DIAMOND AND RELATED MATERIALS
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2026
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IF 5.2
Qingwang Liu,Xiangping Pan,Jiewei Rong,Yuxin Zheng,Ruilin Guo,Mai Xu
Antibiotics pose a significant threat to ecosystems and human health, creating an urgent need to develop highly efficient visible-light-driven degradation catalytic technologies. In this study, we synthesized a CuO/B-g-C 3 N 4 (CO/BCN) direct Z -scheme heterojunction composite photocatalyst based on non-metallic doping and heterojunction engineering. XRD, TEM, and XPS analyses indicate that the material exhibits good crystallinity and forms a tightly bound interfacial heterostructure. Photoelectronic measurements reveal a significant enhancement in visible light absorption and an improvement in carrier separation efficiency. Under illumination, the 0.2-CO/BCN system achieved 97.6% degradation of tetracycline (TC) within 120 min. The performance improvement is attributed to the Z -scheme heterojunction, which facilitates charge transport and suppresses the recombination of photo-generated electrons and holes. Radical trapping, EPR and work function characterization further elucidated the reaction mechanism. This study provides a theoretical basis and experimental reference for regulating energy levels through elemental doping and constructing heterojunction composite photocatalytic materials. Download: Download high-res image (266KB) Download: Download full-size image
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MATERIALS RESEARCH BULLETIN
·
2020
·
IF 4.019
Huihui Zhu,Xiaoju Yang,Min Zhang,Qiuye Li,Jianjun Yang
Constructing two-dimensional (2D) heterostructure is an effective method to obtain highly efficient photocatalysts. In this work, 2D/2D TiO 2 /g-C 3 N 4 heterostructures were constructed via in-situ growth of TiO 2 nanosheets on the surface of g-C 3 N 4 nanosheets by a facile hydrothermal co-assembly technique. The increased dispersion is favorable to expose more vacancies, which is beneficial to the enhancement of visible light absorption. This unique 2D/2D heterostructure exhibits ultrathin thickness and larger interfacial contact area, which results in shorter migration distance of photo-generated carriers to the surface and faster participation in photocatalytic water splitting. As expected, the optimized TiO 2 /g-C 3 N 4 nanocomposites showed a higher photocatalytic hydrogen evolution performance under visible light irradiation than that of pristine g-C 3 N 4 and TiO 2 nanosheets. The improved performance can be attributed to the ultrathin nanosheet structure, the intimate interfacial contact and the presence of surface oxygen vacancies. More appealingly, this environment-friendly 2D/2D TiO 2 /g-C 3 N 4 nanohybrid would attract more attention in water splitting.
研究领域:
材料科学
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光催化
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纳米材料
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能量转换
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环境技术
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NANO
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2022
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IF 1.438
Wenquan Hu,Jia Song,Ming Wang
Sn 3 O 4 /g-C 3 N 4 heterostructure nanomaterials were prepared by calcining melamine and the hydrothermal method. The microstructure and morphology of the synthesized specimen were characterized by X-ray diffraction (XRD), electron microscope (SEM and TEM) and nitrogen adsorption and desorption (BET). The photocatalytic activity was evaluated by the photodegradation of methylene blue (MB) under visible light irradiation and the electrochemical performance was tested under a typical three-electrode configuration. The results show that the Sn 3 O 4 /g-C 3 N 4 heterojunctions exhibit more superior photocatalytic performance for degrading MB compared with single Sn 3 O 4 and g-C 3 N 4 . The degradation rate of MB reaches up to a maximal 90.30% within 75 min, which is far higher than that of Sn 3 O 4 (61.30%). It is attributed to the effective interfacial contact between Sn 3 O 4 and g-C 3 N 4 , which increases charge transfer and prolongs electron-hole separation time. The specific capacitance of Sn 3 O 4 /g-C 3 N 4 is 28.6% higher than that of Sn 3 O 4 due to the formation of a heterostructure.
