Improving the photocatalytic hydrogen evolution of UiO-67 by incorporating Ce4+-coordinated bipyridinedicarboxylate ligands

An, Yang; Liu, Yuanyuan; Bian, Hongtao; Wang, Zeyan; Wang, Peng; Zheng, Zhaoke; Dai, Ying; Whangbo, Myung‐Hwan; Huang, Baibiao

doi:10.1016/j.scib.2019.07.030

Cited by 57 publications

(47 citation statements)

References 66 publications

(87 reference statements)

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“…The OH vibration of the carboxyl group at 2500–3000 cm −1 disappeared in the UiO‐67 and UiO‐67@TiO 2 NRs, indicating the H of COOH was replaced by zirconium because of the coordination reaction. [ 46 ]…”

Section: Resultsmentioning

confidence: 99%

“…The OH vibration of the carboxyl group at 2500-3000 cm −1 disappeared in the UiO-67 and UiO-67@TiO 2 NRs, indicating the H of COOH was replaced by zirconium because of the coordination reaction. [46] We further investigated the interfacial state and atomic coupling between the TiO 2 NR and UiO-67 in the heterostructure by X-ray photoelectron spectroscopy (XPS). As shown in Figure 2a, the binding energy of O at 530.1 eV in the UiO-67@ TiO 2 is in coincidence with that of the TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

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Conjugated π Electrons of MOFs Drive Charge Separation at Heterostructures Interface for Enhanced Photoelectrochemical Water Oxidation

Wang

Sun

Tian

et al. 2021

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Photoanode material with high efficiency and stability is extensively desirable in photoelectrochemical (PEC) water splitting for green/renewable energy source. Herein, novel heterostructures is constructed via coating rutile TiO2 nanorods with metal organic framework (MOF) materials UiO‐66 or UiO‐67 (UiO‐66@TiO2 and UiO‐67@TiO2), respectively. The π electrons in the MOF linkers could increase the local electronegativity near the heterojunction interface due to the conjugation effect, thereby enhancing the internal electric field (IEF) at the heterojunction interface. The IEF could drive charge transfer following Z‐scheme mechanism in the prepared heterostructures, inducing photogenerated charge separation efficiency increasing as 156% and 253% for the UiO‐66@TiO2 and UiO‐67@TiO2, respectively. Correspondingly, the UiO‐66@TiO2 and UiO‐67@TiO2 enhanced the photocurrent density as approximate two‐ and threefolds compared with that of pristine TiO2 for PEC water oxidation in universal pH electrolytes. This work demonstrates an effective method of regulating the IEF of heterojunction toward further improved charge separation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Conjugated π Electrons of MOFs Drive Charge Separation at Heterostructures Interface for Enhanced Photoelectrochemical Water Oxidation

Wang

Sun

Tian

et al. 2021

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“…[86] An et al fabricated a Ce 4+ doped UiO-67, based on dianion of biphenyl-4,4′-dicarboxylic acid as linker. [87] The further test of photocatalytic performance indicated that the doped Ce can improve the HER rate from 26.78 to 269.6 µmol g −1 h −1 . Additionally, Ce element doping in traditional photocatalytic materials can also promote their catalytic performance.…”

Section: Photocatalysis For Energy Conversionmentioning

confidence: 96%

Rare‐Earth‐Based Metal–Organic Frameworks as Multifunctional Platforms for Catalytic Conversion

Shi

Cao

Liu

et al. 2021

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“…H 2 is considered to be a green and renewable energy source to substitute traditional energy sources due to its high calorific value as well as environmental‐friendliness. [ 272,273 ] Photocatalytic water splitting to produce H 2 based on semiconductors photocatalysts has been regarded as a sustainable and low‐cost method. [ 274,275 ] In recent years, although a large number of reports about semiconductor‐based photocatalysts for H 2 evolution have been highlighted, [ 276–280 ] obtaining higher catalytic activity with these semiconductors remains challenges.…”

Section: The Photocatalysis Applications Of the Mofs‐based Compositesmentioning

confidence: 99%

A Review of MOFs and Their Composites‐Based Photocatalysts: Synthesis and Applications

Qian

Zhang

Pang

2021

Adv Funct Materials

321

157

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Photocatalysis is considered to be a green and environment‐friendly technology since it can convert solar energy into other types of chemical energies. Over the past several years, metal‐organic frameworks (MOFs)‐based photocatalysts have received remarkable research interest due to their unique morphology, high photocatalytic performance, good chemical stability, easy synthesis, and low cost. In this review, the synthetic strategies of developing MOFs‐based photocatalysts are first introduced. Second, the recent progress in the fabrication of various types of MOFs composites photocatalysts is summarized. Third, the different applications including hydrogen evolution reaction, oxygen evolution reaction, overall water splitting, nitrogen reduction reaction, carbon dioxide reduction reaction as well as photodegradation of organic pollutants of MOFs‐based photocatalysts are summed up. Finally, the challenges and some suggestions for the future development of MOFs‐ and their composites‐based photocatalysts are also highlighted. It is expected that this report will help researchers to systematically devise and develop highly efficient photocatalysts based on MOFs and their composites.

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Improving the photocatalytic hydrogen evolution of UiO-67 by incorporating Ce4+-coordinated bipyridinedicarboxylate ligands

Cited by 57 publications

References 66 publications

Conjugated π Electrons of MOFs Drive Charge Separation at Heterostructures Interface for Enhanced Photoelectrochemical Water Oxidation

Conjugated π Electrons of MOFs Drive Charge Separation at Heterostructures Interface for Enhanced Photoelectrochemical Water Oxidation

Rare‐Earth‐Based Metal–Organic Frameworks as Multifunctional Platforms for Catalytic Conversion

A Review of MOFs and Their Composites‐Based Photocatalysts: Synthesis and Applications

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