FUEL
·
2024
·
IF 6.7
Boxiao Zhao,Jun Xu,Xiaoming Liu,Along Gao,Huiqin Guo,Liushui Yan,Jun Lin
Various of CoS 2 /g-C 3 N 4 nanosheet composites were fabricated through supramolecular self-assembly and copolymerization approaches. This fabrication entailed the incorporation of CoS 2 nanoparticles into ultra-thin layers of g-C 3 N 4 nanosheets. Demonstrating a significant boost, these composites achieved a 28-fold increase in the photocatalytic H 2 evolution from H 2 O with visible light response, without the aid of noble metal nanocrystalline co-catalysts. The enhanced CoS 2 /g-C 3 N 4 composite sustained approximately 92.4 % of its initial photocatalytic activity after four repeated uses. The planar structure of g-C 3 N 4 nanosheet amplifies its specific surface area, which improves access to catalytic sites and reduces the transport distance for photo-excited electrons and holes. Moreover, the close conjunction of CoS 2 nanoparticles and g-C 3 N 4 nanosheets establishes p-n heterojunctions, which promote swift charge separation and transfer at the material interface. Based on these characteristics, an initial model for the photocatalytic process has been proposed. With its remarkable photocatalytic performance and durability, the developed CoS 2 /g-C 3 N 4 composite presents substantial potential for solar-driven H 2 production.
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Journal of Water Process Engineering
·
2024
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IF 6.3
Chuangbin Hong,Jiehang Zhou,Wenguang Wang,Liangpeng Wu,Shimin Long,Wentao Zhou,Yuxi Guo
Catalytic activation of peroxymonosulfate (PMS) is one of the important research areas in the development of advanced oxidation technology for wastewater treatment. At present, the development of high-performance catalysts for PMS activation has become a research hotspot. Herein, (Cu + decorated g-C 3 N 4 )/Bi 2 WO 6 ((Cu + /g-C 3 N 4 )/Bi 2 WO 6 ) composite was prepared successively by calcination and solvothermal method, which was used in visible light-assisted PMS activation for the degradation of rhodamine B (RhB). The construction of S-scheme heterojunctions between Cu + decorated g-C 3 N 4 and Bi 2 WO 6 facilitated the activation of PMS, leading to a RhB degradation ratio of 98.46 % within 50 min. The corresponding reaction kinetic was significantly improved by a factor of 2.32 and 7.94 compared with that of CCN and BWO, respectively. The enhanced performance of the (Cu + /g-C 3 N 4 )/Bi 2 WO 6 can be attributed to the successful construction of S-scheme heterojunction, which facilitates the separation of photogenerated carriers and accelerates the PMS activation to produce abundant active species. Furthermore, the (Cu + /g-C 3 N 4 )/Bi 2 WO 6 composites exhibit strong stability and reusability following three cycles. In addition, the intermediates produced during the RhB degradation process were investigated by liquid chromatograph mass spectrometer (LC-MS). This study provides a new insight into the preparation of S-scheme photocatalysts for the photocatalytic-PMS activation system that will achieve efficient removal of dyes from wastewater.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 12
·1-10
·
IF 5.3
Wang Linhai,Hu Xiao,Yao Guoqing,Chen Qinhua,Wang Sicen
A visual aptasensor based on the combination of graphitic carbon nitride loaded with platinum nanoparticles (PtNPs/g-C 3 N 4 ) and deoxyribonuclease I (DNase I) was developed for detecting acetamiprid. The prepared PtNPs/g-C 3 N 4 exhibited excellent peroxidase (POD)-like activity, demonstrating the capacity to oxidize the colourless o-phenylenediamine (OPD) to produce the coloured product diaminophenazine (DAP) in the presence of hydrogen peroxide (H 2 O 2 ). The DNA aptamer of acetamiprid can adsorb onto the surface of PtNPs/g-C 3 N 4 , thereby inhibiting its POD activity. The binding of acetamiprid to its aptamer results in the aptamer desorbing from the surface of PtNPs/g-C 3 N 4 and subsequent digestion by DNase I. Ascribed to the synergistic effect of these factors, the aptasensor can achieve the rapid on-site detection of acetamiprid based on the acetamiprid-induced the colour change of the solution just with the smartphone. Furthermore, due to the remarkable fluorescence signal of DAP at 570 nm, the aptasensor under fluorescence mode enables highly sensitive and quantitative detection of acetamiprid with a linear range of 1 ng/mL to 4 µg/mL and a detection limit as low as 0.31 ng/mL. The aptasensor has successfully realized the detection of acetamiprid in river water and cucumber samples, offering a novel perspective for the rapid assessment of environmental pollution and food safety risks associated with acetamiprid residues. Graphical abstract