研究领域:
材料科学
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纳米技术
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光催化
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电化学
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Analytical Methods
·
2026
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IF 3
Ya Zou,Zhouhong Tan,Jiaqian Li,Anzhong Peng,Jieli He
Clozapine (CLZ), as an efficient atypical antipsychotic drug, faces significant challenges in clinical application, such as a narrow treatment window and huge pharmacokinetic differences between individuals. Therefore, developing sensitive and reliable detection methods for CLZ is crucial for ensuring therapeutic efficacy and reducing medication risks. Strongly blue-fluorescent g-C3N4 nanosheets (g-C3N4Ns) were successfully prepared from bulk g-C3N4 through a two-step process involving protonation and subsequent ultrasonic exfoliation. Leveraging the charge-transfer-induced dynamic quenching of their fluorescence by CLZ, we developed a sensitive analytical method using these nanosheets as a fluorescent probe. The experimental results indicate that this method exhibited a wide linear range (0.02–500 µM) and a low detection limit of 3 nM. When applied to the analysis of bovine serum and clozapine tablets, the spiked recovery rate of CLZ was within the range of 92.0–104.7%, with a relative standard deviation (RSD) of less than 5%, and the results were satisfactory. Moreover, the probe demonstrated excellent selectivity and anti-interference capability against multiple potential interferents. In summary, the g-C3N4Ns fluorescence sensing platform developed herein integrates rapid response, high sensitivity, and excellent reliability and has been successfully applied to CLZ detection in complex matrices. This work establishes a solid foundation for future applications in real human plasma samples and ultimately serves therapeutic drug monitoring (TDM).
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.4
Weitao He,Chun Miao,Wei Jiang,Li Yan,Chunbo Liu,Keyu Cui
Photocatalysis, which represents a clean and efficient energy conversion technology, shows great potential for addressing both environmental pollution and the energy crisis. Within this context, photocatalytic CO 2 reduction and pollutant degradation represent important research directions. In this study, CdIn 2 S 4 /g-C 3 N 4 (g-C 3 N 4 , graphitic carbon nitride) composites were hydrothermally synthesized and assessed for their photocatalytic performance in the reduction of CO 2 and the degradation of methyl orange and tetracycline as model pollutants. Among the synthesized composites, the optimal photocatalytic activity was achieved by the CdIn 2 S 4 /g-C 3 N 4 (80) composite, with the degradation efficiency for methyl orange reaching 97.21% over 100 min and the reduction efficiency for CO 2 reaching 74.34 μmol g −1 over 4 h. The obtained results demonstrated that the heterojunction formed between CdIn 2 S 4 and g-C 3 N 4 effectively promoted the separation of photogenerated charge carriers while effectively suppressing their recombination, thereby improving the photocatalytic performance. Moreover, a cyclic stability experiment demonstrated that the CdIn 2 S 4 /g-C 3 N 4 composite exhibited excellent recyclability, which is important for its practical application. This work therefore provides a promising strategy for the design of highly efficient and stable photocatalysts toward sustainable environmental remediation and energy conversion.
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Materials
·
2026
·Vol. 19
·期 17
·3673
·
IF 3.7
Caimei Ma,Jiangbing Li,Xinlu Fan,Qingyang Yu
Aiming at the problem that the selectivity of heterogeneous catalysts is difficult to be controlled and the active components are easy to be lost in the acetylene double carbonylation reaction, this paper constructs a highly efficient Pd-based catalyst through the combination of carrier morphology engineering and surface basicity regulation. Using melamine/urea as a precursor, tubular carbon nitride (TCN) was constructed by hydrothermal calcination, and then Pd/TCN-series catalysts were prepared by ultrasonic-assisted impregnation loading 5 wt% Pd and heat treatment in a N2atmosphere. At the same time, bulk g-C3N4(BCN) and activated carbon (AC), TiO2, and ZSM-5 supported systems were used as controls. The characterization results show that compared to BCN, TCN-500 (calcined at 500 °C) has a higher specific surface area (40.19 m2/g vs. 12.47 m2/g) and pore volume (0.1850 cm3/g vs. 0.0792 cm3/g), which provides abundant anchoring sites and efficient mass-transfer channels for Pd nanoparticles. After the introduction of Pd, the total base amount of the catalyst increased significantly from 0.4866 to 1.7172 mmol/g, and the strong Lewis-base center was significantly enhanced. TEM/XRD confirmed that Pd was uniformly dispersed on TCN-500 and mainly exposed the (111) crystal plane. XPS further revealed that there was a stronger electron-coupling effect between Pd and the support. Under the reaction conditions of 70 °C and 5 h, the selectivity of Pd/TCN-500 to dimethyl butenedioate was up to 83.7% (acetylene conversion was 59.6%), which was significantly better than that of the contrast carrier system. The cycle test showed that the selectivity and conversion of the catalyst were reduced to 54.4% and 41.1%, respectively, on the third use. The performance degradation was mainly attributed to the oxidative damage of the TCN nanotube skeleton and the passivation of the surface active defect sites. In this study, the synergistic effect of tubular morphology and surface Lewis basicity effectively stabilized the Pd active center and regulated the product selectivity, which provided a new idea for the development of efficient heterogeneous catalysts for acetylene double carbonylation in non-petroleum routes.
