All-in-one: branched macromolecule-protected metal nanocrystals as integrated charge separation/motion centers for enhanced photocatalytic selective organic transformations

Mo, Qiao‐Ling; Lin, Xin; Wei, Zhi-Quan; Dai, Xiao-Cheng; Hou, Shuo; Li, Tao; Xiao, Fang‐Xing

doi:10.1039/d0ta05297c

Cited by 46 publications

(44 citation statements)

References 57 publications

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“…S8, † the survey spectrum of ZPM is similar to that of the blank ZIS with the presence of Zn, In, S and C elements, but N and Ti signals are hard to detect in the survey spectrum of ZPM, and this is probably due to the low loading amount of PDDA and MQDs. As reected by the high-resolution Zn 2p spectra of ZPM, two peaks at 1022.07 (Zn 2p 3/2 ) and 1045.27 (Zn 2p 1/2 ) eV are attributable to the Zn 2+ species, 31,32 which agrees with the high-resolution Zn 2p spectrum of ZIS (Fig. 1h).…”

Section: Structural Characterizationsupporting

confidence: 79%

“…Also, as revealed in Fig. 1iII, the high-resolution In 3d spectrum of ZPM with two peaks at 445.35 (In 2p 5/2 ) and 452.46 (In 2p 3/2 ) eV is ascribed to the In 3+ species, 31,32 which is consistent with the high-resolution In 3d spectra of ZIS (Fig. 1iI).…”

Section: Structural Characterizationsupporting

confidence: 79%

“…1c, the light absorption band edge of all these samples approaches 610 nm, which is attributed to the band-gap photoexcitation of the ZIS substrate. 31 It is worth noting that PDDA encapsulation exerts no substantial effect on the light absorption of ZIS NSs. This is consistent with the UV-vis absorption spectrum of the PDDA aqueous solution (Fig.…”

Section: Structural Characterizationmentioning

confidence: 99%

“…TMC NSs including ZnIn 2 S 4 (ZIS), CdS, CdIn 2 S 4 (CIS) and In 2 S 3 (IS) were fabricated by a low-temperature reuxing method, 31,32 and CdS NSs were prepared via a hydrothermal method. 17 Detailed information on the synthetic procedures is provided in the ESI.…”

Section: Preparation Of Tmc Nanosheets (Nss)mentioning

confidence: 99%

“…1e and Table S1, † the FTIR result of ZIS exhibits three typical peaks at 3430, 1620 and 1380 cm À1 which correspond to the -NH, -CONHand deformative vibration mode of -CH 3 from the ZIS precursor (TAA). 31,37 FTIR spectra of ZP and ZPM exhibit two peaks at 2923 and 2850 cm À1 corresponding to the bending vibration mode of the methylene (-CH 2 ) group, 25,28 which originate from the ultra-thin PDDA layer, indicating that PDDA has been encapsulated on the ZIS NS surface. Notably, an exclusive peak at 617cm À1 is visualized in the FTIR spectrum of ZPM, which is attributed to the Ti-C species from MQDs, 16,20 indicating that MQDs have been successfully graed on the ZP nanocomposite via electrostatic forces.…”

Section: Structural Characterizationmentioning

confidence: 99%

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Unleashing non-conjugated polymers as charge relay mediators

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et al. 2022

Chem. Sci.

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Section: Structural Characterizationsupporting

confidence: 79%

Section: Structural Characterizationsupporting

confidence: 79%

Section: Structural Characterizationmentioning

confidence: 99%

Section: Preparation Of Tmc Nanosheets (Nss)mentioning

confidence: 99%

Section: Structural Characterizationmentioning

confidence: 99%

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Unleashing non-conjugated polymers as charge relay mediators

Liu

Liang

et al. 2022

Chem. Sci.

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Polymer‐Mediated Electron Tunneling Towards Solar Water Oxidation

Wei

Hou

Zhu

et al. 2021

Adv Funct Materials

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Exploiting emerging artificial photosystems with regulated vectorial charge transfer pathways is retarded by the difficulties in precise interface modulation at the nanoscale level, deficiency of suitable assembly methodologies, and ultra-short charge lifetime. Herein, it is first conceptually demonstrated the general design of transition metal chalcogenides quantum dots (TMCs QDs)insulating polymer-metal oxides (MOs) electron-tunneling photo systems, wherein TMCs QDs are controllably layer-by-layer self-assembled on the MOs substrates assisted by an ultrathin insulating polymer interim layer. It is ascertained that electrons photoexcited over TMCs QDs in spatially highly ordered MOs/(TMCs QDs/polymer) n multilayered heterostructures can be unidirectionally extracted and tunneled to the MOs substrates across the intermediate insulating polymer layer by engendering the tandem charge transfer to accelerate the interfacial charge migration kinetics, thereby triggering the significantly boosted net efficiency of solar-driven photoelectrochemical water oxidation. This study would spark new inspirations for designing novel electron-tunneling photosystems for fine carrier modulation towards solar energy harvesting and conversion.

