Effect of HPMC on the Piezoresistivity of Smart Concrete Aggregate with Z Shape

Wang, Haifeng; Han-dong, Yan; Mei, Zhen

doi:10.1007/s11595-020-2319-0

Cited by 9 publications

(8 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We speculate that amorphous NiCo 2 S 4 has the disadvantages of low surface area phase and disordered structure, while high crystallinity NiCo 2 S 4 has fewer hydrogen bonds and reduced active sites. [ 54 ] As a result, the hydrogen evolution capacity of both is not optimal. In Figure S4 (Supporting Information), TEM images of NiCo 2 S 4 show that NiCo 2 S 4 has crystal and amorphous planes, which confirms the semi‐crystalline structure of NiCo 2 S 4 .…”

Section: Resultsmentioning

confidence: 99%

In Situ XPS Proved Efficient Charge Transfer of S‐Scheme Heterjunction Based on Graphdiyne (g‐C_nH_2n‐2) Nanosheets Coupling with Semi‐Crystalline NiCo₂S₄ for Efficient Photocatalytic H₂ Evolution

Fan,

Hao,

Shao

et al. 2023

Advanced Sustainable Systems

View full text Add to dashboard Cite

The excessive utilization of fossil fuels has resulted in an energy crisis. The implementation of a heterojunction for photocatalytic hydrogen evolution represents a promising solution to the current energy predicament. In this work, a 0D/2D S‐scheme graphdiyne/NiCo2S4 (GDY/NiCo2S4) heterojunction is constructed by semi‐crystalline NiCo2S4 nanoparticles (NPs) immobilized on the surface of GDY nanosheets through hydrothermal method. Atomic force microscopy (AFM) demonstrated the thickness of GDY nanosheets is 2.8 nm. The unique 2D laminar structure and porous structure of GDY ensures a tight bond with NiCo2S4 NPs. The maximum rate of photocatalytic hydrogen production is 6682.6 µmol h−1 g−1 over 15% GDY/NiCo2S4, which is much higher than GDY and NiCo2S4. The outstanding photocatalytic hydrogen production performance can be attributed to the S‐scheme GDY/NiCo2S4 heterostructure. The fluorescence results demonstrated that the incorporation of GDY significantly enhanced the efficiency of photoelectron‐hole transfer and prolonged the electron lifetime. The S‐scheme photogenerated charge transfer mechanism is verified through in situ irradiated X‐ray photoelectron spectroscopy. The present study introduces innovative concepts for the design of an S‐scheme heterojunction based on graphdiyne, aiming to enhance photocatalytic hydrogen production.

show abstract

Section: Resultsmentioning

confidence: 99%

In Situ XPS Proved Efficient Charge Transfer of S‐Scheme Heterjunction Based on Graphdiyne (g‐C_nH_2n‐2) Nanosheets Coupling with Semi‐Crystalline NiCo₂S₄ for Efficient Photocatalytic H₂ Evolution

Fan,

Hao,

Shao

et al. 2023

Advanced Sustainable Systems

View full text Add to dashboard Cite

show abstract

“…In addition, the stability of the photocatalyst is another important means of characterizing the photocatalytic activity. [ 47–49 ] The photocatalytic cycle test of the composite photocatalyst Zn 0.5 Cd 0.5 S/W‐S‐P‐15 is shown in Figure 7E. Zn 0.5 Cd 0.5 S/W‐S‐P‐15 photocatalyst was tested continuously without adding any catalyst and sacrificial reagent for 20 h. And the gas in the reaction flask was replaced with nitrogen before the start of each cycle to ensure the accuracy of the experiment.…”

Section: Resultsmentioning

confidence: 99%

Amorphous W‐S‐P Modified Zn_xCd_1−xS with Tunable Band Structure for Efficient Photocatalytic Overall Water Splitting

Chang,

Li,

Guo

et al. 2023

Solar RRL

View full text Add to dashboard Cite

The photocatalytic overall water splitting performance of the bandgap controllable ZnxCd1−xS solid solution is still restricted by its photo‐corrosion. In this study, amorphous tungsten phosphosulphide (W‐S‐P) modified ZnxCd1−xS solid solution is successfully prepared as a visible‐light‐driven photocatalyst and an efficient and stable ZnxCd1−xS/W‐S‐P heterojunction is constructed through intimate W‐S covalent bonds for efficient photocatalytic overall water splitting. The hydrogen evolution rate of the composite catalyst reached 18899.6 μmol g−1 h−1, which is 86 times and 5 times higher than that of W‐S‐P and Zn0.5Cd0.5S, respectively. At this time, the precipitation rates of H2 and O2 were 157.07 μmol g−1 h−1 and 78.05 μmol g−1 h−1 without any noble metal catalyst. In this work, the overall water splitting efficiency of the catalyst is greatly improved by constructing a ZnxCd1−xS/W‐S‐P Schottky heterojunction, which further inhibits the photo‐corrosion of the ZnxCd1−xS catalyst. At the same time, the strong internal electric field greatly improves the charge transfer efficiency. It provides a new idea for an in‐depth understanding of the chemical changes of elemental binding energy in ZnxCd1−xS solid solution and the design of new binary photocatalytic materials.

