JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Jia Huang,Yunjie Zou,Lan Ling
Perfluorooctanoic acid (PFOA) is detected widely in surface and groundwater globally. Its removal poses a significant challenge due to its high chemical stability. This study demonstrates efficient PFOA degradation using poly-triazine-imides-tailored defective Bi 5 O 7 I (PTI/BB). Under 300 W Xe irradiation, 1 µg·L −1 PFOA could be degraded to 9.86 ng·L −1 after 3 h in the presence of 0.5 g·L −1 25 % PTI/BB. The mechanism investigation reveals that the oxygen vacancy (OV) in partially reduced Bi/Bi 5 O 7 I (BB) generates impurity states, enhancing the light-harvesting capacity. Furthermore, forming a type Ⅱ heterojunction between conjugated PTI and BB facilitates the efficient separation of photogenerated carriers. The resulting photogenerated electrons (reduction) and holes (oxidation) drive hydrogenation reduction and oxidative decarboxylation of PFOA, respectively. This synergistic effect consequently achieves significant defluorination of PFOA. The proposed PFOA degradation pathway via the PTI/BB catalyst offers new insights into the catalyst design for photocatalytic degradation of per- and polyfluoroalkyl substances (PFAS).
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY LETTERS
·
2024
·Vol. 53
·期 5
·
IF 1.4
Yu Gege,Zhao Yubao
Poly(triazine imide) synthesized by the molten salt route with incorporation of Li+ and Cl‒ ions (PTI/Li+Cl−) was prepared by rational controlling of the washing extent. The surface transformation of the phase-pure PTI framework incurred by thorough washing has been confirmed by a systematic analysis based on x-ray diffraction, Ultraviolet Raman, atomic force microscope, and x-ray photoelectron spectroscopy measurements. Uranyl ion adsorption experiments further support the surface structural transformation from triazine-unit PTI to heptazine-based graphitic carbon nitride. Efforts on the exploration of PTI material application should be mainly directed toward the waterless fields to give good repeatability.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Linhai Yang,Xuechang Ren,Yujie Zhang,Zuoyan Chen
A novel poly(triazine imide) (PTI)with intercalation of Cu ion heterogeneous catalysts (Cu/PTI) was synthesized by one-pot thermal condensation of melamine and copper acetate as precursors, resulting in a material with stoichiometry of C 6 N 8.7 Cu. The microscopic morphology and structural characteristics of Cu/PTI were characterized by XRD, SEM, TEM, FT-IR, and XPS. The characterization results corroborated the highly condensed triazine-based structure, and copper mainly existed in the form of Cu + . The possible formation mechanism of composite materials was proposed. The prepared composite Cu/PTI catalyst was used to activate PMS to enhance the simulated pollutant RhB degradation under sunlight irradiation. The experimental results show that sunlight could improve the activation efficiency of Cu/PTI to PMS, Cu/PTI(1:4) had the best activation ability, and the degradation rate of RhB reached 96.2% in 60 min, nearly doubling that without sunlight. Critical impacting factors, initial solution pH was investigated in terms of the catalytic efficiency. The catalyst has a high ability to activate PMS to degrade pollutants in the range of pH = 3–10. In addition, quencher experiments demonstrated that O 2 · - , 1 O 2 , h V B + , and S O 4 · - are the main active species, and a detailed catalytic mechanism was proposed. Thus, the enhanced reactivity of the Cu/PTI catalyst was attributed to the existence of dual catalytic sites and the synergistic effect between Cu and PTI. This strategy provides a feasible way to treat wastewater using Cu/PTI with PMS under sunlight.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Yao Jiang,Dongdong Zheng,Kang Wang,Mingming Xu,Qi Wang,Peng Cui,Lin-Bing Sun
