Scientific Reports
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2025
·Vol. 15
·期 1
·1-16
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IF 3.9
Dong Yuqi,Qiao Qing-an,Wang Ruping,Yang Yueyue,Cai Honglan,Gao Hongwei
Environmental pollution caused by industrial waste is an increasing concern, and the design and development of efficient photocatalysts offer promising approaches to address this issue. A series of novel Zn 0.6 Cd 0.4 S/ZnO/g-C 3 N 4 composites were prepared through a calcination‒hydrothermal method. Under visible light, these materials demonstrated exceptional performance in the photodegradation of methylene blue (MB), rhodamine B (RhB), and tetracycline (TC). Among the composite materials, Z 0.6 C 0.4 S/ZnO/CN-35% exhibited the highest degradation efficiencies for MB (98.52%), RhB (99.45%), and TC (98.20%), demonstrating excellent reusability as well. The photocatalytic performance of the catalysts was assessed across various water sources and different pH conditions. The findings revealed that the degradation efficiency for contaminants in seawater, lake water, and tap water closely mirrored that observed in deionized water, suggesting wide adaptability among different aqueous solutions. The exceptional photocatalytic performance of the composite materials can be attributed primarily to the efficient separation and migration of holes (h + ) and electrons (e − ) via well-contacted interfaces. Free radical capture experiments confirmed that hydroxyl radicals (·OH) and superoxide ion radicals (·O 2 - ) play crucial roles in the reaction process. The photocatalytic mechanism was also revealed via density functional theory (DFT) calculations. This work introduced an innovative strategy to design and fabricate novel photocatalysts, emphasizing their extensive applications from both theoretical and experimental aspects.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Fei Li,Zongxue Yu,Heng Shi,Qiangbin Yang,Qi Chen,Yang Pan,Guangyong Zeng,Li Yan
In the study, the reduced graphene oxide/graphitic carbon nitride sheet membrane (RGO/PDA/g-C 3 N 4 ) was fabricated by the dopamine modification and assembling the RGO/PDA/g-C 3 N 4 composites on the surface of commercial CA (cellulose acetate) membrane, consisting of an RGO/PDA/g-C 3 N 4 -CA composites membrane and RGO/PDA/g-C 3 N 4 free standing membrane. These membrane materials were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Atomic Force Microscope (AFM) and UV–vis diffuse reflectance spectra (DRS). The RGO/PDA/g-C 3 N 4 composites membrane achieve to continuous and simultaneous flow-through separation of oil/water emulsion and degradation of soluble organic dye under visible-light irradiation in a short time. The results demonstrate that the flux of RGO/PDA/g-C 3 N 4 composite membrane was strongly influenced by g-C 3 N 4 ratio. With the g-C 3 N 4 ratio increasing, the membrane flux was gradually improved, besides, the separation rate of oil/water emulsion and retention rate of MB (methylene blue) is about 99.5% and 99.8%, respectively. Most important of all, the composite membrane can keep steady flux and high separation and retention efficiency after 5 times of recycling under visible-light irradiation. The composite membrane investigated in this study hope to become an attractive way as promising candidate for water purification.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Mengxin Zhao,Xin Guo,Zhe Meng,Yinghui Wang,Yuan Peng,Zongqin Ma
In this study, ultrathin molybdenum disulfide (MoS 2 ) nanosheets with thickness of 1.6–8.8 nm were obtained by liquid-phase exfoliating bulk MoS 2 . Then, they were employed as cocatalyst to build ultrathin MoS 2 /g-C 3 N 4 heterojunction by self-assembly method. The degradation reaction of chlorimuron-methyl herbicide and tetracycline antibiotics under visible light was used to evaluate the photocatalytic properties of ultrathin MoS 2 /g-C 3 N 4 . The results showed that ultrathin MoS 2 /g-C 3 N 4 composite exhibit superior photocatalytic performance. The MoS 2 /g-C 3 N 4 composite with 15 wt% of ultrathin MoS 2 nanosheet exhibited the highest degradation efficiency with 90.4% for chlorimuron-ethyl and 91.7% for tetracycline in 45 min under simulated sunlight, which was 8.8 times and 13.4 times than that of bare g-C 3 N 4 , respectively. The outstanding photocatalytic activity of ultrathin MoS 2 /g-C 3 N 4 heterojunction thanks to the unique features of ultrathin MoS 2 nanosheet that it harvesting the entire visible light, increasing the contact surface area with the support and shortened the electron and ion migration length, as well as more exposed edge sulfur atoms as redox centers. The radical scavenger experiments showed that • OH and • O 2 - plays a key role in the photocatalytic degradation process. This study provides a new idea for the design of high-activity a co-catalyst, that is, ultrathin MoS 2 nanosheet has a significant influence on the photocatalytic performance of MoS 2 /g-C 3 N 4 heterostructure photocatalyst .