show abstract

“…[ 36 ] The C 1s spectra of GDY and Fe 3 O 4 /Co 3 O 4 /GDY are shown in Figure 4f, in which the binding energies of 284.81, 285.21, 286.11, and 289.28 eV affect the C–O bond and C = O group used for C‐C (sp 2 ), C‐C (sp 1 ), and surface adsorption, respectively. [ 37 ] In Fe 3 O 4 /Co 3 O 4 /GDY, the electron transfer forms a built‐in electric field, and the direction is from GDY to Fe 3 O 4 . The close‐contact heterogeneous interface will provide a channel for electron transport, thereby improving photocatalytic hydrogen evolution activity.…”

Section: Resultsmentioning

confidence: 99%

Rational Fabrication of Fe₃O₄/Co₃O₄/Graphdiyne Tandem Heterojunction toward Optimized Photocatalytic Hydrogen Evolution

Xie,

Wang,

et al. 2023

Solar RRL

View full text Add to dashboard Cite

Graphdiyne (GDY) is a novel two‐dimensional material composed of sp and sp2 hybridized carbon atoms. Herein, GDY nanosheets are prepared from tribromobenzene by a simple ball‐milling‐assisted reduction–elimination method and is introduced into Fe3O4 colloidal spheres and Co3O4 cubes by low‐temperature mixing to efficiently synthesize Fe3O4/Co3O4/GDY tandem heterojunction photocatalysts. The hydrogen evolution activity of the optimized catalyst is 4.02 mmol g−1 h−1 under visible light (λ ≥ 420 nm), which is 100.05, 10.05, and 3.65 times higher than that of Fe3O4 (0.04 mmol g−1 h−1), Co3O4 (0.40 mmol g−1 h−1), and GDY (1.10 mmol g−1 h−1), respectively. In addition, the Prussian blue analog (PBA)‐derived Co3O4 improves the light‐harvesting efficiency and reaction kinetics. More importantly, the establishment of tandem heterojunctions prompts energy‐level alignment and optimizes charge multichannel transfer, which is the dominant factor for enhanced photocatalytic activity. Combined with time‐resolved photoluminescence spectra, valence band X‐Ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy, and density functional theory calculations, the possible mechanism of Fe3O4/Co3O4/GDY series heterojunction is proposed and elucidated. This work provides a new idea for the construction of tandem heterojunctions based on graphdiyne and PBA derivatives.

show abstract

Effect of HPMC on the Piezoresistivity of Smart Concrete Aggregate with Z Shape

Cited by 9 publications

References 31 publications

In Situ XPS Proved Efficient Charge Transfer of S‐Scheme Heterjunction Based on Graphdiyne (g‐C_nH_2n‐2) Nanosheets Coupling with Semi‐Crystalline NiCo₂S₄ for Efficient Photocatalytic H₂ Evolution

In Situ XPS Proved Efficient Charge Transfer of S‐Scheme Heterjunction Based on Graphdiyne (g‐C_nH_2n‐2) Nanosheets Coupling with Semi‐Crystalline NiCo₂S₄ for Efficient Photocatalytic H₂ Evolution

Amorphous W‐S‐P Modified Zn_xCd_1−xS with Tunable Band Structure for Efficient Photocatalytic Overall Water Splitting

Rational Fabrication of Fe₃O₄/Co₃O₄/Graphdiyne Tandem Heterojunction toward Optimized Photocatalytic Hydrogen Evolution

Contact Info

Product

Resources

About

Effect of HPMC on the Piezoresistivity of Smart Concrete Aggregate with Z Shape

Cited by 9 publications

References 31 publications

In Situ XPS Proved Efficient Charge Transfer of S‐Scheme Heterjunction Based on Graphdiyne (g‐CnH2n‐2) Nanosheets Coupling with Semi‐Crystalline NiCo2S4 for Efficient Photocatalytic H2 Evolution

In Situ XPS Proved Efficient Charge Transfer of S‐Scheme Heterjunction Based on Graphdiyne (g‐CnH2n‐2) Nanosheets Coupling with Semi‐Crystalline NiCo2S4 for Efficient Photocatalytic H2 Evolution

Amorphous W‐S‐P Modified ZnxCd1−xS with Tunable Band Structure for Efficient Photocatalytic Overall Water Splitting

Rational Fabrication of Fe3O4/Co3O4/Graphdiyne Tandem Heterojunction toward Optimized Photocatalytic Hydrogen Evolution

Contact Info

Product

Resources

About

In Situ XPS Proved Efficient Charge Transfer of S‐Scheme Heterjunction Based on Graphdiyne (g‐C_nH_2n‐2) Nanosheets Coupling with Semi‐Crystalline NiCo₂S₄ for Efficient Photocatalytic H₂ Evolution

In Situ XPS Proved Efficient Charge Transfer of S‐Scheme Heterjunction Based on Graphdiyne (g‐C_nH_2n‐2) Nanosheets Coupling with Semi‐Crystalline NiCo₂S₄ for Efficient Photocatalytic H₂ Evolution

Amorphous W‐S‐P Modified Zn_xCd_1−xS with Tunable Band Structure for Efficient Photocatalytic Overall Water Splitting

Rational Fabrication of Fe₃O₄/Co₃O₄/Graphdiyne Tandem Heterojunction toward Optimized Photocatalytic Hydrogen Evolution