Porous polymer networks are considered potential candidates for CO2 capture, owing to their well-developed porosity and high stability. However, their further application is limited by the relatively low selectivity and unsatisfactory adsorption capacity. In this study, we fabricated a nitrogen-rich porous polymer network, denoted as NRPPN-1, with dense polytriazine and polytetrazine by polymerization of two monomers of melamine and 3,6-dichloro-1,2,4,5-tetrazine. The resulting NRPPN-1 exhibits an abundance of micropores and a high surface area of 668 m2·g–1. Experimental results demonstrate that NRPPN-1 has excellent CO2 adsorption capacity (181.2 mg·g–1) and adsorption selectivity (306.4) at 273 K and 100 kPa for CO2/N2 mixtures, which are corroborated by adsorption potential and breakthrough curve analysis. Moreover, computational simulations reveal that the abundant nitrogen-rich active sites in NRPPN-1 induce strong C···N interactions, which are responsible for the promoted selective capture of CO2 from CO2/N2 mixtures. The novel nitrogen-rich porous polymer network may serve as a promising candidate for the capture of CO2 from flue gas.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2015
·Vol. 53
·期 18
·2132-2140
·
IF 3.113
Chao Liu,Hongxia Yan,Lingxia Yuan,Zhengyan Chen,Mengmeng Zhang
In this article, cyanuric chloride (CC) and hexamethylenediamine (HMD) as raw material, the grafting of hyperbranched polytriazine onto reduced graphene oxide surface (HBP-RGO) was achieved by the repeated nucleophilic substitution between chlorine groups of CC and amino groups of HMD, respectively. The Fourier transform infrared, X-ray photoelectron spectroscopic, Raman, transmission electron microscopic, thermogravimetric, and atomic force microscopic analysis showed that HBP-RGO had been successfully prepared and the HBP had a dendritic structure on the surface of RGO. And then, the HBP-RGO was added into polystyrene (PS) and the HBP-RGO/PS composite was prepared by solution mixing. The micro-morphology, thermal stability, and electrical conductivity of RGO/PS and HBP-RGO/PS composites were characterized and compared. The scanning electron microscopic analysis showed that the HBP-RGO can uniformly disperse in PS. Meanwhile, the HBP-RGO/PS composite showed good thermal stability and electrical conductivity, the percolation threshold of the composites is low as 0.32 vol %. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015 , 53 , 2132–2140
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 58
·46632-46639
·
IF 3.84
Chao Liu,Hongxia Yan,Zhengyan Chen,Lingxia Yuan,Qing Lv
Surface-functionalized reduced graphene oxide sheets were obtained by grafting hyperbranched polytriazine (HBPT) onto the surface of reduced graphene oxide (RGO) sheets. The HBPT was prepared through repeating nucleophilic substitution between chloride ions of cyanuric chloride and amino groups of hexamethylenediamine. The hyperbranched polytriazine modified reduced graphene oxide (HBPT-RGO) was then added as the nanofiller and polyamine curing agent in diallyl bisphenol A modified bismaleimide resin (BMI-BA) to fabricate in situ the HBPT-RGO/BMI-BA nanocomposite. The characterization results showed that suitable addition of HBPT-RGO could greatly enhance the mechanical properties and decrease the frictional coefficient and wear rate of the BMI-BA resin dramatically, which might be related to the good compatibility and interfacial adhesion between HBPT-RGO and the BMI-BA matrix.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Yali Niu,Rui Yao,Shuhui Fan,Jinping Li,Guang Liu
Anion-exchange membrane water electrolyzers (AEMWE) are promising for clean hydrogen production. However, the high energy barriers associated with water adsorption and dissociation combined with the high adsorption energy of hydrogen intermediates (H*) in alkaline environment result in slow kinetics for the hydrogen evolution reaction (HER). To tackle this, we report a catalyst comprising Pt nanoparticles loaded on Co(OH) 2 /PTI nanosheets (Pt/Co(OH) 2 /PTI) for efficient alkaline HER at high current densities. Operando characterization indicates that Co(OH) 2 promotes H 2 O adsorption and dissociation, while the Pt nanoparticles optimize H* adsorption energy, enabling preferential H* adsorption at the Pt site to facilitate H 2 generation and desorption. Furthermore, the ultra-thin poly (triazine imide) (PTI) support prevents the Pt nanoparticles aggregation, thereby enhancing catalyst stability. As a result, the synergistic Pt/Co(OH) 2 /PTI achieves superior HER performance, demanding an overpotential of merely 7 mV to achieve a current density of 10 mA cm −2 and just 220 mV to drive 1 A cm −2 , and it maintains stable for over 220 h under the condition of 1 A cm −2 . Additionally, the electrolyzer assembled using Pt/Co(OH) 2 /PTI as the cathode demonstrates stable operation for 200 h at 0.5 A cm −2 under 70 °C, highlighting its strong potential for industrial applications.
