MATERIALS SCIENCE FORUM
·
2020
·
IF 0
Yu Quan Ren,Shi Yong Sun,Edward Opong Acheampong,Fa Qin Dong,Biao Biao Ma,Ke Wang,Xiao Yu Fan
A one-step synthesis of visible light responsive diatomite/g-C3N4 composite material was prepared by impregnation-calcination method. The products were characterized by Scanning electron microscope, X-ray diffractometer, Ultraviolet diffuse reflectance spectroscopy, Fourier transform infrared spectrometer, and Photoluminescence spectrometer. The SEM results showed that g-C3N4 was successfully attached onto the surface of the diatomite. Also the composite materials were more light-responsive compared with the single phase material. The composite materials had a maximum degradation efficiency up to nearly 91.79%. The significant improvement in photocatalytic performance was due to the porous structure of diatomite, increase of contact area of carbon nitride.
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Ning Li,Yu Tian,Jianhui Zhao,Jun Zhang,Wei Zuo,Lingchao Kong,Hao Cui
In this study, a newly-designed Z-scheme g-C 3 N 4 @ZnO heterostructure was synthesized by 3D ZnO controllable deposition on 2D g-C 3 N 4 nanosheets using thermal atomic layer deposition. The activity of 2D/3D g-C 3 N 4 @ZnO was evaluated by photocatalytic degradation of cephalexin under simulated sunlight. Results showed that the g-C 3 N 4 @ZnO photocatalyst achieved 98.9% degradation and 72.8% mineralization of cephalexin within 60 min of illumination. This degradation process fitted to the pseudo first order dynamic model with reaction rate constant of 0.0735 min −1 , 5.4 and 8.1 times higher than that of pure g-C 3 N 4 and ZnO, respectively. Consecutive degradation experiments revealed the excellent stability and recyclability of 2D/3D g-C 3 N 4 @ZnO photocatalyst. Mechanism exploration found the enhanced photocatalytic activity was mainly ascribed to the strong oxidizability of active species generated on Z-scheme g-C 3 N 4 @ZnO. Besides, the oxidative species, especially h + and · OH played significant roles in the degradation process. Moreover, the degradation intermediates were identified through HPLC/MS/MS analysis and the possible pathway of cephalexin decomposition was proposed accordingly. The Z-scheme 2D/3D g-C 3 N 4 @ZnO was also proved effective for contaminants removal in real sewage. This study provided a new platform for controllable creation of Z-scheme photocatalysts with broad application prospects in contaminants remediation from aquatic environment under solar light.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Jing Liu,Jie Li,Sen He,Lei Sun,Xiangjuan Yuan,Dongsheng Xia
Various amounts of copper oxide (CuO) modified graphitic carbon nitride (g-C 3 N 4 ) denoted as CuO-CN x composites were successfully fabricated via a reflux condensation method and used as efficient ozonation catalysts for oxalic acid (OA) degradation in aqueous solution. The BET, FT-IR, HRSEM, TEM, XPS, etc. characterizations revealed the chemical composition, bond structure and morphologies of as-prepared CuO-CN x composites. The results indicated that the introduction of CuO into g-C 3 N 4 relying on the chemical interaction rather than simple physical mixture. Moreover, the increased active sites and the intense chemical bonds could play important roles in improving the catalytic ozonation performances of CuO-CN x composites. In this study, the practical applications of catalysts at different conditions were also investigated. When the mass ratio of CuO/g-C 3 N 4 was 10, the CuO-CN 10 composite exhibited superior catalytic ozonation activity with 97.9% OA removal efficiency after 30 min at pH 5.0. Meanwhile, the CuO-CN 10 showed excellent stability and reusability for contaminant degradation during multiple consecutive cycles. Furthermore, hydroxyl radical and superoxide radical as the major reactive radicals were identified and the catalytic mechanism for OA degradation improvement was also elucidated. Overall, this work would provide an efficient and eco-friendly catalyst for water treatment as well as a new idea for future environmental purification.
