MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Chao Li,Juan Lu,Yanjia Guo,Jing Wang,Yujia Song,Ruidan Li,Li Tian,Xuwen Li
In this study, a solid-state electrochemiluminescence (ECL) sensor was developed for ultrasensitive and specific detection of sulfapyridine (SPY) using graphitic carbon nitride (g-C 3 N 4 ) as a luminescent reagent. The sensor was fabricated by sequentially coating composite material g-C 3 N 4 @ZIF-8 and Nafion onto the electrode surface. The g-C 3 N 4 , synthesized through high-temperature pyrolysis of melamine, generated a sensitive ECL signal in K 2 S 2 O 8 solution. And g-C 3 N 4 served as a carrier for ZIF-8, with the latter acting as a co-reaction promoter within the g-C 3 N 4 -K 2 S 2 O 8 system, leading to a significant enhancement of the ECL signal. Additionally, molecularly imprinted polymers (MIPs) with SPY were introduced to further enhance the performance of the sensor by specifically recognizing SPY. Under optimal conditions, the prepared ECL sensor showed sensitive measurement of SPY in the linear range of 5.0 × 10 −13 ∼ 5.0 × 10 −8 mol/L, with a detection limit (LOD) of 1.67 × 10 −13 (S/N = 3). The developed MIP-ECL sensor demonstrated good stability, high sensitivity, and reliable reproducibility, thus making it suitable for detecting SPY in real samples.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Eryu Wang,Yi-Chun Chu,Wenjun Zhang,Yanping Wei,Chuanling Si,Regina Palkovits,Xin-Ping Wu,Zupeng Chen
The co-production of hydrogen and value-added biochemicals from lignocellulose utilizing solar energy has been regarded as one of the technologies most potentially able to alleviate the current energy crisis. Here, we demonstrate a cost-effective photoreforming strategy for lignocellulose valorization using a carbon nitride-supported platinum single-atom photocatalyst. An advanced H 2 evolution rate of 6.34 mmol mol Pt –1 h –1 is achieved over the optimal catalyst, which is around 4.6 and 30.5 times higher compared with the nanosized Pt counterpart and pristine carbon nitride, respectively. Meanwhile, the monosaccharides are oxidized to value-added lactic acid with >99% conversion and extraordinary selectivity up to 97%. The theoretical calculations show that with Pt incorporation, the photogenerated holes are predominantly localized on the metal sites while the photogenerated electrons are concentrated on C 3 N 4 , thus enhancing the effective separation of charge carriers. This work provides a promising avenue for the simultaneous production of green H 2 and bio-based chemicals by biomass photorefinery.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shuting Guo,Qiongfang Zhuo,Gang Huang,Liying Lan,Tongyin Zhu,Wenlong Wang,Zehong Yang,Jiasheng Fang,Yongfu Qiu,Bo Yang
Imidacloprid (IMD) is a kind of neonicotinoid insecticide, which is widely used in the agricultural production. There are few reports on electrocatalytic degradation of IMD with the low concentration. In this study Ti 4 O 7 -C 3 N 4 electrode was employed for the first time to electrocatalytically degrade low concentration IMD. Compared with pure Ti 4 O 7 electrode, the oxygen evolution potential was increased from 1.84 V to 2.50 V, the charge transfer resistance (R ct ) was reduced by 66.05 %, and the oxygen vacancies were increased by 2.5 times compared to the original Ti 4 O 7 . Especially, the R ct for Ti 4 O 7 (5.45 Ω·cm 2 ) was only 1/7 of that for boron-doped diamond (BDD) (38.89 Ω·cm 2 ). IMD degradation ratio was up to 98 % in only 1.256 min (75.360 s) using a Ti 4 O 7 -C 3 N 4 . When SongShan Lake water, Wanjiang water, and secondary effluent were treated, the degradation radios of IMD were 70.30 %, 72.33 % and 81.12 %, respectively. In the presence of Cl − coexisting ions, no disinfection by-product of ClO 4 − was detected, which is an advantage for Ti 4 O 7 -C 3 N 4 compared with BDD. The first and 48th degradation ratios were 99 % and 97 %, respectively, indicating the good stability of Ti 4 O 7 -C 3 N 4 . The development of Ti 4 O 7 -C 3 N 4 provides a stable, low energy consumptions and no secondary pollution anode for the treatment of actual wastewater.
