Two-photon induced NIR active core-shell structured WO3/CdS for enhanced solar light photocatalytic performance

Lu, Yue; Yang, Li; Wang, Yuyan; Zhang, Junying

doi:10.1016/j.apcatb.2020.118979

Cited by 71 publications

(56 citation statements)

References 44 publications

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“…The XPS signals of W 5 + ions are attributed to the lower coordination number of W atoms nearby O atoms, confirming the existence of O vacancies in the sample. [31,36] Furthermore, we observed a strong electron paramagnetic resonance (EPR) signal at g = 2.002 (Figure 1E) due to the unpaired electrons from the W 5 + ions, which is another characteristic evidence of O vacancies in oxide semiconductors. [33] For comparison, we also synthesized O-rich WO 3 NSs by annealing the WO 3 • H 2 O NSs under an air atmosphere (O 2 condition).…”

Section: Chemsuschemmentioning

confidence: 90%

In‐Situ Generated CsPbBr₃ Nanocrystals on O‐Defective WO₃ for Photocatalytic CO₂ Reduction

et al. 2022

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Metal halide perovskite (MHP) nanocrystals (NCs) have shown promising application in photocatalytic CO2 reduction, but their activities are still largely restrained by severe charge recombination and narrow solar spectrum response. Assembly of heterojunctions can be beneficial to the charge separation in MHPs while the assembly process usually brings native interfacial defects, impeding efficient charge separation between two materials. Herein, an in‐situ generation strategy was developed to prepare CsPbBr3/WO3 heterojunction, using WO3 nanosheets (NSs) as growing substrate for the growth of CsPbBr3 NCs. The developed CsPbBr3/WO3 heterojunction exhibited a high‐quality interface, greatly facilitating charge transfer between two semiconductors. The hybrid photocatalyst displayed an excellent activity toward CO2 reduction, which was about 7‐fold higher than pristine CsPbBr3 NCs and 3.5‐fold higher than their assembled counterparts. The experimental results and theoretical simulations revealed that a Z‐scheme mechanism with a favorable internal electric field was responsible for the good performance of CsPbBr3/WO3 heterojunction. By using O‐defective WO3 NSs as a near‐infrared (NIR) light absorber, the CsPbBr3/WO3 heterojunction could harvest NIR light and showed an impressive activity toward CO2 reduction. This work demonstrates a new strategy to design MHP‐based heterojunctions by synergistically considering the interface quality, charge transfer mode, interfacial electric field, and light response range between two semiconductors.

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Section: Chemsuschemmentioning

confidence: 90%

In‐Situ Generated CsPbBr₃ Nanocrystals on O‐Defective WO₃ for Photocatalytic CO₂ Reduction

et al. 2022

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“…Herein, we report a concept for a microfluidic ratiometric magnetic-photoelectrochemical (M-PEC) biosensor. In recent years, the influence of the external field on photoactive materials has been widely concerned, , including temperature gradient, − magnetic field, , external electric field, , microwave, mechanical stress, , and coupled external field . The magnetic field, as a typical noncontact external field, can improve the performance of photoactive materials without introducing a complex preparation process and changing the geometry or components of photoactive materials.…”

Section: Introductionmentioning

confidence: 99%

Microfluidic Ratiometric Photoelectrochemical Biosensor Using a Magnetic Field on a Photochromic Composite Platform: A Proof-of-Concept Study for Magnetic-Photoelectrochemical Bioanalysis

Cheng

Feng

et al. 2021

Anal. Chem.