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OPTICAL MATERIALS
·
2024
·
IF 3.8
Lianke Zhang,Ruidan Zhang,Shuaishuai Zhang,Peng Sun
A composite photocatalyst KCN/LFO was synthesized using K-modified g-C 3 N 4 (KCN) and LaFeO 3 (LFO). The photocatalytic activity of the KCN/LFO was evaluated by degrading indole (heterocyclic organic compound). The KCN/LFO-10 (mass fraction of LaFeO 3 with 10%) displayed the highest removal rate of indole. Indole was degraded to 97.366% after 60 min. The photocurrent and electrochemical impedance spectroscopy (EIS) results suggested that the close correlation between KCN and LaFeO 3 can increasing the efficiency of photogenerated carrier separation. The capture experiment results demonstrated that ·O 2 − and ·OH is primary active substance, respectively. Moreover, the degradation efficiency of KCN/LFO-10 to indole remains stable at 87% after four successive experiments of indole photocatalytic degradation. This work presents an effective method for addressing the pollution caused by heterocyclic organic compound .
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QUIMICA NOVA
·
2025
·
IF 0.7
Meng Shuangyan,Liu Bin,Xie Minglin,Yun Chaoxin,Qiang Jin,He Kaizhou,Yang Zhiwang,Wang Xiangqian
A composite photocatalyst, xTCN (xOTiO2/g-C3N4, where x represents the added quantity of graphite carbon nitride (g-C3N4)), was synthesized using a straightforward one-step hydrothermal method with H2O2 as an oxidant. The H2O2 incorporation into the xTCN composite facilitated the enrichment of oxygen (O) in titanium dioxide (TiO2). This synthesis process effectively reduced the bandgap energy, minimizing the recombination of photogenerated carriers. Concurrently, an O atom was integrated into the g-C3N4 molecule, which altered its bandgap structure and enhanced the photogenerated electron-hole separation efficiency. The dual modification effect was observed when 0.9TCN was used as the catalyst, which converted 77% of benzalcohol with a selectivity exceeding 99%. Additionally, five cycles of reuse only slightly decreased the benzalcohol conversion (by 16%) and selectivity (by 9%), indicating good reusability of the xTCN photocatalyst. The xTCN photocatalyst had an unchanged molecular structure before and after the photocatalytic reaction, demonstrating its superior light stability. The potential photocatalytic reaction mechanism was explored through an active species capture experiment and a Mott-Schottky (M-S) curve test. The results of these studies suggested that •O2- and •OH were the primary reactive species in the photocatalytic reaction.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Limei Yang,Ye Liu,Rongxue Wang,Linqian Hou,Yaling Yang
A K-doped carboxylated polydopamine (PDA) modification of the g-C3N4 (K-g-C3N4@PDA) nanozyme was effectively performed by one-step potassium salt-assisted thermal copolymerization and hydrothermal strategies. K-g-C3N4@PDA showed excellent peroxidase (POD)-like activity, and ferric ammonium citrate (FAC) efficiently promoted the generation of hydroxyl radicals (˙OH). Furthermore, K-g-C3N4@PDA oxidized 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) in the presence of H2O2 to produce a blue-green product, and FAC boosted the POD-like activity with an exceptional linear relationship and low detection limit (0.018 μg mL−1). Importantly, a recovery rate of 94.09–105.17% was attained when the developed method was effectively used to assess FAC in culinary salt samples using a spiking procedure.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Na Wang,Yibo Zhang,Zelin Meng,Mingyang Song,Heming Zhao,Yang Wang,Shuai Bai,Jianglei Hu,Fengwei Shi,Xia Yang