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ELECTROCHIMICA ACTA
·
2025
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IF 5.6
Zipeng Zou,Fangyuan Wang,Siyu Yang,Lu Wu,Yanhong Tu,Jiahao Dai,Jiping Su,Hongpeng Huang,Xiaohui Luo,Jianping Qiu,Yi Mao
To address the escalating antibiotic contamination in aquatic environments, this study developed Ti 3+ self-doped TiO 2 nanotube arrays/g-C 3 N 4 heterojunction photoanodes (TiO 2-x NTAs/g-C 3 N 4 ) via an integrated in situ synthesis strategy combining electrochemical oxidation, reduction, and chemical vapor deposition. Comprehensive characterization verified g-C 3 N 4 being uniformed dispersed on TiO 2 nanotube surfaces, with Ti 3+ doping significantly improving charge carrier separation efficiency. The photoelectrocatalytic system, utilizing the composite material and platinum as the photoanode and the cathode, respectively, achieved outstanding performance in the degradation of enrofloxacin (ENR). Compared with photocatalytic (72.4%) and electrocatalytic (10.4%) process within 120 min, photoelectrocatalytic process demonstrated the strongest degradation activity (85.4%) with significant synergy. The prepared TiO 2-x NTAs/g-C 3 N 4 photoanode showed robust stability, maintaining nearly unchanged ENR degradation efficiency over 10 cycles. Radical quenching experiments and electron paramagnetic resonance analysis identified the photogenerated holes (h⁺) and superoxide radicals ( • O 2 ⁻) as the dominant reactive species. The synergistic interplay between Ti 3+ doping and heterojunction engineering enabled dual optimization of photon utilization and interfacial charge dynamics. Density functional theory calculations coupled with product analysis elucidated three primary degradation pathways: piperazine ring cleavage, quinolone group oxidation, and defluorination. This work provides mechanistic insights into antibiotic degradation and advances material paradigms for photoelectrocatalytic water remediation.
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RSC Advances
·
2015
·Vol. 5
·期 69
·56239-56243
·
IF 3.84
Kaixing Zhu,Wenjun Wang,Alan Meng,Meng Zhao,Junhu Wang,Mei Zhao,Dongliang Zhang,Yuping Jia,Chunhua Xu,Zhenjiang Li
g-C3N4 with a layered structure has been proven as an outstanding metal-free organic photocatalyst because of its appropriate bandgap, abundant building elements, and excellent chemical stability. Here, a simple one-step ball milling method is presented for synthesis of mechanically exfoliated g-C3N4 (MECN) thin nanosheets at large scales for the first time. Characterization results showed that gradual size reduction, accompanied by a continual bandgap absorption shift, occurred with increasing grinding time. The obtained MECN thin nanosheets showed significantly enhanced simulated sun light driven photocatalytic activity toward organic degradation compared to their bulk counterpart, highlighting the crucial role of morphology and surface area on the photocatalytic performance.
研究领域:
材料科学
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光催化
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纳米材料
·
环境工程
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Journal of Water Process Engineering
·
2023
·
IF 7
Lei Ma,Qiuyan Bi,Wanji Zhou,Xingliang Liu,Fuju Qi,Hao Zhang,Yifan Gao,Shiai Xu
Nanofiltration (NF) membrane with high selectivity and permeance is important for recovering lithium from salt lake brine. In this work, sandwich-like NF membranes were prepared using polyamide (PA) as the interfacial polymerization (IP) layer, dopamine (DA) and zwitterion-g-C 3 N 4 as the composite interlayer and polyethersulfone (PES) ultrafiltration (UF) membrane as the substrate. Three NF membranes were prepared with different zwitterion-g-C 3 N 4 : M3 membrane modified with C 5 H 12 ClNO 2 -g-C 3 N 4 , M4 membrane modified with C 12 H 24 N 2 O 4 S-g-C 3 N 4 and M5 membrane modified with C 19 H 39 NO 2 -g-C 3 N 4 , and their physical and chemical properties, separation capacity, and antifouling behaviour were analyzed. The zwitterion-g-C 3 N 4 composite interlayer improves the hydrophilicity and pore structure of NF membranes. The water contact angle (CA) of M5 membrane is 25.5°and its pore size is 0.49 nm. M5 membrane shows a high retention rate of 96.66 % for Mg 2+ in mixed salt solution (Mg 2+ /Li + = 84) and performs well in salt lake brine with a rejection of 97.90 % to Mg 2+ . The flux recovery ratio (FRR) can be kept above 93 %. This study may give ideas for the preparation of composite NF membrane for water softening and lithium utilization.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiaoyan Li,Rui Zhao,Hongfang Li,Jing Jiang,Lunhong Ai,Xuejuan Cao,Juanli Liu,Hanjun Zou,Youyu Duan
