Synthesis and Photocatalytic Hydrogen Production Performance of Furan based D-π-A type Linear Conjugated Polymer

doi:10.6023/A25040138

Acta Chimica Sinica ›› 2025, Vol. 83 ›› Issue (10): 1150-1156.DOI: 10.6023/A25040138 Previous Articles Next Articles

Article

呋喃基D-π-A型线性共轭聚合物的合成与光催化产氢性能研究

晋圣林^a, 韩昌志^a, 张崇^a, 胡道道^a^,^*(), 杨奔^a^,^*(), 蒋加兴^b^,^*()

^a 陕西师范大学材料科学与工程学院西安 710119
^b 江汉大学光电材料与技术学院武汉 430056

投稿日期:2025-04-28 发布日期:2025-08-12
通讯作者: 胡道道, 杨奔, 蒋加兴
基金资助:
国家自然科学基金(22175110); 国家自然科学基金(22375076); 湖北省自然科学基金会(2024AFA031); 武汉市重点研发计划(2024010802030157); 陕西师范大学研究生自由探索项目(LHRCTS23103); 以及中央高校基本科研业务费项目(GK202501012)

Synthesis and Photocatalytic Hydrogen Production Performance of Furan based D-π-A type Linear Conjugated Polymer

Shenglin Jin^a, Changzhi Han^a, Chong Zhang^a, Daodao Hu^a^,^*(), Ben Yang^a^,^*(), Jia-Xing Jiang^b^,^*()

^a School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710119
^b College of Optoelectronic Materials and Technology, Jianghan University, Wuhan 430056

Received:2025-04-28 Published:2025-08-12
Contact: Daodao Hu, Ben Yang, Jia-Xing Jiang
Supported by:
National Natural Science Foundation of China(22175110); National Natural Science Foundation of China(22375076); Hubei Provincial Natural Science Foundation of China(2024AFA031); Key Research and Development Program of Wuhan(2024010802030157); Graduate Free Exploration Project of Shaanxi Normal University(LHRCTS23103); Fundamental Research Funds for the Central Universities(GK202501012)

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Abstract

Organic conjugated polymers are considered a highly promising photocatalyst due to their diverse synthesis methods, controllable structural design, and abundant monomer building units, and have received widespread attention in the field of photocatalytic hydrogen production. However, the vast majority of organic conjugated polymers still face problems such as wide bandgap, low conjugation degree, and weak photogenerated charge separation, which greatly limit the improvement of hydrogen production performance of polymer photocatalysts. The design of donor acceptor (D-A) and donor π-acceptor (D-π-A) structures has been proven to be an effective strategy for improving the photocatalytic hydrogen evolution performance of organic polymers. This is because there is a strong electron “push-pull” effect between the electron donor (D) and the electron acceptor (A), which promotes the separation of photogenerated charges. In addition to charge separation ability, charge transport ability and visible light absorption ability also significantly affect the photocatalytic hydrogen evolution activity of polymers. Herein, two types of linear conjugated polymers (LCPs) with D-A and D-π-A structures are designed and synthesized using pyrene as the D-type unit, furan with narrow bandgap as the π bridge, and electron withdrawing dibenzothiophene sulfone as the A-type unit. Compared with pyrene dibenzothiophene sulfone polymer (Py-BTDO) with D-A structure, D-π-A-type pyrene furan dibenzothiophene sulfone polymer (Py-F-BTDO) with furan as the π bridge exhibits strong visible light absorption and charge transfer abilities. Therefore, D-π-A-type Py-F-BTDO exhibits higher photocatalytic hydrogen production activity, with a hydrogen production rate of 26.5 mmol•h^-1•g^-1 under UV visible light irradiation, approximately four times that of D-A type Py-BTDO. This work demonstrates that introducing narrow bandgap furan (π bridge) between the donor and acceptor to construct D-π-A structures is an effective strategy for enhancing the photocatalytic activity of LCPs.

Key words: furan, linear organic conjugated polymer, narrow bandgap, photocatalytic hydrogen production, D-π-A structural design

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Shenglin Jin, Changzhi Han, Chong Zhang, Daodao Hu, Ben Yang, Jia-Xing Jiang. Synthesis and Photocatalytic Hydrogen Production Performance of Furan based D-π-A type Linear Conjugated Polymer[J]. Acta Chimica Sinica, 2025, 83(10): 1150-1156.

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Fig. & Tab. 7

Figure 1. The synthetic routes of the furan-based LCPs

Figure 2. (a) FT-IR spectra of the polymer, (b) powder XRD pattern, (c) thermogravimetric analysis curve, scanning electron microscopy images of Py BTDO (d) and Py-F-BTDO (e), contact angle images of Py BTDO (f) and Py-F-BTDO (g)

Figure 3. The (a) UV visible absorption spectra, (b) fluorescence spectra, (c) instantaneous photocurrent spectra and (d) band position spectra of polymers

Figure 4. Dihedral angles of polymers (a) Py-BTDO and (b) Py-F-BTDO

Figure 5. The photocatalytic hydrogen evolution activity of polymer under (a) ultraviolet visible light (λ>300 nm) and (b) visible light (λ>420 nm), (c) UV visible absorption spectra of Py-F-BTDO and stability testing of AQY, (d) Py-F-BTDO under full arc light (λ>300 nm)

Polymer	E_g^a/eV	HER^b/ (mmol•h^-1•g^-1)	HER^c/ (mmol•h^-1•g^-1)
Py-BTDO	2.46	6.52	3.6
Py-F-BTDO	2.13	26.5	17.5

Table 1. Band gap and hydrogen production rate of polymers

Figure 6. (a) The hydrogen evolution activity of Py-F-BTDO produced from different batches under full arc light irradiation (λ>300 nm); (b) photocatalytic hydrogen production rate of different sacrificial agents under UV visible light irradiation

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呋喃基D-π-A型线性共轭聚合物的合成与光催化产氢性能研究

Synthesis and Photocatalytic Hydrogen Production Performance of Furan based D-π-A type Linear Conjugated Polymer

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