reach 2087.5 µmol h−1 g−1 when the photocatalytic reaction time reaches 27 h. This study employs a facile in situ photosynthesis strategy to deposit the metal phosphide co‐catalyst on halide perovskite nanocrystals to conduct photocatalytic H2 evolution reaction, which may stimulate the intensive investigation of perovskite/co‐catalyst hybrid systems for future photocatalytic applications.

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Section: Introductionmentioning

confidence: 99%

In Situ Photosynthesis of an MAPbI₃/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution

Cai

Teng

et al. 2020

Adv Funct Materials

119

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“…Liu et al. planted CsPbBr 3 NCs on 2 D MXene nanosheets by an in situ growth method . Efficient photodriven charge‐carrier transfer proceeds between CsPbBr 3 NCs and MXene nanosheets.…”

Section: Engineering Mhps For Photocatalysismentioning

confidence: 99%

Recent Progress in Engineering Metal Halide Perovskites for Efficient Visible‐Light‐Driven Photocatalysis

et al. 2020

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Artificial photosynthesis has attracted increasing attention due to recent environmental and energy concerns. Metal halide perovskites (MHPs) demonstrating excellent optoelectronic properties have currently emerged as novel and efficient photocatalytic materials. Herein, the structural features of MHPs that are responsible for the photoinduced charge separation and charge migration properties are briefly introduced, and then important and necessary photophysical and photochemical aspects of MHPs related to photoredox catalysis are summarized. Subsequently, the applications of MHPs for solar energy harvesting and photocatalytic conversion, including H2 evolution, CO2 reduction, degradation of organic pollutants, and photoredox organic synthesis, are extensively demonstrated, with a focus on strategies for improving the performance (e.g., selectivity, activity, stability, recyclability, and environmental compatibility) of these MHP‐based photocatalytic systems. To conclude, existing challenges and prospects on the future development of MHP‐based materials towards photoredox catalysis applications are detailed.

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“…It is reported that MXene nanosheets are abundant with surface terminations such as fluorine, oxygen, and hydroxyl groups, [ 29 ] which is inclined to interact with ligands such as OA and oleylamine. [ 30 ] These ligands will form kinetically favorable nucleation points for capturing PbBr 2 precursors. [ 19f,31 ] Thus the growth mechanism of MAPbBr 3 perovskite nanocrystals on MXene nanosheets could be elucidated as this: once the perovskite precursors (CH 3 NH 3 Br, PbBr 2 , OA, and OTA) were added into the Ti 3 C 2 T x suspension, OA/OTA will first interact with Ti 3 C 2 T x due to its abundant surface groups.…”

Section: Figurementioning

confidence: 99%

“…This phenomenon is commonly observed in previous reported perovskite NCs/2D nanosheets hybrid structures synthesized by solution growth method, where the PL lifetime is usually observed to decrease with more 2D nanosheets loaded in the synthesis. [ 19a,30 ] To make clear weather it is charge transfer or energy transfer in MAPbBr 3 /Ti 3 C 2 T x heterostructures, we first fabricated electron‐ and hole‐only photoelectric conversion devices [ 39 ] with MAPbBr 3 /Ti 3 C 2 T x heterostructures and pristine MXene as the active material. The device structures and corresponding photoresponse are shown in Figure S9 in the Supporting Information.…”

Section: Figurementioning

confidence: 99%

“…For the pristine MXene based devices, no obvious photocurrent change was observed in both electron‐ and hole‐only photoelectric conversion devices when they are under illumination with a 60–60 s on–off switch, which is due to its metallic nature and weak absorption. [ 30 ] When it comes to the devices using perovskite/MXene heterostructures as the active layer, obvious change in the device current is clearly observed in both electron‐ and hole‐only devices. This result indicates that both electrons and holes can be transferred from discrete MAPbBr 3 NCs to conductive Ti 3 C 2 T x .…”

Section: Figurementioning

confidence: 99%

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In Situ Growth of MAPbBr₃ Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer