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Bo Yu,Fanming Meng,Muhammad Wasim Khan,Rui Qin,Xingbin Liu
Herein, TiO 2 /g-C 3 N 4 /Ag (TCA) composites were successfully fabricated by a simple two-step method and wet chemical reduction. Titanium isopropoxide and melamine were used as precursors to prepare TiO 2 /g-C 3 N 4 heterojunction composites by simple stirring and calcining. Then, different mass fractions of AgNPs were decorated on the surface of the above composites by wet chemical reduction to obtain a sequence of TiO 2 /g-C 3 N 4 /Ag (TCA) composites. TCA composites were analyzed by XRD, TEM, HRTEM, EDS, XPS, BET, Raman spectroscopy, PL spectrum and UV–vis diffuse reflectance spectrum. The results showed that TCA composites had remarkable enhancement in the separation of photogenerated carriers and the utilization of light, which was as result of the coordination of the three components. For photodegradation of RhB or phenol under simulated sunlight, TCA-1 samples revealed the best photocatalytic degradation performance, and the corresponding degradation rates were 91.4% at 60 min and 90.0% at 120 min, respectively. Moreover, TCA-1 composites maintained superior degradation performance after reusability tests, indicating that TCA-1 composites had excellent photochemical stability. For experimental results, a possible photodegradation mechanism of TCA composites was also proposed.
✓ 已验证
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
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.
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2024
·
IF 2.8
Yongyi Li,Huixing Yang,Wei Li,Zhigang Shao,Yongzhuo Yu,Huixiang Yan,Shichao Jiao,Di Lin,Wenxu Zhang,Chaoyu Lv,Yuxin Huang
In this work, ultrathin lamellar g-C 3 N 4 /In 2 S 3 S-scheme heterojunctions doped with P were synthesized by urea recrystallization and investigated to see which ratio was more favorable for photocatalysis. The P doping formed a new Fermi energy level and reduced the forbidden bandwidth. The ultrathin lamellar structure facilitated rapid charge transfer, and the formation of S-scheme heterojunction, the presence of the interfacial electric field, and band bending effectively separated strong redox-capable electron-hole pairs, thus significantly improving the photocatalytic performance. Among the prepared materials, the 50UP-C 3 N 4 /In 2 S 3 photocatalyst with 50 % UP-C 3 N 4 mass fraction showed optimal photocatalytic H 2 production performance, with a hydrogen production rate of 12,387 μmol h −1 g −1 . Moreover, it showed good performance in photocatalytic degradation, with a degradation efficiency of up to 90.2 % of ofloxacin after 120 min of light exposure. This article provided a new perspective on the synthesis of other photocatalysts with carbazide-based S-scheme heterojunction structures.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Liru Yan,Shishuai Sun,Shuangting Ruan,Xiaocheng Liu,Huanqi Cao,Shougen Yin
Design of the photosensitive electrode material provides an effective strategy to improve the capacity and stability of supercapacitors. In this study, the photothermal-driven cobalt–zinc-doped Ni(OH)2/g-C3N4@NF nanoflower electrode materials were prepared base on the in situ chemical etching strategy. The electrochemical performance indicated that the optimized CZNC2.18 (cobalt–zinc codoped β-Ni(OH)2@g-C3N4) electrode material with exceptional stability (103.74% capacitance retention after 5000 cycles at 20 mA/cm2) exhibited an ultrahigh capacitance of 19.10 F/cm2 at a current density of 10 mA/cm2 under illumination, compared to 12.8 F/cm2 under dark conditions, achieving a light gain of 149%. The assembled asymmetric photothermal-assisted supercapacitor device delivers energy densities of 3.55 mWh/cm2 (1.23 mWh/cm2) at corresponding power densities of 8.39 mW/cm2 (37.03 mW/cm2) under illumination, surpassing performance metrics observed under dark conditions. The synergistic effects of photogenerated carriers (holes oxidizing Ni(OH)2 to NiOOH and electrons enhancing conductivity), Zn/Co codoping-induced conductivity improvement, and photothermal-assisted ion transport collectively enable CZNC2.18 exceptional photoelectrochemical performance, establishing a paradigm for light-responsive energy storage material design.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 8
