JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Zhouzhou Li,Zheng Li,Feng He,Wen He,Qixu Chen,Hongqing Wang
Recently, how to improve the photocatalytic uranium removal performance of Graphite-phase carbon nitride (GCN) has always been a hot research topic. In this paper, a new strategy based on p-n junction and D-A structure is proposed to improve the photocatalytic performance. And as a result, a novel cyano modified photocatalytic material NC-GCN/Ag 2 O was designed and prepared for the reduction of U(VI). Interestingly, the material shows better adsorption performance for U(VI) in the dark treatment stage, and its removal of U(VI) is close to 70 % under the initial U(VI) concentration of 20 ppm and the solid–liquid ratio of 0.2 g/L. And the adsorption is in accordance with the Langmuir model and Pseudo second order model. After 30 min of illumination, the removal rate of U(VI) can reach 93.2 %, significantly higher than that of GCN (13.6 %) and NC-GCN 10 (37.7 %). It’s worth mentioning that photocatalytic reduction dominated the adsorption-reduction process for U(VI) removal after light exposure. In addition, after four cycles, the removal of U(VI) from the composite material decreased by only 5 % with no change in the crystal structure, i.e., it has good reusability and stability. Meanwhile, there was no significant interference with other ions except for Cu 2+ and V 5+ , which had a weak interference. Finally, a new mechanism for U(Ⅵ) reduction was proposed.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Chengwei Lu,Jun Han,Najun Li,Dongyun Chen,Qingfeng Xu,Hua Li,Jianmei Lu
Photocatalysis is a green and environmentally friendly method for degrading dangerous and nonbiodegradable pollutants. In this study, a sequence of metal-free triazine-based electronic donor–acceptor (D-A) conjugated polymers Tr-X (X = Th, BT, BTh) were prepared by D-A configuration regulation between triazine (Tr) and monomers containing N and S, such as thiophene (Th), bithiophene (BTh) and benzothiadiazole (BT) units, for the photocatalytic degradation of bisphenol A (BPA) and benzene contaminants in water under visible light. Among these, Tr-BTh exhibited complete photocatalytic degradation owing to its excellent D-A configuration. Moreover, the N and S atoms, which are rich in triazine and thiophene units, serve as highly dispersed reactive sites. The separation and transfer of photogenerated carriers can be further improved by expanding the light-absorption range of polymers. In addition, the polymers showed good adsorption for BPA and other aromatic organic pollutants through π-π interaction and surface hydrogen bonding, which provides a facile strategy for efficient polymer-based photocatalysts for water purification.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Can Lang,Hao Gong,Gang Ye,Pachaiyappan Murugan,Zheng-Hui Xie,Yi-Fan Dai,Kai Yang,Changlin Yu,Shi-Yong Liu
Conjugated microporous polymers (CMPs), featured by broad tunability in molecule design, structure and properties, have been widely used as photocatalysts for water splitting to produce hydrogen. However, the conventional donor–acceptor (D-A) binary CMPs have not achieved satisfactory performance so far. In this contribution, a series of D 1 -D 2 -A ternary CMPs are synthesized by the atom-economical direct C H arylation polymerization (DArP), wherein the dibenzo[ b , d ]thiophene-S,S-dioxide (BTDO), tetraphenylethylene (TPE) and 3,4-ethylenedioxythiophene (EDOT) units serve as the acceptor (A), donor D 1 and donor D 2 , respectively. The structure–property correlations of the CMPs are systematically investigated by optical, electrochemical, water contact angle, and hydrogen production performance tests, revealing that the ternary D 1 -D 2 -A CMPs can maximize hydrophilicity and charge separation through the synergistic effect of BTDO, EDOT, and TPE building blocks. As a result, the ternary CMP-3 with an optimal D/A ratio achieves the highest photocatalytic hydrogen evolution rate up to 81.4 mmol g −1 h −1 without the aid of Pt co-catalyst, which has a 26-fold and 101-fold improvement compared to the pristine D 1 -A and D 1 -D 2 binary CMPs, respectively. Meanwhile, a high apparent quantum yield of 11.1 % at 500 nm is successfully achieved. Density functional theory calculation discloses that D 1 -D 2 -A ternary CMPs possess the desirable molecular geometry and superior charge separation. This work provides a new design and synthetic strategy for the high-performance CMP-based photocatalysts.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
Polymers
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2023
·Vol. 15
·期 10
·2274
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IF 5
Zipeng He,Binhua Mei,Hongmei Chu,Yanjun Hou,Haijun Niu
In this study, six conjugated oligomers containing D–A structures were synthesized using the Stille coupling reaction and named PHZ1–PHZ6. All the oligomers utilized demonstrated excellent solubilities in common solvents and notable color variations in the domain of electrochromic characteristics. By designing and synthesizing two electron-donating groups modified with alkyl side chains and a common aromatic electron-donating group, as well as cross-binding them with two electron-withdrawing groups with lower molecular weights, the six oligomers presented good color-rendering efficiencies, among which PHZ4 presented the best color-rendering efficiency (283 cm2·C−1). The products also demonstrated excellent electrochemical switching-response times. PHZ5 presented the fastest coloring time (0.7 s), PHZ3 and PHZ6 presented the fastest bleaching times (2.1 s). Following 400 s of cycling activity, all the oligomers under study showed good working stabilities. Moreover, three kinds of photodetectors based on conducting oligomers were prepared, and the experimental results show that the three photodetectors have better specific detection performances and gains. These characteristics indicate that oligomers containing D–A structures are suitable for use as electrochromic and photodetector materials in the research.