Zhang

Liu

Liang

et al. 2020

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PVs) [1] and optoelectronic devices. [2] The power conversion efficiencies (PCE) of perovskite solar cells have exceeded 25% [3] in a few years since the first perovskite photovoltaics with a PCE of 3.9% came out in 2009. [4] The remarkable performance is attributed to the superior properties of perovskites such as a high and balanced carrier mobility, [5] long carrier diffusion length, [6] and large light absorption coefficient in the UV-vis range. [7] Meanwhile, metal halide perovskites in the form of colloidal nanocrystals (NCs) have drawn considerable attention in recent years. [8] Perovskite NCs could be easily synthesized at room temperature and ambient conditions with a large yield. [9] Besides, these colloidal perovskite NCs feature a number of advantages such as a high photoluminescence (PL) quantum yield, [10] narrow-band emission, [11] and tunable emission over the whole visible region. [12] Benefiting from these fascinating characteristics, perovskite NCs present promise in applications such as solutionprocessed photodetectors, [13] light-emitting diodes, [14] and solar cells. [15] Perovskite NCs have also been reported to demonstrate potential as photocatalysts due to the proper energy band structure, excellent visible-light responses, and high specific surface area. [16] Nevertheless, due to the presence of large amount of crystal boundaries in NCs film that greatly restricted charge and/or energy transfer, [17] improvement of photogenerated carriers transfer at the NC interface is necessary for applications such as photoelectric conversion and photocatalysis. [16b,18] Recently, heterostructures based on perovskites NCs and 2D materials (black phosphorus, reduced graphene oxide, graphitic carbon nitride, hexagonal boron nitride, and so on) have attracted much attention. [16b,18a,19] Due to the effective protection afforded by 2D nanosheets, the stability of perovskite NCs against air, moisture, and thermal conditions has been significantly enhanced. [19e,f ] Moreover, 2D nanosheets act not only as flexible substrates that connect dispersed perovskite nanocrystals but also enable the effective charge and/or energy transfer transport through the heterostructure interfaces. For example, Xu and co-workers reported the decoration of CsPbBr 3 NCs on porous g-C 3 N 4 nanosheets to construct the composite photocatalysts via N-Br chemical bonding. [19c] The unique N-Br bonding state leads to enhanced charge separation between the two materials. As expected, the resultant composite photocatalyst The performance of perovskite nanocrystals (NCs) in optoelectronics and photocatalysis is severely limited by the presence of large amounts of crystal boundaries in NCs film that greatly restricts energy transfer. Creating heterostructures based on perovskite NCs and 2D materials is a common approach to improve the energy transport at the perovskite/2D materials interface. Herein, methylamine lead bromide (MAPbBr 3 , MA: CH 3 NH 3 + ) perovskite NCs are homogeneously deposited on highly conductive few-layer MX...

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CsPbBr₃ Perovskite Nanocrystal Grown on MXene Nanosheets for Enhanced Photoelectric Detection and Photocatalytic CO₂ Reduction

Cited by 317 publications

References 43 publications

In Situ Photosynthesis of an MAPbI₃/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution

In Situ Photosynthesis of an MAPbI₃/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution

Recent Progress in Engineering Metal Halide Perovskites for Efficient Visible‐Light‐Driven Photocatalysis

In Situ Growth of MAPbBr₃ Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer

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CsPbBr3 Perovskite Nanocrystal Grown on MXene Nanosheets for Enhanced Photoelectric Detection and Photocatalytic CO2 Reduction

Cited by 317 publications

References 43 publications

In Situ Photosynthesis of an MAPbI3/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution

In Situ Photosynthesis of an MAPbI3/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution

Recent Progress in Engineering Metal Halide Perovskites for Efficient Visible‐Light‐Driven Photocatalysis

In Situ Growth of MAPbBr3 Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer

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CsPbBr₃ Perovskite Nanocrystal Grown on MXene Nanosheets for Enhanced Photoelectric Detection and Photocatalytic CO₂ Reduction

In Situ Photosynthesis of an MAPbI₃/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution

In Situ Photosynthesis of an MAPbI₃/CoP Hybrid Heterojunction for Efficient Photocatalytic Hydrogen Evolution

In Situ Growth of MAPbBr₃ Nanocrystals on Few‐Layer MXene Nanosheets with Efficient Energy Transfer