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Renjie Li,Anli Chen,Qunfen Deng,Yujia Zhong,Ling Kong,Rui Yang
In this work, using melamine and MXene powder as precursors, NH 4 Cl as a template, a novel S-scheme heterojunction composite material g-C 3 N 4 /C-TiO 2 was synthesized by a one-step calcination method. During the calcination process, the gas template NH 4 Cl played a dual role, which not only striped the massive g-C 3 N 4 into porous flakes with a larger specific surface area but also striped the agglomerated MXene derivatives (C-TiO 2 ) nanoparticles, making them bind more closely with g-C 3 N 4 . The charge separation efficiency and photocatalytic performance were greatly improved due to the formation of heterojunction and the larger specific surface area of the sample. Within 50 min, the g-C 3 N 4 /C-TiO 2 exhibited high photocatalytic performance toward ciprofloxacin hydrochloride (CIP·HCl) with degradation efficiencies of 88.14% under visible light (λ ≥ 420 nm), which was 8.9 times higher than that of pure g-C 3 N 4 . In addition, we also used a series of characterizations to confirm the mechanism of S-scheme heterojunction and inferred the possible CIP photodegradation pathway.
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APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Fei Liu,Thien-Phap Nguyen,Qin Wang,Florian Massuyeau,Yi Dan,Long Jiang
Constructing a conductive interface is crucial for the transfer of photoexcited charges in the photocatalytic heterojunction system. In this study, we introduced Ag into g-C 3 N 4 /P3HT system to construct a conductive interface which benefits for transfer of photoexcited charges between g-C 3 N 4 and P3HT. A series of characterizations were employed to investigate the chemical structure , morphology and optical property of the obtained catalysts. And the photocatalytic activity of the as-prepared g-C 3 N 4 /Ag/P3HT composites were evaluated by the degradation of tetracycline (TC) and methyl orange (MO) aqueous solution under visible light irradiation. Results show that the g-C 3 N 4 /Ag/P3HT exhibits a broad absorption band in the region of 400–700 nm and the photocatalytic activity of g-C 3 N 4 /Ag/P3HT obtains a great improvement comparing with that of g-C 3 N 4 , g-C 3 N 4 /Ag and g-C 3 N 4 /P3HT. In addition, the optimized loading content of P3HT is 0.3 mass% based on g-C 3 N 4 . The enhanced photocatalytic performance is due to the introduction of Ag, which improves the transfer of photoexcited charges between g-C 3 N 4 and P3HT. The active species trapping experiment shows that the main active specie is O 2− . After five recycling experiments, the g-C 3 N 4 /Ag/P3HT shows high stability in the photocatalytic performance.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
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IF 3.232
Jun-Tao Cao,Wen-Sheng Zhang,Xiao-Long Fu,Hui Wang,Shu-Hui Ma,Yan-Ming Liu
A high-efficient chemiluminescence (CL) platform for highly selective and sensitive H 2 S detection was constructed on the basis of the quenching effect of S 2 − on the copper ion modified graphitic carbon nitride nanosheets (Cu 2+ -g-C 3 N 4 NSs) enhanced luminol-H 2 O 2 system. Cu 2+ -g-C 3 N 4 NSs with horseradish peroxidase-like catalytic activity were prepared and provide a great improvement for luminol-H 2 O 2 system. The presence of S 2 − induced the formation of CuS precipitate on g-C 3 N 4 NSs surface. The precipitate can block the catalytic Cu 2+ sites on the g-C 3 N 4 NSs surface, resulting in a great CL decrease of CL system. Based on such a mechanism, a simple, highly selective and sensitive CL biosensor for H 2 S detection was designed. Under the optimized conditions, luminol-H 2 O 2 -Cu 2+ -g-C 3 N 4 NSs system gave a decrease of CL intensity with the Na 2 S concentration increasing. The CL biosensor is in a linear range of 10.0 pM–50.0 nM and the detection limit for detecting Na 2 S is as low as 2.0 pM. Moreover, the method here has enjoyed a successful application for determining H 2 S in human plasma samples and the recovery is between 95.7% and 110.0%.
