Rational design of cocatalyst system for improving the photocatalytic hydrogen evolution activity of graphite carbon nitride

Li, Kui; Lin, Ye-Zhan; Wang, Kai; Wang, Yanju; Zhang, Yu; Zhang, Yuzhuo; Liu, Futian

doi:10.1016/j.apcatb.2019.118402

Cited by 104 publications

(44 citation statements)

References 64 publications

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“…49 Additionally, the C 1s spectra showed three peaks at 284.3, 285.8, and 287.9 eV, which could belong to CC, C−C, and C−O of Bi-MOF, respectively (Figure 3d). 20,50 This demonstrated that Bi-MOF and BiOBr coexisted, which was consistent with the XRD results (Figure 2a).…”

Section: ■ Results and Discussionsupporting

confidence: 89%

“…As shown in Figure c, the O 1s XPS spectrum of BiOBr could be deconvoluted into three peaks at 529.4, 530.8, and 532.3 eV, which were attributed to Bi–O, the surface −OH, and absorbed H 2 O (O w ), respectively. , Significantly, the proportion of surface −OH was enhanced in comparison with pristine BiOBr, while the percentage of Bi–O decreased, which was in agreement with EDS results and further determined the existence of Bi-MOF on the surface of BiOBr. , Noteworthily, compared to the original BiOBr, the binding energies of Bi 4f, Br 3d, and O 1s in BiOBr@Bi-MOF show significant positive shifts, suggesting that photogenerated electrons on the surface of BiOBr tended to migrate to Bi-MOF, thereby improving the separation efficiency of electron–hole pairs . Additionally, the C 1s spectra showed three peaks at 284.3, 285.8, and 287.9 eV, which could belong to CC, C–C, and C–O of Bi-MOF, respectively (Figure d). , This demonstrated that Bi-MOF and BiOBr coexisted, which was consistent with the XRD results (Figure a).…”

Section: Resultssupporting

confidence: 82%

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Self-Assembly of a 3D Hollow BiOBr@Bi-MOF Heterostructure with Enhanced Photocatalytic Degradation of Dyes

Jiang

et al. 2021

ACS Appl. Mater. Interfaces

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116

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Considering the flexibility, adjustable pore structure, and abundant active sites of metal–organic frameworks (MOFs), rational design and fine control of the MOF-based hetero-nanocrystals is a highly important and challenging subject. In this work, self-assembly of a 3D hollow BiOBr@Bi-MOF microsphere was fabricated through precisely controlled dissociation kinetics of the self-sacrificial template (BiOBr) for the first time, where the residual quantity of BiOBr and the formation of Bi-MOF were carefully regulated by changing the reaction time and the capability of coordination. Meanwhile, the hollow microstructure was formed in BiOBr@Bi-MOF through the Oswald ripening mechanism to separate photogenerated electron–hole pairs and increase the adsorption capacity of Bi-MOF for dyes, which significantly enhanced the photocatalytic degradation efficiency of RhB from 56.4% for BiOBr to 99.4% for the optimal BiOBr@Bi-MOF microsphere. This research broadens the selectivity of semiconductor/MOF hetero-nanocrystals with reasonable design and flexible synthesis.

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Section: ■ Results and Discussionsupporting

confidence: 89%

Section: Resultssupporting

confidence: 82%

Self-Assembly of a 3D Hollow BiOBr@Bi-MOF Heterostructure with Enhanced Photocatalytic Degradation of Dyes

Jiang

et al. 2021

ACS Appl. Mater. Interfaces

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116

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“…Cocatalysts for oxygen evolution reaction (OER) mainly include cobalt phosphate (CoPi) [ 36 ], iron hydroxide oxide (FeOOH) [ 37 ], nickel oxide (NiO x ) [ 38 ], ceria (CeO x ) [ 39 ], RuO 2 [ 40 ], cobalt oxide (CoO x ) [ 41 ] and manganese oxide (MnO x ) [ 42 ]. Highly active cocatalysts for CO 2 reduction reaction (CO 2 RR) primarily contain Au [ 43 ], Ag [ 44 ], Cu [ 45 ], Mn [ 46 ], MoS 2 [ 47 ] and CdS [ 48 ]. Moreover, adjusting the composition and ratio of metals, metallic alloy or other composite cocatalysts can be helpful in improving the selectivity of CO 2 reduction products [ 49 – 51 ].…”