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高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 38
·5440-5451
·
IF 2.6
Xiaoyun Ye,Hangyu Zhong,Yumei Zhang,Xuehua Liu,Wei Tian,Li-An Ma,Qianting Wang
Previous studies on photocatalytic technology have shown that doping co-catalysts and constructing composite heterojunctions are effective strategies for improving the photocatalyst performance. The Ti3C2/SrTiO3/g-C3N4 composite photocatalyst with a gradient heterostructure was prepared by the high-temperature calcination method with Ti3C2 as the co-catalyst. The effects of g-C3N4 content on the microstructure and hydrogen evolution rate of the Ti3C2/SrTiO3/g-C3N4 composites were investigated under simulated sunlight. The results showed that the photocatalyst with 60 wt% of g-C3N4 had the optimal hydrogen evolution rate of 1733.13 μmol g−1 h−1 after simulated sunlight irradiation for 4 h, which was approximately 3.3 times higher than that of Ti3C2/SrTiO3. After four photocatalytic hydrogen evolution cycles, no significant decrease in the hydrogen evolution rate of the Ti3C2/SrTiO3/g-C3N4 composite was observed. This work may serve as a rational reference on the synergistic effect of heterostructures and cocatalysts to improve the separation effect of electron–hole pairs, thus improving the hydrogen evolution effect of the catalyst.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Haohuan Yuan,Wenting Xiao,Xin Zhang,Jiao Bao,Wei Li,Bo Huang,Guannan He
Efficient carrier separation and high electron migration efficiency are essential for sustainable H 2 energy production via photocatalysis . In this work, a Mn 0.5 Cd 0.5 S/Ti 3 C 2 MXene/g-C 3 N 4 all-solid-state Z-scheme photocatalyst is constructed by a series of processes, including low temperature calcination , etching, ultrasonication and solvothermal process. The appropriate energy band structures of g-C 3 N 4 and Mn 0.5 Cd 0.5 S enable the formation of the Z-scheme system, achieving efficient carrier separation. The Ti 3 C 2 MXene flakes assembled between g-C 3 N 4 nanosheets and Mn 0.5 Cd 0.5 S particles can accelerate the charge migration rate in the system. The optimized ternary composite exhibits the highest hydrogen evolution rate (HER) of 13.7 mmol g −1 h −1 , which is much higher than that of the pure g-C 3 N 4 and Mn 0.5 Cd 0.5 S. Meanwhile, the apparent quantum yield (AQY) value of the composite at 420 nm reaches up to 24.07 % and exhibits high stability. Based on the characterization, the photocatalytic mechanism of carrier transfer in the Z-scheme heterojunction is also revealed. The finding of this article provides insights into the high efficiency of carrier transfer and separation in the photocatalytic reactions.
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高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Shasha Wang,Yuli Wei,Rongzhe Wang,Qing Liu,Qing Wang,Shaohua Luo,Yahui Zhang,Shengxue Yan,Pengqing Hou,Xin Liu,Jing Guo,Wenning Mu
Nitrogen-doped carbon is regarded as a promising anode for potassium ion batteries (PIBs) because nitrogen atoms can regulate the structures of carbon and generate abundant active sites. How to improve the nitrogen content in carbon through simple and effective methods remains to be further addressed. In this paper, a carbon material (60NC) with ultrahigh nitrogen content (16 %) was prepared from graphite phase carbon nitride (g-C 3 N 4 ) by a convenient freeze-drying and high-temperature pyrolysis method, assisted by citric acid. When used as an anode for PIBs, 60NC exhibited a superior reversible capacity of 318.1 mAh g −1 after 200 cycles at 0.1 A g −1 . Even at the high current density of 1A g −1 , 60NC maintained a specific capacity of 261.8 mAh g −1 after 1000 cycles. The excellent electrochemical performance of 60NC mainly stems from its abundant K + storage active sites caused by nitrogen doping, large layer spacing, and hierarchical porous structure.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Hanyu Liu,Haoxu Ma,Junlong Liu,Zhuo Yu,Shangru Tang,Jiabin Sun,Sibo Wu,Lizhi Wang,Hongbo Xiao,Wenlei Wang,Ting Yang
Photocatalysis technology has been considered a green and efficient method to control tetracycline hydrochloride (TCH) pollution in potable water sources. In this paper, Bi 2 WO 6 -loaded photocatalysts on nitrogen-defective C 3 N 4 (BWO@ND-C 3 N 4 ) were constructed to synergistically promote the degradation of TCH under visible light by activating periodate (PI). TCH (20 mg/L) could be 100 % photo-degraded by BWO@ND-C 3 N 4 (0.25 g/L) within 30 min when PI concentration is 1 mM. The BWO@ND-C 3 N 4 /activated PI system can also complete total TCH degradation when applied to actual water bodies and sunlight particularly (40 min for sunny days and 60 min for cloudy days). Besides, the system displayed good recycling stability under visible light, maintaining 90 % TCH degradation efficiency after 6 cycles. The degradation mechanism research showed that ·IO 3 , h + , ·OH, ·O 2 – and 1 O 2 are the main active substances in the degradation process. The superior TCH degradation performances of BWO@ND-C 3 N 4 can be ascribed to the interfacial C-O bonds and the stable built-in electric field between BWO and ND-C 3 N 4 for the fast separation of photogenerated carriers and activating PI, which can facilitate the rapid electron transfer, enhancing the TCH degradation kinetics. This work provides a broad application prospect of photocatalyst/activated PI systems for antibiotic pollution treatment in water.
