Efficient photocatalytic overall water splitting by synergistically enhancing bulk charge separation and surface reaction kinetics in Co3O4–decorated ZnO@ZnS core-shell structures

Zhang, Qingsong; Xiao, Yang; Li, Yiming; Zhao, Kaiyuan; Deng, Huifang; Lou, Yongbing; Chen, Jinxi; Yu, Hui; Cheng, Lin

doi:10.1016/j.cej.2020.124681

Cited by 73 publications

(36 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the EIS diagrams in Figure 10b, the 10-CeO 2 /ZnS-CuS sample had the smallest arc radius, it indicated that the impedance of 10-ZnS/CeO 2 sample was significantly reduced by the decorated CuS cocatalyst, the carrier transfer efficiency was enhanced, and the 10-CeO 2 /ZnS-CuS sample had the strongest of electronic-hole separation ability Figure 10c showed the Tafel curve of the XÀ CeO 2 /ZnS and 10-CeO 2 /ZnS-CuS samples, the anodic Tafel slope of the 10-CeO 2 /ZnS-CuS sample was the largest, the 10-CeO 2 /ZnS-CuS sample should has the fastest electron transfer and the highest photocatalytic activity. [49] These electrochemical test results were consistent with the PL spectra and hydrogen production performance tests.…”

Section: Photocatalytic Mechanism Of Ceo 2 /Zns-cus Compositesupporting

confidence: 80%

Noble‐metal‐free MOF Derived ZnS/CeO₂ Decorated with CuS Cocatalyst Photocatalyst with Efficient Photocatalytic Hydrogen Production Character

Wang

Xiao

et al. 2020

ChemCatChem

Self Cite

View full text Add to dashboard Cite

Inspired by the rich morphology of ZnO and cation-exchange technology, regular dodecahedron-like CeO 2 /ZnO was obtained by the calcination of Ce doped ZIF-8 precursor in this study, and CeO 2 /ZnS was obtained by the in-situ vulcanization of CeO 2 /ZnO. This design not only maintained the morphology of ZIF-8, but also enhanced the oxidation-reduction capacity of the catalyst. When the Ce content was 10 wt %, 10-CeO 2 /ZnS sample showed the best photocatalytic hydrogen production performance in all XÀ CeO 2 /ZnS samples. Loading of co-catalysts can effectively enhance the surface hydrogen reduction in photocatalytic water splitting by introducing a positive Schottky barrier. CuS was regarded as a promising cocatalyst to replace the noble metals due to its low cost and equivalent or even better performance. The in-situ cation exchange method was used to load co-catalyst CuS on the 10-CeO 2 /ZnS composites to obtain the 10-CeO 2 /ZnS-CuS composites which had the large specific surface area, regular dodecahedral structure and much excellent photolysis of water to produce hydrogen characters. This work provided a new strategy for the advantages combining of co-catalyst, p-n junction as well as the porous structure to enhance the photocatalytic characters.

show abstract

Section: Photocatalytic Mechanism Of Ceo 2 /Zns-cus Compositesupporting

confidence: 80%

Noble‐metal‐free MOF Derived ZnS/CeO₂ Decorated with CuS Cocatalyst Photocatalyst with Efficient Photocatalytic Hydrogen Production Character

Wang

Xiao

et al. 2020

ChemCatChem

Self Cite

View full text Add to dashboard Cite

show abstract

“…It can be seen from Table that the S BET of NiTiO 3 is as high as 16.29 m 2 g –1 , which is related the microstructure of the material. The tubular NiTiO 3 formed by the self-assembled of nanoparticles has more pores and rough surface than a normal tubular structure, which is beneficial to the penetration of incident light and the adsorption of dyes . Second, the S BET (14.57 m 2 g –1 ) of the composite catalyst NCGD-5 is slightly lower than that of NiTiO 3 , but the hydrogen production activity has been greatly improved.…”

Section: Resultsmentioning

confidence: 99%

“…The tubular NiTiO 3 formed by the self-assembled of nanoparticles has more pores and rough surface than a normal tubular structure, which is beneficial to the penetration of incident light and the adsorption of dyes. 57 Second, the S BET (14.57 m 2 g −1 ) of the composite catalyst NCGD-5 is slightly lower than that of NiTiO 3 , but the hydrogen production activity has been greatly improved. Figure 5 shows that in the current reaction system, the change of S BET did not make a positive contribution to the hydrogen production activity.…”

Section: Xps Analysismentioning

confidence: 96%

Graphdiyne Based Ternary GD-CuI-NiTiO₃ S-Scheme Heterjunction Photocatalyst for Hydrogen Evolution

Yan

Liu

Jin

2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

As the demand of fossil fuels continues to expand, hydrogen energy is considered a promising alternative energy. In this work, the NiTiO 3 −CuI-GD ternary system was successfully constructed based on morphology modulation and energy band structure design. First, the one-pot method was used to cleverly embed the cubes CuI in the stacked graphdiyne (GD) to prepare the hybrid CuI-GD, and CuI-GD was anchored on the surface of NiTiO 3 by simple physical stirring. The unique spatial arrangement of the composite catalyst was utilized to improve the hydrogen production activity under light. Second, to combine various characterization tools and energy band structures, we proposed an step-scheme (S-scheme) heterojunction photocatalytic reaction mechanism, among them, the tubular NiTiO 3 formed by the selfassembled of nanoparticles provided sufficient sites for the anchoring of CuI-GD, and the thin layer GD acted as an electron acceptor to capture a large number of electrons with the help of the conjugated carbon network; cubes CuI could consume holes in the reaction system; the loading of CuI-GD greatly improved the oxidation and reduction ability of the whole catalytic system. The S-scheme heterojunction accelerated the transfer of carriers and improved the separation efficiency. The experiment provides a new insight into the construction of an efficient and eco-friendly multicatalytic system.