Addressing the low surface area and high charge recombination of graphitic carbon nitride (g-C 3 N 4 ), this study employs a synergistic carboxylation and MOF-loading strategy. Copper-based MOF (Cu-MOF) was uniformly loaded onto carboxylated spherical g-C 3 N 4 (C 3 N 4 –C) via a solvothermal method, creating a visible-light-responsive C 3 N 4 –C-MOF photocatalyst. Material characterization results indicate that the characteristic peak at 1632 cm −1 in the Fourier Transform Infrared Spectroscopy confirms the successful grafting of 4-carboxybenzoic acid (4-CBA). Carboxylation enhanced hydrophilicity and optimized surface charge, improving reactant adsorption. Photoelectrochemical tests showed significantly boosted visible light absorption, increased photocurrent density, and reduced EIS arc radius, confirming efficient interfacial charge separation. Photocatalytic hydrogen production experiments revealed that under simulated solar irradiation, the hydrogen production rate of C 3 N 4 –C-MOF2.0 reached up to 12.68 mmol g −1 h −1 , representing an approximately 1.68-fold increase compared to the unmodified C 3 N 4 -MOF. This work provides a novel approach for designing MOF/functionalized g-C 3 N 4 composites, advancing solar-driven hydrogen production.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yalai Cen,Yuelan Fang,Xiaokun Li
High blood pressure is a serious condition that increases the risk of stroke and chronic disease. Amlodipine besylate (ADB), a calcium channel blocker, is employed in the management of hypertension. On this basis, the development of an uncomplicated and stable approach for the detection of ADB is very necessary. NiCo 2 O 4 has a strong structural stability, a large specific surface area, while g-C 3 N 4 has rich surface active sites, based on the advantages of both materials. NiCo 2 O 4 @g-C 3 N 4 nanocomposites were fabricated via a triple-stage hydrothermal synthesis-thermal polymerization-high-temperature calcination method, the material allowed for the creation of an ultrasensitive electrochemical sensor to measure ADB. The redox behavior of ADB at modified electrodes was analyzed using cyclic voltammetry and differential pulse voltammetry. Research shows NiCo 2 O 4 @g-C 3 N 4 /GCE composite electrodes are not easily fall off, have good repeatability, high stability, and strong anti-interference. The composite electrode has a highly sensitive signal response to ADB. At optimal parameters, the linear detection range of ADB on the composite electrode is 0.8–70 μM, with a minimum detectable concentration of 0.026 μM. This sensing platform exhibited reliable performance for real-world sample detection. The proposed method establishes an innovative detection platform for ADB, holding great promise for practical applications.
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iScience
·
2024
·
IF 4.6
Ai-Ping Yan,Yu-Jue Qiu,Xing-En Wang,Guang-Hua Wang,Xian-Kui Wei,Xin-Tian Li,Xiao-Die Chen,Xing Shang,Shun-Liu Deng,Jian-Wei Zheng,Su-Yuan Xie
C 3 N 4 is widely applied in the synthesis of single-atom catalysts. However, understanding on the active site and the reaction mechanism is not fully in consensus. Especially, bare studies have considered the coordination environment of the single-atomic dopant and the effect of nitrogen vacancy on C 3 N 4 . In this study, we found that the presence of nitrogen vacancies promotes the activation of water and reduces the activation energy barrier for hydrogen generation. The results show that a synergistic effect between single-atom Pt and nitrogen vacancies enables the catalyst to achieve a superior hydrogen production rate of 3,890 μmol/g/h, which is 16.8 times higher than that of pristine C 3 N 4 . Moreover, the catalyst is also applicable for photocatalytic hydrogen production from seawater without significantly decreased hydrogen production rate. This study paves the way for the rational design and optimization of next-generation photocatalysts for sustainable energy applications, particularly in solar-driven hydrogen production.