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Integrating a microfluidic sensor with a ratiometric photoelectrochemical (PEC) strategy to build a bioanalysis device for actual sample testing is often limited to large-volume space-resolution equipment and wavelength-dependent or potentialdependent paired photoactive materials. This work reports a microfluidic ratiometric magnetic-photoelectrochemical (M-PEC) biosensor on the photochromic composite platform to solve the above problems. In particular, as a proof-of-concept study, the platform Bi 2 WO 6−x /amorphous BiOCl nanosheets/Bi 2 S 3 (p-BWO-s) mediated by photochromic color centers and the magnetic photoactive secondary antibody marker ZnFe 2 O 4 @Ag 2 O are integrated on the microfluidic biosensor. By enhancement of the photochromic color centers, p-BWO-s outputs a considerable photocurrent signal. Meanwhile, the photoactivity of the secondary antibody marker can be changed with a magnetic field; thus, different photocurrent signals can be obtained to realize ratiometric detection. The quenching photocurrent signal without the magnetic field and the difference photocurrent signal under the magnetic field are quantitatively related to the target concentration, which unfolds a novel general strategy for bioanalysis. Different from traditional ratiometric PEC biosensors, this work characterizes the first ratiometric PEC biosensor based on an external magnetic field. Generally speaking, combined with different biorecognition cases, this scheme with good expansibility brings a unique new perspective.

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“…Shen et al [ 39 ] constructed a WO 3 -doped gold nanoparticle gas sensor that can detect ppb-level NO 2 . Lu et al [ 40 ] prepared a core-shell WO 3 /CdS heterojunction, which also had excellent photocatalytic performance in the near-infrared region. Gold nanoparticles (Au NPs) have good electrical conductivity and the ability to fix identification elements.…”

Section: Introductionmentioning

confidence: 99%

A Novel Photoelectrochemical Aptamer Sensor Based on CdTe Quantum Dots Enhancement and Exonuclease I-Assisted Signal Amplification for Listeria monocytogenes Detection

Zhu

Hao

Ding

et al. 2021

Foods

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To achieve the rapid detection of Listeria monocytogenes, this study used aptamers for the original identification and built a photoelectrochemical aptamer sensor using exonuclease-assisted amplification. Tungsten trioxide (WO3) was used as a photosensitive material, was modified with gold nanoparticles to immobilize complementary DNA, and amplified the signal by means of the sensitization effect of CdTe quantum dots and the shearing effect of Exonuclease I (Exo I) to achieve high-sensitivity detection. This strategy had a detection limit of 45 CFU/mL in the concentration range of 1.3 × 101–1.3 × 107 CFU/mL. The construction strategy provides a new way to detect Listeria monocytogenes.

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Two-photon induced NIR active core-shell structured WO3/CdS for enhanced solar light photocatalytic performance

Cited by 71 publications

References 44 publications

In‐Situ Generated CsPbBr₃ Nanocrystals on O‐Defective WO₃ for Photocatalytic CO₂ Reduction

In‐Situ Generated CsPbBr₃ Nanocrystals on O‐Defective WO₃ for Photocatalytic CO₂ Reduction

Microfluidic Ratiometric Photoelectrochemical Biosensor Using a Magnetic Field on a Photochromic Composite Platform: A Proof-of-Concept Study for Magnetic-Photoelectrochemical Bioanalysis

A Novel Photoelectrochemical Aptamer Sensor Based on CdTe Quantum Dots Enhancement and Exonuclease I-Assisted Signal Amplification for Listeria monocytogenes Detection

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Two-photon induced NIR active core-shell structured WO3/CdS for enhanced solar light photocatalytic performance

Cited by 71 publications

References 44 publications

In‐Situ Generated CsPbBr3 Nanocrystals on O‐Defective WO3 for Photocatalytic CO2 Reduction

In‐Situ Generated CsPbBr3 Nanocrystals on O‐Defective WO3 for Photocatalytic CO2 Reduction

Microfluidic Ratiometric Photoelectrochemical Biosensor Using a Magnetic Field on a Photochromic Composite Platform: A Proof-of-Concept Study for Magnetic-Photoelectrochemical Bioanalysis

A Novel Photoelectrochemical Aptamer Sensor Based on CdTe Quantum Dots Enhancement and Exonuclease I-Assisted Signal Amplification for Listeria monocytogenes Detection

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In‐Situ Generated CsPbBr₃ Nanocrystals on O‐Defective WO₃ for Photocatalytic CO₂ Reduction

In‐Situ Generated CsPbBr₃ Nanocrystals on O‐Defective WO₃ for Photocatalytic CO₂ Reduction