show abstract

“…As a promising nanozyme, Co 3 O 4 can react with H 2 O 2 to generate O 2 to alleviate tumor hypoxia, therefore it can be introduced to activate the enzymatic activity of GOx. − Recently, transition metal oxides including Co 3 O 4 derived from metal–organic frameworks (MOFs) have been extensively investigated in the field of catalysts and supercapacitors. , The high surface area and high porosity of MOFs make them ideal templates for the construction of efficient porous nanozymes, in which abundant active sites were exposed and effective electron transfer was realized. , Co 3 O 4 derived from MOFs is expected to be an efficient catalase-like nanozyme, which can provide oxygen for GOx to oxidize glucose, cut off the nutrition supply of tumor, and enhance the effects of starvation therapy. The introduction of a secondary metal into the monometallic oxide counterpart is a common method to adjust its catalyst activity and size, which is important for biomedical applications. − Therefore, secondary metal doped Co 3 O 4 with an appropriate size may have a prospect in synergistic catalytic and starvation therapy.…”

Section: Introductionmentioning

confidence: 99%

A Three-in-one ZIFs-Derived CuCo(O)/GOx@PCNs Hybrid Cascade Nanozyme for Immunotherapy/Enhanced Starvation/Photothermal Therapy

Wang

Niu

Shi

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Glucose oxidase (GOx) is regarded as an ideal endogenous natural enzyme for tumor starvation therapy and photothermal therapy (PTT) is a promising strategy for the ablation of primary tumor. In this work, Cu-doped cobalt oxide and porous carbon nanocomposites (CuCo(O)@PCNs) were synthesized from double-layered ZIF-8@ZIF-67 and GOx was loaded in the porous carbon to form a CuCo(O)/GOx@PCNs hybrid nanozyme. CuCo(O) was characterized as the Cu0.3Co2.7O4 phase through X-ray diffraction analysis and it can react with H2O2 to generate O2 and alleviate tumor hypoxia, resulting in the recovered enzymatic activity of GOx and the enhanced starvation therapy. The porous nanocarbon can ablate the primary tumor because of its high photothermal conversion efficiency of 40.04%. The three-in-one functions of oxygen supply, glucose consumption, and photothermal conversion were realized in the ZIFs-derived CuCo(O)/GOx@PCNs nanozyme and the starvation therapy effect was improved by PTT and oxygen supplement. Furthermore, the inhibition effect of CuCo(O)/GOx@PCNs on metastatic tumor is similar to combined therapy of the nanozyme and the immune checkpoint-blocking antibody, α-PD-1. The related antitumor immune mechanism was studied through the analysis of immune-related proinflammatory cytokines and the activated T cells. This work may provide new ideas for the development and application of the ZIFs-derived hybrid nanozyme in tumor therapy and the CuCo(O)/GOx@PCNs nanozyme may be a promising alternative to immune checkpoint inhibitors.

show abstract

Efficient photocatalytic overall water splitting by synergistically enhancing bulk charge separation and surface reaction kinetics in Co3O4–decorated ZnO@ZnS core-shell structures

Cited by 73 publications

References 62 publications

Noble‐metal‐free MOF Derived ZnS/CeO₂ Decorated with CuS Cocatalyst Photocatalyst with Efficient Photocatalytic Hydrogen Production Character

Noble‐metal‐free MOF Derived ZnS/CeO₂ Decorated with CuS Cocatalyst Photocatalyst with Efficient Photocatalytic Hydrogen Production Character

Graphdiyne Based Ternary GD-CuI-NiTiO₃ S-Scheme Heterjunction Photocatalyst for Hydrogen Evolution

A Three-in-one ZIFs-Derived CuCo(O)/GOx@PCNs Hybrid Cascade Nanozyme for Immunotherapy/Enhanced Starvation/Photothermal Therapy

Contact Info

Product

Resources

About

Efficient photocatalytic overall water splitting by synergistically enhancing bulk charge separation and surface reaction kinetics in Co3O4–decorated ZnO@ZnS core-shell structures

Cited by 73 publications

References 62 publications

Noble‐metal‐free MOF Derived ZnS/CeO2 Decorated with CuS Cocatalyst Photocatalyst with Efficient Photocatalytic Hydrogen Production Character

Noble‐metal‐free MOF Derived ZnS/CeO2 Decorated with CuS Cocatalyst Photocatalyst with Efficient Photocatalytic Hydrogen Production Character

Graphdiyne Based Ternary GD-CuI-NiTiO3 S-Scheme Heterjunction Photocatalyst for Hydrogen Evolution

A Three-in-one ZIFs-Derived CuCo(O)/GOx@PCNs Hybrid Cascade Nanozyme for Immunotherapy/Enhanced Starvation/Photothermal Therapy

Contact Info

Product

Resources

About

Noble‐metal‐free MOF Derived ZnS/CeO₂ Decorated with CuS Cocatalyst Photocatalyst with Efficient Photocatalytic Hydrogen Production Character

Noble‐metal‐free MOF Derived ZnS/CeO₂ Decorated with CuS Cocatalyst Photocatalyst with Efficient Photocatalytic Hydrogen Production Character

Graphdiyne Based Ternary GD-CuI-NiTiO₃ S-Scheme Heterjunction Photocatalyst for Hydrogen Evolution