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Chemistry-An Asian Journal
·
2024
·
IF 3.5
Chunxia Yang,Hailong Cao,Fengyun Su,Mengzhen Tian,Haiquan Xie,Yezhen Zhang,Xiaoli Jin,Xin Li,Zhengdao Li
Photocatalytic H 2 evolution by water splitting is a promising approach to address the challenges of environmental pollution and energy scarcity. Graphitic carbon nitride (g-C 3 N 4 ) has emerged as a star photocatalyst because of its numerous advantages. To address the limitations of traditional g-C 3 N 4 , namely its inadequate visible light response and rapid recombination of photogenerated carriers, we employed a schiff base reaction to synthesize −C=N− doped g-C 3 N 4 . The introduction of −C=N− groups at the bridging nitrogen sites induced structural distortion in g-C 3 N 4 , facilitating n-π* electronic transitions from the lone pair electrons of nitrogen atom and extending light absorption up to 600 nm. Moreover, the presence of heterogeneous π-conjugated electron distribution effectively traps photogenerated electrons and enhances charge carrier separation. Benefiting from its expanded spectral response range, unique electronic properties, increased specific surface area, the doped g-C 3 N 4 exhibited outstanding photocatalytic H 2 evolution performance of 1050.13 μmol/g/h. The value was 5.9 times greater than the pristine g-C 3 N 4 .
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TALANTA
·
2024
·
IF 5.6
Xue Zhang,Yunsheng Shang,Qi Xie,Xingzhe Hu,Ke Wu,Lu-Lu Qu,Yingqiu Gu
Developing a Surface-enhanced Raman spectroscopy (SERS) method with excellent detecting ability, good recyclability and analyzing multiple pollutants rapidly are critical for evaluation of water quality in emergency pollution affairs. While constructing a multifunctional substrate with these characteristics to realize the application of SERS in water quality monitoring remains a challenge. In this work, a reusable Au@R–Fe 3 O 4 /g-C 3 N 4 SERS substrate is prepared by loading Au nanoparticles (Au NPs) on Fe 3 O 4 nanorings (R–Fe 3 O 4 ) and the formed Au@R–Fe 3 O 4 is further combined with g-C 3 N 4 nanosheets through a simple electrostatic assembly method. The Au@R–Fe 3 O 4 /g-C 3 N 4 nanocomposite presents multifunction of magnetic enrichment, SERS signal enhancement, multiple pollutants analyzing, and photocatalytic activity , which achieves quantitative detection of rhodamine B (RhB), tetracycline hydrochloride (TC), and 4-chlorophenol (4-CP), with detection limits of 5.30 × 10 −9 , 7.50 × 10 −8 , 7.69 × 10 −8 mol/L, respectively. Furthermore, the recyclable detection capability of Au@R–Fe 3 O 4 /g-C 3 N 4 for multi components is demonstrated by the strong SERS signal after 9 cycles of “detection-degradation” processes. Combined with good uniformity and stability, this SERS method based on Au@R–Fe 3 O 4 /g-C 3 N 4 substrate provides a new strategy for the multi-pollutants detection and degradation in water environment.
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ACS Applied Bio Materials
·
2024
·
IF 4.6
Kai Liu,Qi You,Rohil Jawed,Dong Han,Yufei Miao,Xiang Gu,Junming Dong,Christopher J. Butch,Yiqing Wang
Protective masks are critical to impeding microorganism transmission but can propagate infection via pathogen buildup and face touching. To reduce this liability, we integrated electrospun photocatalytic graphitic carbon nitride (g-C3N4) nanoflakes into standard surgical masks to confer a self-sanitization capacity. By optimizing the purine/melamine precursor ratio during synthesis, we reduced the g-C3N4 band gap from 2.92 to 2.05 eV, eliciting a 4× increase in sterilizing hydrogen peroxide production under visible light. This narrower band gap enables robust photocatalytic generation of reactive oxygen species from environmental and breath humidity to swiftly eliminate accumulated microbes. Under ambient sunlight, the g-C3N4 nanocomposite mask layer achieved a 97% reduction in the bacterial viability during typical use. Because the optimized band gap also allows photocatalytic activity under shadowless lamp illumination, the self-cleaning functionality could mitigate infection risk from residual pathogens in routine hospital settings. Both g-C3N4 and polycaprolactone demonstrate favorable biocompatibility and biodegradability, making this approach preferable over current commercially available metal-based options. Given the abundance and low cost of these components, this scalable approach could expand global access to reusable self-sanitizing protective masks, serving as a sustainable public health preparedness measure against future pandemics, especially in resource-limited settings.
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