·3573-3584
·
IF 3.5
Xu Man,Luo Yongping,Zeng Linsheng,Huang Ping,Xu Shunjian,Liu Yike,Wang Yongya,Li Xianchang,xie Yu
In consideration of the increased activity of Pt-based catalysts for methanol oxidation in direct methanol fuel cells, it is necessary to apply an ideal support in the construction of Pt-based catalyst for methanol oxidation. In this study, Ag/g-C 3 N 4 nanosheets (Ag/GCNN) nanocomposites with different Ag contents were synthesized and used as the progressive support to construct Pt/Ag/GCNN catalyst. As a nitrogen-rich polymeric semiconductor, GCNN is easily coordinated with various metals. The introduction of Ag nanoparticles can improve the electrical conductivity of the catalyst and cooperate with Pt for optimizing the performance of electrocatalytic oxidation of methanol. The electrochemical experiment results demonstrated that Pt/Ag/GCNN has higher electrocatalytic activity and stability for methanol oxidation than Pt/GC and Pt/GCNN. The mass activity of Pt/Ag/GCNN-0.6 (18.66 mA mg Pt −1 ) is 7.07, 4.60 and 1.26 times that of Pt/GCNN (4.06 mA mg Pt −1 ), Pt/Ag/GCNN-0.4 (4.06 mA mg Pt −1 ) and Pt/Ag/GCNN-0.8 (14.76 mA mg Pt −1 ) at the forward peak potential. The J f / J b ratio of Pt/Ag/GCNN-0.6 is 3.31, which is bigger than that of Pt/GCCN (2.62), Pt/Ag/GCNN-0.4 (2.69), and Pt/Ag/GCNN-0.8 (2.56). A suitable mechanism was proposed to explain that Ag/GCNN supported Pt catalyst can improve the CO toxicity resistance and electrocatalytic performance. Based on the coordination of GCNN, Ag was first modified to form a support, and then the remaining coordination sites were used to support Pt. It provided a new strategy for the design of catalysts for methanol electrooxidation. Graphical abstract
✓ 已验证
DOI
高影响因子
Catalysts
·
2024
·Vol. 14
·期 9
·579
·
IF 3.8
Qingbao Gan,Jianwei Zhang,Jinglin Wang,Yuntian Wei,Shikun Chen,Shuguang Cai,Xueqing Xiao,Chan Zheng
The excessive discharge of antibiotics into aquatic systems is a major issue in many countries worldwide and poses a threat to human health and the sustainable development of society. Hence, developing efficient treatment methods and purification technologies to degrade antibiotics is essential. Herein, we present the synthesis of low-cost, self-propelled tubular Fe3+-incorporated graphitic carbon nitride (g-C3N4-Fe@KF) micromotors using kapok fibers (KFs) as templates and their application as photo-catalysts for the photo-Fenton degradation of tetracycline (TC) under visible-light irradiation. The g-C3N4-Fe@KF micromotors moved rapidly when being propelled by oxygen bubbles generated in a hydrogen peroxide (H2O2) solution as a result of a photo-assisted Fenton reaction. The motion behavior of the g-C3N4-Fe@KF micromotors was dependent on the concentration of H2O2and the length of the micromotors. The propulsion mechanism was discussed in detail. The micromotors efficiently degraded antibiotics via the photo-Fenton process. Photo-Fenton degradation efficiency was attributed to the synergistic effects of the doped Fe3+and g-C3N4under visible-light irradiation and self-propulsion of the micromotors. In addition, the micromotors possessed good reusability, thereby efficiently realizing multiple cycles of degradation. The current work offers an avenue for the design of micromotors, using inexpensive approaches, for various potential environmental applications.