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高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 49
·495704
·
IF 2.9
Gang Xiao,Zishuai Wang,Yu Jin,Fengping Wang
The selective cleavage of lignin C–C bonds is a highly sought-after process with the goal of obtaining low-molecular-weight aromatic chemicals from renewable resources. However, it remains a challenging task to achieve under mild conditions. Photocatalysis is a potentially promising approach to address this issue, but the development of efficient photocatalysts is still in progress. In this study, we introduce the heterostructured TiO2@g-C3N4 photocatalyst for the development of a visible light photocatalytic procedure for the selective cleavage of lignin C–C bonds under mild conditions. The photocatalyst displays favourable visible light absorption, efficient charge separation efficiency, and promising reusability. A typical β–O–4 dimer model, 2-phenoxy-1-phenylethanol, was effectively (96.0% conversion) and selectively (95.0 selectivity) cleaved under visible light at ambient conditions. This photocatalytic procedure was also effective when subjected to solar irradiation or other lignin dimer models with β–O–4 or β-1 linkages. This reaction occurred through a Cβ-centred radical intermediate and a six-membered transition state with photogenerated holes as the primary active species. The Cα–OH oxidative dehydrogenation of the substrate could also take place but was a relatively minor route. This study provides a new photocatalytic procedure for visible-light-driven lignin valorisation and sheds light on the design of high-performance nanocomposite photocatalysts for C–C bond cleavage.
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PubMed
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Zheng Zhou,Meng Miao,Wenzhi Li,Jingting Jin,Liqun Wang,Lulu Zhang,Liang Yuan
The selective conversion of methane is a significant but difficult challenge. We reported a CuFe bimetallic catalyst supported by g-C 3 N 4 for the catalytic oxidation of methane to oxygenated C1 products. Using H 2 O 2 as the oxidant, Cu 0.4 Fe 0.3 -C 3 N 4 catalyst had a C1 yield of 8231 μmol·g cat −1 · h −1 at 70 °C, and 1 H NMR results showed that almost all of the liquid phase products were target C1 products. The methanol selectivity on CuFe-C 3 N 4 was 44.5 %, comparing with 20.2 % methanol selectivity on Cu-C 3 N 4 . The formation of a Cu-O-Fe site on the CuFe-C 3 N 4 was confirmed by in situ DRIFTS and 57 Fe Mössbauer spectroscopy. This Cu-O-Fe site was responsible for the improved catalyst performance. DFT calculations illustrated that at the Cu-O-Fe site, H 2 O 2 dissociated into two ·OH radicals instead of ·H and ·OOH radicals as it did at the Cu-O-Cu site. The ·OH radicals combined with the ·CH 3 radicals from the CH 4 molecules to form methanol. These findings provided valuable insights into the rational design of active sites on carbon nitride materials.