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Ultrathin 2D/2D ZnIn₂S₄/g‐C₃N₄ Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light

Dang

Xie

Dai

et al. 2021

Adv Materials Inter

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hydrogen combustion only produces water. Therefore, hydrogen as a promising energy for the future development can help to meet the future energy needs and solve environmental problems. [4,5] Semiconductor-based photocatalytic water splitting utilizing renewable solar energy for hydrogen production is considered to be a feasible technology with great promise. [6][7][8][9] According to the research of titanium dioxide (TiO 2 ) single crystal in photoelectrochemistry, Fujishima and Honda [10] pioneered the field of semiconductor photocatalysis. However, the wide band gap of metal oxide such as ZnO, [11][12][13][14] SnO 2 , [15][16][17][18] Nb 2 O 5 , [19][20][21] etc., makes them only respond to near-ultraviolet or ultraviolet light, resulting in low efficiency of solar energy. In fact, visible light accounts for 43% of sunlight, while ultraviolet ray accounts for merely 4%. Therefore, developing visible light-driven photocatalysts attracts widespread attention for purpose of making better use of solar energy. [22][23][24] Graphite carbon nitride (g-C 3 N 4 ) is an attractive nonmetallic conjugated polymer semiconductor, which has been extensively applied in photocatalytic water splitting because of its attractive electronic structure, excellent thermal and chemical stability, unique 2D layered structure, suitable band gap, low toxicity, etc. [25][26][27] However, the actual application of the original g-C 3 N 4 still suffers from the limitations of underutilization of visible light, lacking of catalytic active sites, hydrophobic surface, low carrier mobility, and rapid recombination of photoinduced carriers. [28,29] For addressing these challenges, various strategies have been adopted so as to improve the photocatalytic performance of the original g-C 3 N 4 , such as nanostructure design, [30][31][32] doping of metallic and nonmetallic elements, [33][34][35][36] construction of heterojunctions, [37][38][39][40] copolymerization, [41][42][43] defect engineering, and dye sensitization. [44,45] Among them, the controllable synthesis of nanoscale morphology is one of the resultful means. Because of its characteristics including appropriate porosity, massive surface groups for anchoring, large specific surface area, slim thickness and as well as high aspect ratio, semiconductor nanosheets describe a brilliant future. [46] Therefore, 2D g-C 3 N 4 nanosheets may significantly improve the photocatalytic activity. [47,48] Besides, integration with other semiconductors to build heterojunctions is considered to be a reliable means. [49][50][51] Ultrathin 2D/2D heterostructures usually Designation of high-efficiency water splitting photocatalyst is still a challenge in converting solar energy into chemical fuels. Heterojunction can inhibit recombination of carriers which is considered to be a reliable strategy to improve photocatalytic performance on water splitting. In this work, a "face-to-face" 2D tight heterostructure is constructed by growing ZnIn 2 S 4 nanosheets on g-C 3 N 4 nanosheets. Due to the ultrathin 2D structure...

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All-in-one: branched macromolecule-protected metal nanocrystals as integrated charge separation/motion centers for enhanced photocatalytic selective organic transformations

Abstract: Precise tuning of photoinduced charge separation and transport has been an enduringly central issue in photocatalysis but meets with limited success. In particular, controllable, accurate and simultaneous modulation on the...

Cited by 46 publications

References 57 publications

Unleashing non-conjugated polymers as charge relay mediators

Unleashing non-conjugated polymers as charge relay mediators

Polymer‐Mediated Electron Tunneling Towards Solar Water Oxidation

Ultrathin 2D/2D ZnIn₂S₄/g‐C₃N₄ Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light

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All-in-one: branched macromolecule-protected metal nanocrystals as integrated charge separation/motion centers for enhanced photocatalytic selective organic transformations

Abstract: Precise tuning of photoinduced charge separation and transport has been an enduringly central issue in photocatalysis but meets with limited success. In particular, controllable, accurate and simultaneous modulation on the...

Cited by 46 publications

References 57 publications

Unleashing non-conjugated polymers as charge relay mediators

Unleashing non-conjugated polymers as charge relay mediators

Polymer‐Mediated Electron Tunneling Towards Solar Water Oxidation

Ultrathin 2D/2D ZnIn2S4/g‐C3N4 Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light

Contact Info

Product

Resources

About

Ultrathin 2D/2D ZnIn₂S₄/g‐C₃N₄ Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light