Section: Materials For Eapmentioning

confidence: 99%

Extraterrestrial artificial photosynthetic materials for in-situ resource utilization

Yang

Zhang

et al. 2021

National Science Review

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Missions as aerospace milestones in human history, including returning to the moon and manned Martian missions, are being implemented in recent years. Space exploration has become one of the global common goals. And the survival and development of human beings in the extraterrestrial extreme environment is becoming the basic ability and technology for manned space exploration. For the purpose of fulfilling the goal of extraterrestrial survival, researchers in Nanjing University and the China Academy of Space Technology proposed the extraterrestrial artificial photosynthesis (EAP) technology. By simulating natural photosynthesis of green plants on the earth, EAP converts CO2/H2O into fuels and oxygen in an in-situ, accelerated and controllable manner by using waste CO2 in confined space of spacecrafts, or abundant CO2 resources in extraterrestrial celestial environment, e.g. the Mars. Thus, the material loading of manned spacecraft can be greatly reduced to support affordable and sustainable deep space exploration. In this paper, the EAP technology was compared with the existing methods of converting CO2/H2O into fuel and oxygen in the aerospace field, especially Sabatier method and Bosch reduction method. And the research progress of possible EAP materials for in-situ utilization of extraterrestrial resources were discussed in depth. This review finally listed the challenges that EAP process may encounter with, which need to be focused on for the future implementation and application. We expected to deepen the understanding of artificial photosynthetic materials and technologies, aiming to strongly support the development of manned spaceflight.

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“…However, very few reports focus on this operation. In most PC-HER studies, a water-circulation system is usually employed to eliminate the infrared thermal effect (solar heat) to keep the temperature constantly at 25 °C − or sometimes 5 or 35 °C. − It can be expected that these conditions may not be the optimal operation temperature and cost-effective at the industrial level. Thus, it is urgently needed to have a comprehensive investigation of the solar-heat-induced temperature change in the PC-HER for appropriate tactics.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Induced Variations in Photocatalyst Properties and Photocatalytic Hydrogen Evolution: Differences in UV, Visible, and Infrared Radiation

Lin

et al. 2021

ACS Sustainable Chem. Eng.

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In this work, solar-heating-induced temperature-based photocatalytic hydrogen evolution reaction (PC-HER) of different photocatalysts (TiO 2 P25, g-C 3 N 4 , and their loaded Pt) was comprehensively studied and analyzed with the assistance of a series of temperature-based in situ characterizations. It was found that pristine TiO 2 P25 and g-C 3 N 4 displayed enhanced PC-HER performances with increasing temperature (25−65 °C), while their loaded Pt nanoparticles (NPs) demonstrated a different behavior under ultraviolet (UV) or visible irradiation, presenting the highest hydrogen evolution rate at 35 °C. More interestingly, Pt NPs-g-C 3 N 4 showed increasing PC-HER performances from 25 to 65 °C under visible light irradiation. Characterizations suggested that lowered electrical impedance, reduced band gap, increased light absorption, and elongated photoelectron lifetime with increased temperature are beneficial for improved PC-HER. However, agglomeration of Pt NPs significantly deteriorated the PC-HER performance at higher temperature and UV light can aggravate the thermal agglomeration of Pt NPs.

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Rational design of cocatalyst system for improving the photocatalytic hydrogen evolution activity of graphite carbon nitride

Cited by 104 publications

References 64 publications

Self-Assembly of a 3D Hollow BiOBr@Bi-MOF Heterostructure with Enhanced Photocatalytic Degradation of Dyes

Self-Assembly of a 3D Hollow BiOBr@Bi-MOF Heterostructure with Enhanced Photocatalytic Degradation of Dyes

Extraterrestrial artificial photosynthetic materials for in-situ resource utilization

Temperature-Induced Variations in Photocatalyst Properties and Photocatalytic Hydrogen Evolution: Differences in UV, Visible, and Infrared Radiation

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