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高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 48
·e202400718
·
IF 1.9
Qingbo Yu,Yuqi Li,Qingping Wang,Naishen Shi,Fan Liu,Zishe Xu
Graphical The fly ash was treated with Ca(OH) 2 lead to a more complex surface structure. It can regulate the polymerization reaction of dicyandiamide, leading to the formation of the CaFA-CN catalyst with more amino groups and fewer carbon–nitrogen heterocycles. The photocatalytic activity of the obtained CaFA-CN is 4.03 times higher than that of the original g-C 3 N 4 . Regulating the polymerization of graphitic carbon nitride (g-C 3 N 4 ) precursor is regarded as a desirable pathway to boost its photocatalytic activity. However, the current has been seldomly concerned in adjusting the polymerization of g-C 3 N 4 precursor based on the structural characteristics of fly ash (FA). This study manipulates the polymerization reaction of dicyandiamide through alkali treatment of fly ash (KOH-FA, CaOH-FA and NaOH-FA), yielding three g-C 3 N 4 -based composite photocatalysts (CaFA-CN, KFA-CN, and NaFA-CN) with varying degrees of polymerization. Compared to the zeolite structures of fly ash treated with potassium hydroxide (KOH) and sodium hydroxide (NaOH), the fly ash treated with calcium hydroxide (Ca(OH) 2 ) developed calcium silicate hydrate, leading to a more complex surface structure. Isotherm adsorption model analysis revealed that Ca(OH) 2 -FA's adsorption of methylene blue fits the Freundlich model, indicating uneven distribution of active sites. This unevenness results in an uneven collision probability during the high-temperature polymerization of dicyandiamide, leading to incomplete polymerization and the formation of the CaFA-CN catalyst with more amino groups and fewer carbon-nitrogen heterocycles. This incomplete polymerization enabled CaFA-CN to achieve a 55.3% degradation efficiency of methylene blue within 60 minutes. The photocatalytic activity of CaFA-CN is 4.03 times that of the original g-C 3 N 4 (19.4%).
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 47
·e56261
·
IF 2.7
Jiayu Lin,Yongbo Hou,Lailong Ding,Yifan Wang,Jinhu Hu,Xishun Qiu,Chao Wu,Mingliang Ma,Wei Gao
Metal–organic frameworks (MOFs) have garnered significant attention in recent years due to their potential application in flame-retardant polymeric materials. In this work, Fe 2 O 3 /ZnFe 2 O 4 /g-C 3 N 4 @ZIF-8 flame retardants were synthesized via solvothermal and calcination techniques, and their elemental composition and morphologies were thoroughly characterized. The flame retardancy of polyurea (PUA) composites incorporating varying dosages of these flame retardants was evaluated using cone calorimetry tests (CCT). The findings demonstrate that the incorporation of Fe 2 O 3 /ZnFe 2 O 4 /g-C 3 N 4 @ZIF-8 significantly enhanced the flame retardant properties of PUA composites. With the addition of 3 wt% of the flame retardant, the peak heat release rate (PHRR), total heat release (THR), total smoke production (TSP), and total CO yield (TCO) of the PUA composites decreased to 890.82 kW/m 2 , 131.34 MJ/m 2 , 12.30 m 2 , and 2.39 g, respectively, reflecting reductions of 33.59%, 18.59%, 29.40%, and 47.93% compared with pure PUA. The flame-retardant mechanism was systematically analyzed in both the condensed and gas phases. This study provides a robust experimental foundation and novel insights that contribute to the development of advanced flame-retardant coating materials.
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高影响因子
ELECTROANALYSIS
·
2025
·Vol. 37
·期 7
·e70023
·
IF 2.3
Dongxue Sun,Shijie Chen,Jinlong Li,Guozhe Sui,Dongxuan Guo,Ning Liu,Renjiang Lv,Shuang Sui
In this study, ZnO/ZnS/g-C 3 N 4 composite materials were successfully synthesized via a combination of hydrothermal treatment and calcination for the electrochemical detection of ascorbic acid (AA). A systematic experimental design was implemented to evaluate the influence of key parameters, including the amount of ZnS added, the loading ratio of ZnO/ZnS onto g-C 3 N 4 , and the pH conditions during detection, on sensor performance. Comprehensive material characterization was conducted using scanning electron microscopy transmission electron microscopy X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy, providing detailed insights into the composites’ microstructure, crystallinity, elemental composition, and chemical bonding. The sensor exhibited excellent performance for AA detection, with a broad linear detection range of 20–5000 μM, a low detection limit of 1.2 μmol/L (S/N = 3), and high recovery rates between 98.23% and 105.02%, accompanied by low relative standard deviations (1.56–3.12%). Furthermore, application of the sensor in cyclic voltammetry analysis of commercial vitamin C tablets yielded accurate and reliable results, confirming its strong stability, anti-interference capacity, and reproducibility.
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高影响因子
危险品化学品经营许可证（带存储）