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2015
·
IF 7.435
Wangyang Lu,Tiefeng Xu,Yu Wang,Hongguang Hu,Nan Li,Xuemei Jiang,Wenxing Chen
Visible light-responsive photocatalysis has shown great potential for effluent treatment as an environmentally friendly method. Herein, the photocatalyst of graphitic carbon nitride (g-C 3 N 4 ) coupled with zinc phthalocyanine (g-C 3 N 4 /ZnTcPc) was prepared by immobilizing zinc tetracarboxyphthalocyanine (ZnTcPc) onto g-C 3 N 4 covalently. The spectral response region of g-C 3 N 4 has been extended from 450 nm to more than 800 nm sensitized by ZnTcPc, which is well known for the red/near-IR (Q band) light absorption. Compared with pure g-C 3 N 4 and ZnTcPc, g-C 3 N 4 /ZnTcPc presented a significantly enhanced photocatalytic activity for the degradation of rhodamine B (RhB) and 4-chlorophenol (4-CP) under visible irradiation. The photocatalytic activity of g-C 3 N 4 has been improved by the coupled interaction with ZnTcPc over a wide pH range. Moreover, besides photogenerated hole, the presence of singlet oxygen ( 1 O 2 ), superoxide radical ( O 2 − ) and hydroxyl radical ( OH) has been evidenced in the visible light-responsive catalytic system with g-C 3 N 4 /ZnTcPc, especially in alkaline condition. The possible photocatalytic degradation pathway of RhB has been proposed according to the results of ultra-performance liquid chromatography and high-definition mass spectrometry (UPLC Synapt G2-S HDMS). This synergistic photocatalytic process will provide useful insights to make full use of solar light for future application to eliminate recalcitrant organic pollutants .
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·
IF 7.5
Haize Jin,Yuwang Chen,Kaiqiang Hong,Ziyuan Wang,Xiaoxia Huang,Qikun Wang
SDS-modified geopolymer/Ag 9 (SiO 4 ) 2 NO 3 /g-C 3 N 4 (SGC) unites adsorption, photocatalysis and PDS activation • SGC powder removes 94.12% of pymetrozine at 2 min under simulated sunlight with 3 mM PDS. • 3D-printed SGC monolithic device achieves 96.97% removal at 60 min and stays stable over 5 dynamic cycles. • The h⁺, ·OH, ·O₂⁻, ·SO₄⁻, and ¹O₂ all contribute to PYM degradation by SGC. Photocatalysis combined with peroxydisulfate (PDS) offers a promising route for degrading organic pesticides, but rational design of adsorption and catalytic sites at the nanoscale remains challenging. Here, an innovative sodium dodecyl sulfate (SDS)-modified geopolymer/Ag 9 (SiO 4 ) 2 NO 3 /g-C 3 N 4 (SGC) adsorbent-photocatalyst was reported, which integrated rapid pollutant capture, photocatalysis and PDS activation into a synergistic system for pymetrozine (PYM) degradation. The SDS promoted the uniform intergrowth of GP nanoclusters and ASN nanocrystals on g-C 3 N 4 , and also endowed the SGC with a relatively high surface negative charge density over a wide pH range and could quickly capture cationic or zwitterionic PYM molecules via electrostatic attraction. And the SDS also enhanced the visible-light response capability and narrowed the energy band gaps of SGC, contributing to improving photogenerated charge separation and more efficient PDS activation. The SGC powder achieved a PYM removal efficiency of 94.12% within 2 min, while the 3D-printed SGC fabricated by direct ink writing exhibited a removal efficiency of 96.97% at 60 min under simulated sunlight. Mechanistic investigations revealed that photogenerated electrons were primarily responsible for PDS activation, while h + , ·OH, ·O 2 - , ·SO 4 - , and 1 O 2 all contributed to PYM oxidation. Toxicity assessment of intermediate products and seed germination tests demonstrated a marked reduction in biotoxicity following degradation treatment. Moreover, the 3D-printed SGC maintained high stability over five dynamic cycles, and the in-situ photoreduction of Ag 0 during the cyclic process helped sustain radical generation. This work provides a new design strategy for high-performance adsorption-photocatalysis-PDS synergy systems and demonstrates a practical route for sustainable pesticide wastewater treatment. Download: Download high-res image (274KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）