Recent Progress in Conjugated Polymers-Based Donor–Acceptor Semiconductor Materials for Photocatalytic Hydrogen Evolution from Water Splitting

Zhao, Yanhui; Sheng, J; Xin, Zhao; mo, jian; Wang, Jilong; Chen, Zhuang; Dong, Hongjun; Li, Chunmei

doi:10.3390/catal13050850

Cited by 8 publications

(1 citation statement)

References 106 publications

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“…Donor-acceptor (D-A) conjugated polymers with alternating structures have emerged as promising photocatalysts for hydrogen generation [ 48 , 49 , 50 ], owing to the intramolecular pull-push effect of D-A structure that would promote electron (e − )/hole (h + ) separation in the presence of light irradiation [ 51 , 52 , 53 ]. To our knowledge, organic–inorganic heterojunctions composed of D-A type CPs and TiO 2 have rarely been investigated to date.…”

Section: Introductionmentioning

confidence: 99%

Functionalized Linear Conjugated Polymer/TiO2 Heterojunctions for Significantly Enhancing Photocatalytic H2 Evolution

Gong,

Xing,

et al. 2024

Molecules

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Conjugated polymers (CPs) have attracted much attention in recent years due to their structural abundance and tunable energy bands. Compared with CP-based materials, the inorganic semiconductor TiO2 has the advantages of low cost, non-toxicity and high photocatalytic hydrogen production (PHP) performance. However, studies on polymeric-inorganic heterojunctions, composed of D-A type CPs and TiO2, for boosting the PHP efficiency are still rare. Herein, an elucidation that the photocatalytic hydrogen evolution activity can actually be improved by forming polymeric-inorganic heterojunctions TFl@TiO2, TS@TiO2 and TSO2@TiO2, facilely synthesized through efficient in situ direct C–H arylation polymerization, is given. The compatible energy levels between virgin TiO2 and polymeric semiconductors enable the resulting functionalized CP@TiO2 heterojunctions to exhibit a considerable photocatalytic hydrogen evolution rate (HER). Especially, the HER of TSO2@TiO2 heterojunction reaches up to 11,220 μmol g−1 h−1, approximately 5.47 and 1260 times higher than that of pristine TSO2 and TiO2 photocatalysts. The intrinsic merits of a donor-acceptor conjugated polymer and the interfacial interaction between CP and TiO2 account for the excellent PHP activity, facilitating the separation of photo-generated excitons. Considering the outstanding PHP behavior, our work discloses that the coupling of inorganic semiconductors and suitable D-A conjugated CPs would play significant roles in the photocatalysis community.

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Section: Introductionmentioning

confidence: 99%

Functionalized Linear Conjugated Polymer/TiO2 Heterojunctions for Significantly Enhancing Photocatalytic H2 Evolution

Gong,

Xing,

et al. 2024

Molecules

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Solvated Electrons Generated on the Surface of Na‐SPHI for Boosting Visible Light Photocatalytic Hydrogen Evolution with Ultra‐High AQE

Li,

Ge,

Zhang

et al. 2024

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Enhancing the utilization of visible‐light‐active semiconductors with an excellent apparent quantum efficiency (AQE) remains a significant and challenging goal in the realm of photocatalytic water splitting. In this study, a fully condensed sulfur‐doped poly(heptazine imide) metalized with Na (Na‐SPHI) is synthesized by an ionothermal method by using eutectic NaCl/LiCl mixture as the ionic solvent. Comprehensive characterizations of the obtained Na‐SPHI reveal several advantageous features, including heightened light absorption, facilitated exciton dissociation, and expedited charge transfer. More importantly, solvated electron, powerful reducing agents, can be generated on the surface of Na‐SPHI upon irradiation with visible light. Benefiting from above advantage, the Na‐SPHI exhibits an excellent H2 evolution rate of 571.8 µmol·h−1 under visible light illumination and a super‐high AQE of 61.7% at 420 nm. This research emphasizes the significance of the solvated electron on the surface of photocatalyst in overcoming the challenges associated with visible light‐driven photocatalysis, showcasing its potential application in photocatalytic water splitting.

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Multiple Electron Transfer in Semiconductive Ternary D‐D'‐A Metal‐Organic Framework for Enhanced X‐Ray Detection and Imaging

Wei,

Liu,

et al. 2024

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Semiconductive metal–organic frameworks (MOFs) with donor–acceptor (D–A) characteristics have garnered attractive attention due to their capacity for separating and transferring photogenerated charges, making them promising candidates for high‐performance X‐ray detectors. However, the low charge transfer efficiency between the metal nodes and organic ligands limits the X‐ray‐to‐electricity conversion efficiency of these materials. Herein, an additional photoactive donor (D’) is introduced by incorporating a heavy atom‐containing polyoxometalate (POM) [α‐SiW12O40]4− into a binary {[Ni·bcbp·(H2O)2]·(H2O)4·Cl}n (Ni‐bcbp, bcbp: H2bcbp·2Cl = 1,1′‐bis(4‐carboxyphenyl)(4,4′‐bipyridinium) dichloride) MOF, resulting in a semiconductive ternary D‐D'‐A framework {[Ni2(bcbp)2·(H2O)4·(DMA)]·(SiW12O40)}n (SiW@Ni‐bcbp, DMA: dimethylacetamide). The obtained material features an unprecedented porous 8‐connected bcu‐net structure that accommodates nanoscale [α‐SiW12O40]4− counterions, displaying uncommon optoelectronic responses. In contrast to binary Ni‐bcbp, the SiW@Ni‐bcbp framework exhibits distinctive photochromism and robust X‐ray responsiveness, which can be attributed to the synergistic effects of the electron reservoir and multiple photoinduced electron transfer originating from the POMs. As a result, the X‐ray detector based on SiW@Ni‐bcbp demonstrates a sensitivity of 5741.6 µC Gyair−1 cm−2 with a low detection limit of 0.49 µGyair s−1. Moreover, the devices demonstrated the capability of producing clearness X‐ray images, providing a feasible and stable solution for constructing high‐performance direct X‐ray detectors.

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Recent Progress in Conjugated Polymers-Based Donor–Acceptor Semiconductor Materials for Photocatalytic Hydrogen Evolution from Water Splitting

Cited by 8 publications

References 106 publications

Functionalized Linear Conjugated Polymer/TiO2 Heterojunctions for Significantly Enhancing Photocatalytic H2 Evolution

Functionalized Linear Conjugated Polymer/TiO2 Heterojunctions for Significantly Enhancing Photocatalytic H2 Evolution

Solvated Electrons Generated on the Surface of Na‐SPHI for Boosting Visible Light Photocatalytic Hydrogen Evolution with Ultra‐High AQE

Multiple Electron Transfer in Semiconductive Ternary D‐D'‐A Metal‐Organic Framework for Enhanced X‐Ray Detection and Imaging

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