研究领域:
电催化
·
能源化学
·
材料科学
·
纳米催化
·
氢能技术
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Chongkun Zhao,Feng He,Jingjuan Yi,Qixu Chen,Wen He,Haiyan Jiang,Hongqing Wang
Photocatalytic immobilization of U(VI) is an effective means of separating and removing uranium from water bodies. Improving photocatalytic performance is currently a hot topic in photocatalytic research. In light of this, this study proposes a novel strategy based on synergistic polarization-crystallinity modulation and interlayer bridging in poly heptazine imide (PHI) to achieve efficient U(VI) removal. The obtained potassium poly heptazine imide (PHI-K) exhibits rewarding piezo-photocatalytic performance, removing 98.4 % of U(VI) within 30 min. Experimental results demonstrate that high crystallinity, piezoelectric electric fields, and K + ion intercalation effectively facilitate carrier separation, thereby enhancing photocatalytic activity. Characterization and density functional theory calculation further reveal enhanced piezoelectric properties induced by K + ion polarization. In addition, the material exhibits excellent stability and resistance to ionic interference. Finally, a potential U(VI) removal technique is proposed. This work is anticipated to present a promising alternative for piezo-photocatalytic U(VI) removal.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Song Xiang,Shiquan Wang,Ganbing Zhang,Muhammad Sultan Irshad,Zhijun Ma,Ming Li
A conjugated microporous polymer (CMP) combining triazine and bithiophene units in the same framework is synthesized by a facile solvent-free one-pot method and employed as an anode material for lithium/sodium-ion batteries (LIBs/SIBs). It exhibits a large rate capability with a high reversible capacity for LIBs after activation, e.g ., 1014 mAh g −1 at 0.1 A g −1 and 486 mAh g −1 at a current density of 5 A g −1 with outstanding cycling stability. Meanwhile, it delivers perfect electrochemical properties for SIBs, featuring high reversible specific capacities of 425/260/156 mAh g −1 at 0.1/1/5 A g −1 . Especially, the CMP even outstrips most crystalline covalent organic frameworks (COFs) as SIB anodes at high current density. The lithium and sodium storage mechanisms of the CMP structural unit involve 11-electron redox reactions with four and three-step structure evolutions respectively, as follows from density functional theory calculations. The reported study demonstrates the CMP with redox-active electron donating units via triazine bonding as a promising electrode material for next-generation green sustainable energy storage devices.
研究领域:
材料科学
·
能源存储
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2024
·
IF 4.4
Jianhua Liu,Jiashu Li,Fangshu Xing,Jian Liu
Developing biological cofactor regeneration strategies is crucial for photo-enzyme coupling systems. Here, crystalline poly(triazine imide) (PTI) containing the cyano group (–CN) is designed for photocatalytic nicotinamide cofactor oxidation regeneration via π–π interaction. The π-conjugation degree and electron delocalization of PTI can be regulated through –CN modification. Such a unique extended π-conjugated system promotes the adsorption of the reduced-state nicotinamide cofactor (NADH) on the aromatic skeleton. Moreover, the enhanced charge transfer dynamics expedite the formation of intermediate active species. Accordingly, the optimized conversion rate of NADH to NAD+ reached 98.2% within 60 min. In contrast, pristine PTI and amorphous polymeric carbon nitride (PCN) gave oxidation yields of 88.1% and 56.8%, respectively. The exclusive selectivity of the oxidized product was further verified by the enzymatic method and nuclear magnetic resonance characterization. This study introduces an innovative method for modulating non-covalent interactions for photo-enzymatic catalysis via the extended π-conjugated system.
研究领域:
材料科学
·
光化学
·
生物催化
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Miaoling Chen,Yu Chen,Zhengyuan Zhou,Purui Lin,Minhua Su,Jiacheng Min,Kaimin Shih,Ying Zhou
Radioactive strontium (Sr 2+ ) and cobalt (Co 2+ ) in nuclear wastewater pose significant environmental risks, leading the need of developing effective remediation strategies. In this study, a poly (triazine imide) (PTI) composite intercalated with bromide (Br − ), referred to as PTI/LiBr, synthesized via a molten salt method, is introduced as a novel adsorbent for the removals of Sr 2+ and Co 2+ . PTI/LiBr composite exhibited rapid adsorption and high efficiency for both radionuclides, driven by electrostatic interactions and partial exchange of Li + ions. The removal efficiency for Sr 2+ and Co 2+ exceeded 95 % within 30 min. Adsorption kinetics followed a pseudo-second-order model, while isotherm analysis indicated that Sr 2+ adsorption aligned with the Freundlich model and Co 2+ adsorption followed the Langmuir model. The adsorption process was confirmed to be spontaneous and endothermic. The γ-radiation tolerance tests verified the structural stability and high adsorption efficiency of the material under ionizing radiation conditions. Additionally, DFT-based wave function and charge density analyses showed a stronger and more stable interaction between PTI/LiBr and Co 2+ compared to Sr 2+ , which might be driven by favorable magnetic interactions and significant charge transfer. This study highlights the potential of PTI/LiBr as a robust and efficient adsorbent for mitigating radioactive pollutants in complex aqueous environments.
研究领域:
环境科学
·
材料科学
·
核废物处理
·
吸附技术
·
化学工程
·
放射化学
·
水污染控制
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）