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高影响因子
FUEL
·
2025
·
IF 7.5
Jing Fan,Yanan Yang,Jie Liu,Qi Qi,Fenhong Song
In light of the energy and environmental crises humanity faces, photocatalytic hydrogen production has emerged as one of the effective solutions. Nevertheless, the development of high-performance, low-energy-consumption, and long-lasting stable photocatalysts remains extremely urgent. In this study, a NiS-Mn 2 SnS 4 /g-C 3 N 4 composite with efficient photocatalytic hydrogen evolution performance is synthesized via a simple physical mixing method and calcination process. The introduction of NiS and Mn 2 SnS 4 significantly increases the specific surface area of the g-C 3 N 4 composite, and a dual Type-II heterojunction capable of efficiently separating electron-hole pairs is formed between the components and g-C 3 N 4 . Under 300 W xenon lamp irradiation, the NiS-Mn 2 SnS 4 /g-C 3 N 4 composite achieves a hydrogen evolution rate of 7672.45 μmol·g −1 ·h −1 , corresponding to 3.76, 59.74, and 254.64 times enhancements compared to bare g-C 3 N 4 , NiS, and Mn 2 SnS 4 , respectively. After four cycles, the hydrogen production of NiS-Mn 2 SnS 4 /g-C 3 N 4 still reaches 91 % of the rate in the first cycle. Photoelectrochemical property characterization demonstrates that the composite samples can generate more active sites, reduce the overpotential for H 2 evolution, and enhance light absorption efficiency. Combined with density functional theory (DFT) calculations and band structure analysis, it is confirmed that a strong electronic coupling effect exists among NiS, Mn 2 SnS 4 , and g-C 3 N 4 , and the electron transfer follows a Type-II pathway. This study provides important references and insights for constructing high-activity and high-specific-surface-area g-C 3 N 4 -based photocatalysts.
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JOURNAL OF FLUORESCENCE
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2025
·
IF 3.1
Xue Jinxiong,Huang Jingping,Lin Xue,Pan Wuyuan,Ke Fang
MicroRNA-183-5p is a clinically relevant biomarker, yet its detection is hindered by short sequence length, high homology, and low abundance in complex biological fluids. We report a hydrothermally synthesized nickel chloride-decorated graphitic carbon nitride (NiCl 2 @g-C 3 N 4 ) with intrinsic peroxidase-like and fluorescence activities for label-free dual-mode detection. Characterized by multiple spectroscopic and microscopic techniques, the nanocomposite enables quantitative analysis via π-π stacking and van der Waals interactions between the probe and target, eliminating the need for enzymes or fluorescent labels. Under optimal conditions, using the formula LOD = 3Sb/b, the detection limit was calculated as 0.69. This material with broad linear ranges, excellent selectivity, month-long stability, and recovery rates of 97.7-101.6% in spiked serum. This facile and cost-effective platform offers a promising tool for sensitive miRNA quantification in clinical diagnostics.
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POLYMER COMPOSITES
·
2025
·
IF 4.7
Jiye Jia,Shijie Chen,Haifeng Tian,Dong Wang,Feng Yang,Pei Feng,Cijun Shuai
The low photogenerated charge carriers and quick complex annihilation of titanium dioxide (TiO 2 )/rGO composite leading to an unsatisfactory photocatalysis antibacterial effect limit its application in the bone scaffold. Herein, graphitic carbon nitride (g-C 3 N 4 ) was assembled with TiO 2 /rGO via a solvothermal method for enhancing the photocatalysis antibacterial properties of poly (lactic acid) (PLLA) bone scaffold prepared via selective laser sintering. The results revealed that g-C 3 N 4 expanded the light absorption range of TiO 2 /rGO from blue-violet light to visible light, resulting in the composites having a narrower band gap and producing more photoinduced charge carriers. More importantly, an S-scheme heterojunction was formed between g-C 3 N 4 and TiO 2 , which promoted the recombination of the electrons in the conduction band of TiO 2 and the holes in the valence band of g-C 3 N 4 . Meanwhile, rGO with excellent electrical conductivity reduced the interfacial charge transfer resistance and enhanced charge transfer efficiency, thus further avoiding the recombination rate of electrons and holes, whether TiO 2 or g-C 3 N 4 , and enhancing the photocatalytic properties. Consequently, the holes in the valence band of TiO 2 and the electrons in the conduction band of g-C 3 N 4 possessed high oxidation and reduction capacity, which oxidized H 2 O and reduced O 2 in the microenvironment, respectively, and generated lots of reactive oxygen species. In vitro antibacterial experiments indicated that the PLLA/TiO 2 /g-C 3 N 4 /rGO scaffold showed a better antibacterial effect, with the bacteriostasis rates of E. coli and S. aureus being 99.1% and 98.9%, respectively. In addition, cell adhesion and fluorescence results indicated that the scaffold had good biocompatibility and could provide a suitable microenvironment for the growth and proliferation of cells.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xunfu Zhou,Shiying Song,Xiaoxing Yu,Zhongda Wu,Zhanhao Xiao,Zuofang Yao,Xiaoqin Zhou,Jin Luo,Xuliang Fan,Xiaosong Zhou