研究领域:
材料科学
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有机电子学
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DOI
PubMed
高影响因子
ACS Catalysis
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2024
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IF 11.3
Jiayu An,Wenjun Jiang,Fuwei Zhuang,Yinhua Ma,Su Zhan,Feng Zhou
Utilizing photocatalytic technology to achieve efficient production of H2O2 is a hot topic. Here, we synthesized a photocatalytic material with a strong built-in electric field, namely, Pym-CN, through a hydrothermal-assisted thermal polymerization strategy, which effectively promotes the separation and transfer of photoinduced charge carriers. A pyrimidine ring was successfully introduced into the heptazine structure unit of Pym-CN, which leads to electron aggregation at N═C–N, benefiting for enhancing the strong sorption and activation capabilities of oxygen. Under the condition of visible light wavelength greater than 400 nm (λ > 400 nm), the H2O2 production rate of Pym-CN (2622.5 μmol/L/h) is 7.6 times that of the BCN. A detailed investigation of the reaction mechanism revealed that Pym-CN follows a two-step continuous process of single-electron oxygen reduction reaction (ORR). This work elucidates the application prospects of the donor–acceptor (D–A) structure with a strong built-in electric field in the field of efficient photocatalytic production of H2O2.
研究领域:
材料科学
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光催化
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可再生能源
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化学工程
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2019
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IF 3.218
Huan Ling,Xiaowen Wu,Ke Li,Fengyu Su,Yanqing Tian,Dan Luo,Yan Jun Liu,Xiao Wei Sun
Electrochromic (EC) devices with reversible transmittance switching have promising prospects in the applications of photoelectric displays. Herein, a novel air-stable and high contrast solution-phase electrochromic device based on new viologen derivative (DPB) with A-D-A structure (A: acceptor; D: donor) was demonstrated. Devices possessed simple configuration of ITO/EC solution/ITO. Ferrocene and polycarbonate (PC) were selected as the complementary material and solvent, respectively. All of the fabrications and performance testing work were conducted in normal air condition. The DPB-based device showed deep magenta color in colored state and exhibited high optical contrast of ΔT of 72.2% (517 nm) and good coloration efficiency of 102.2 cm 2 /C at 1.8 V. The device appeared only slight degradation of ΔT (ΔT = 69.6% or retained 96.7% of its initial ΔT after 5000 s constant switching) under the normal air atmosphere, which was even better than some reported well-packaged viologen-based solution ECDs. Additionally, the UV–vis reflective spectra were also conducted to assess the reflectance property of the devices. The reflectance peak (ΔR = 2.6%) and absorption peak matched accurately, which indicated that the new viologen derivative possesses the potential application in reflective electrochromic devices.
研究领域:
材料科学
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电化学
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光电
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Fengping Yang,Dengsheng Zheng,Libin Zhang,Jiamin Yuan,Liliang Wang,Min Long,Yanzhen Yin,Ke Sun,Cong Liu,Hongxiang Zhu,Tao Liu
The emergence of antibiotic-resistant superbugs has heightened concerns about environmental pollutants such as tetracycline hydrochloride, necessitating effective removal strategies. Among various treatment approaches, interfacial modification means to realize efficient pollutant removal is an ideal method. In this study, a breakthrough in photocatalytic technology was achieved by developing a novel material that combines excellent adsorption capacity with enhanced photocatalytic performance. The innovation lies in our pioneering implementation of a third-component doping strategy, which enabled the construction of an organic semiconductor intrinsic heterojunction photocatalytic layer with an A-D-A structure, integrated onto a natural biomass carbon substrate. This strategic integration creates a synergistic system wherein the natural biomass carbon component rapidly concentrates pollutants, while the organic semiconductor bulk heterojunction photocatalytic layer generates electrons and free radicals for degradation. The material's exceptional performance is evidenced by its ability to completely degrade 20 mg/L of tetracycline hydrochloride within 30 min, establishing a new benchmark in treatment efficiency. Through density-functional theory (DFT) analysis, we have elucidated the underlying degradation mechanism, providing theoretical insights that may facilitate the development of advanced treatment solutions for a broader spectrum of organic pollutants through adsorption photocatalysis.
研究领域:
环境科学
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材料科学
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光催化
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纳米技术
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化学工程
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水处理技术
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理论化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）