Suffering from inefficient separation and transfer of photogenerated carriers, the deeply photocatalytic oxidation of NO-to-NO 3 – over g-C 3 N 4 is still a daunting challenge. Well-designed heterojunction photocatalysts have been proven to be effective in steering charge transfer for achieving a particular migration path and more active sites, which hold huge promise in further performance stimulation. Herein, in-situ face-to-face hydrothermal approach is developed to prepare a multilayer heterostructure O doping g-C 3 N 4 (O-g-C 3 N 4 ) with W 18 O 49 (O-g-C 3 N 4 @W 18 O 49 ). The experimental and theoretical results show that the unique multilayer heterostructure can improve the separation efficiency of carriers by changing the electron migration path. Moreover, doping O atoms are identified as the newly formed active centers to largely facilitate the activation of NO. Impressively, the O-g-C 3 N 4 @W 18 O 49 photocatalyst thus exhibits largely improved photocatalytic NO removal rate (56.7 %, 0.1 g of sample) and high selectivity of NO to NO 3 – (98.3 %). It outperforms the reported photocatalysts materials in visible light. This study not only provides a facile strategy for experimentally screening advanced photocatalytic materials, but also paves the way for the deep oxidation of NO.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Jie Zhou,Beibei Zhu,Lu Wang,Yan Bao,Guofeng Guan
Higher electron transfer efficiency is an important way to improve the activity of photocatalysts. A novel Z-scheme CdS/CeO 2 /g-C 3 N 4 nanocomposite was successfully synthesized by a solvothermal method, and its photocatalytic activity was evaluated by the degradation of phenol. The phase structure, morphology, surface structure, and atomic valence state of the as-obtained photocatalyst were characterized by XRD, SEM, TEM, FT-IR, XPS, and UV–Vis absorption spectroscopy, respectively. The CdS/CeO 2 /g-C 3 N 4 nanocomposite exhibited a remarkable photocatalytic activity and a rapid degradation ability for phenol with a degradation rate of 95 % in 180 min, which was considerably better than those of pure CeO 2 and CdS/CeO 2 under the same conditions, suggesting a synergistic effect in the nanocomposite. The enhancement of the photocatalysis ability of the nanocomposite is mainly attributed to the higher adsorption capacity of three-dimensional porous g-C 3 N 4 and the three-dimensional space electric field formed by its complex with CdS and CeO 2 . The three-dimensional porous structure is not only conducive to the efficient adsorption of pollutants but also provides active sites for photocatalytic reactions. The three-dimensional space and the network interconnection structure are conducive to the directional migration of photogenerated charges and increase the carrier lifetime. In brief, this work provides a new route to the design and synthesis of CdS/CeO 2 /g-C 3 N 4 for colorless organic pollutants photodegradation under visible light.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2023
·
IF 6.8
Wei Liu,Jin Zhang,Qun Kang,Hongbing Chen,Ru Feng
Environmental pollution by organic pollutants poses a great threat to the ecosystem and human development. Solar-powered catalytic oxidation technology can solve the existing energy and pollution crisis. Hence, in this work, cubic nano-In 2 O 3 modified g-C 3 N 4 composite was synthesized by in situ calcination, then it was coupled with hydrogen peroxide for the degradation of antibiotic under visible light. The results of SEM and XPS showed that In 2 O 3 and g-C 3 N 4 were closely combined. The catalytic oxidation efficiency of the antibiotic doxycycline was greatly improved when the as-prepared compound was coupled with hydrogen peroxide, and 88.2% of doxycycline was degraded within 80 min. By designing the active species inhibition test, it was found that a large number of hydroxyl radicals were generated in the system after adding hydrogen peroxide, which accelerated the degradation of the target. Hydrogen peroxide not only acts as a source of hydroxyl radical, but also as an active electron acceptor, which promotes the separation of photogenerated electron-hole pairs in the composite photocatalyst. Therefore, the double oxidation system formed by In 2 O 3 /g-C 3 N 4 coupled with hydrogen peroxide can degrade the target at a higher rate. This work provided a research basis for the synthesis of In 2 O 3 with regular morphology and simplified synthesis of In 2 O 3 /g-C 3 N 4 , and explored the practicability of the coupling method of double advanced oxidation for pollutant degradation.
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