Polymer carbon nitride (g-C 3 N 4 ) demonstrates a thermodynamically favorable profile for photocatalytic overall water splitting. Nonetheless, the practical catalytic performance is limited by slow reaction kinetics, mainly because of the inadequate quantity of surface redox-active sites. It is evident that pristine g-C 3 N 4 shows minimal activity in the photocatalytic process of overall water splitting. Herein, we developed a strategy for achieving pure water splitting using photoexcited g-C 3 N 4 with MnOOH and Pt serving as redox cocatalysts. The innovation of this work is based on the deposition of Mn 2 N 0.86 /Mn 4 N onto g-C 3 N 4 as a precursor material. This precursor undergoes in-situ hydrolysis to form Mn(OH) 2 and in-situ photo-oxidation to generate MnOOH, which acts as an oxygen evolution cocatalyst by capturing photogenerated holes and facilitating the oxygen evolution reaction. Concurrently, H 2 PtCl 6 is employed as a precursor and undergoes in-situ photo-reduction to form Pt nanoparticles, which serve as a hydrogen evolution cocatalyst by capturing electrons and promoting the hydrogen evolution reaction. With the synergistic effect of these dual cocatalysts, efficient photocatalytic water splitting was achieved, yielding hydrogen (11.64 μmol h −1 ) and oxygen (5.47 μmol h −1 ) in a nearly 2:1 stoichiometric ratio under light irradiation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Fangke Yu,TianYi Cao,Hongrui Ma,Jing Yang,Liming Jing
This study reported a photoelectric co-catalyst system of jet-flow reactor for efficient mineralization of Bisphenol A (BPA), where H 2 O 2 was photoelectro-generated in situ from O 2 reduction on gas diffusion electrodes fabricated by nitrogen-doped porous carbon and graphitic carbon nitride (NPC/g-C 3 N 4 ). Current density , aeration rate , amount of MoS 2 and FeSO 4 catalyst in the jet-flow reactor photoelectrocatalysis system for BPA removal were investigated. The NPC/g-C 3 N 4 cathodes were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR), and the electrochemical workstation. The results show that at pH 7, the NPC/g–C 3 N 4 –(60%) has the highest rate of electrical generation hydrogen peroxide. When the pH rised, at pH values of 7, the cumulative of hydrogen peroxide increased, when the solution get slight alkaline, it was gradually decreased. Compared with the traditional electro-Fenton technology, the photoelectric method of co-catalysis has strong ·OH production rate and high oxidation ability. A possible mechanism for BPA degradation was oxidized by hydroxyl radical (·OH), resulting in the formation of shorter chain bisphenol A (BPA), which followed the same reaction cycle as BPA until it was mineralized. The removal rate of BPA can reach 100% within 20 min, the TOC removal rate up to 90%. This work provides new opinion into the development of a photoelectric collaborative system for H 2 O 2 generation and the fast BPA degradation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Nan Su,Shasha Cheng,Pingfan Zhang,Hongjun Dong,Yuhai Fang,Xiangtong Zhou,Yun Wang,Chunmei Li
The interfacial charge transfer control is a key and arduous issue for propelling the migration/separation of photogenerated carriers for heterojunction photocatalysts . Here, a new 2D/2D C 3 N 4 /C 3 N 5 nonmetal van der Waals (VdW) heterojunction is fabricated by the simple self-assembly technique in acidic medium, whose charge separation efficiency is promoted dramatically, thus being endowed with the high-efficiency photocatalytic hydrogen evolution (PHE) performance. The PHE rate reaches up to 3.33 mmol h −1 g −1 under the visible light and the apparent quantum efficiency (AQE) of 20.6% is achieved at 420 nm on the optimal 2D/2D C 3 N 4 /C 3 N 5 -5% sample. Furthermore, the 2D/2D C 3 N 4 /C 3 N 5 nonmetal VdW heterojunction also exhibits the desired stability because there was no significant decrease after PHE reaction of 10 cycles with total 40 h. Such outstanding PHE activity and stability originate from the impelled separation of photoinduced charge carriers and the powerful interfacial interaction through forming Z-Scheme charge transfer path and π-π coupling effect between C 3 N 4 and C 3 N 5 nanosheets . This work takes a significant guiding and demonstration for designing and exploiting other novel nonmetallic polymer-based VdW heterojunctions in the photocatalytic application field.
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