SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Hao Huang,Hui-Long Wang,Shao-Bo Shi,Wen-Feng Jiang
The degree of molybdate polymerization significantly affects the photocatalytic properties of molybdate-based photocatalysts. However, few studies have focused on this aspect. Herein, novel AgI/Ag n Mo x O 3x+n/2 /g-C 3 N 4 ternary composites were constructed via a facile two-step in - situ synthesis approach. Photocatalytic activity of AgI/Ag n Mo x O 3x+n/2 /g-C 3 N 4 was tested for the degradation of benzotriazole (BTA) in aqueous solution. We illustrated the intrinsic dependence of the band structure, dual built-in electric field, charge transfer mechanism and photocatalytic activity of AgI/Ag n Mo x O 3x+n/2 /g-C 3 N 4 on the degree of molybdate polymerization. Tuning the polymerization degree of molybdate constituent in AgI/Ag n Mo x O 3x+n/2 /g-C 3 N 4 can produce more advantageous band structures and dual built-in electric fields with different directions at the intimate contact interface. The charge transfer mechanism of undergoes a transition from dual type-II to a hybrid of type-II and Z-scheme and then to dual direct Z-scheme with the increase of the degree of molybdate polymerization, which can simultaneously enhance the photocatalytic activity and photostability of the AgI/Ag n Mo x O 3x+n/2 /g-C 3 N 4 ternary heterojunction photocatalysts, achieving the effect of killing two birds with one stone. It was confirmed that AgI/Ag n Mo x O 3x+n/2 /g-C 3 N 4 can be activated by visible light and employed as effective photocatalyst in photocatalytic degradation of BTA.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
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IF 11.2
Tingting Yu,Bing Yang,Rong Zhang,Chenyu Yang,Arramel,Jizhou Jiang
The upsurge of interest in the emergence of photocatalytic fuel cell systems (PFC) presents an efficient and environmentally friendly approach to wastewater treatment. In this work, a Z-scheme coupled with an S-scheme heterojunction electrode was used in the PFC, utilizing TiO 2 /GO/g-C 3 N 4 as the photoanode and BiOAc 1– x Br x /BiOBr as the photocathode. We systematically align the band structures between the anode and cathode, which facilitates the electron transfer between the electrodes. Our attempt successfully demonstrates that collaborative power generation facilitates the high efficiency of tetracycline hydrochloride (TC) degradation at both electrodes. The photoanode achieved a 94.87 % degradation rate for TC, while the photocathode exhibited a 96.33 % degradation rate after 2 h, surpassing pristine BiOBr and BiOAc by factors of ∼5.3 and ∼3.8, respectively. Furthermore, this work proposed a mechanism for electron generation, transport, and pollutant degradation mechanism in the PFC. Intermediate substances generated during the degradation of TC were analyzed through high-performance liquid chromatography-mass spectrometry (HPLC-MS) and ultraviolet photoelectron spectroscopy (UPS), while the optimal degradation pathway was confirmed using density functional theory (DFT). The findings of this work establish the feasibility of efficiently degrading pollutants through PFC treatment, introducing a novel system where various heterojunctions in bipolar materials collaborate with photocatalysis to effectively generate electricity and enhance pollutant removal.
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CARBON
·
2023
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IF 10.9
Linzi Huang,Jiaodi Li,Yilin Wang,Xuan Hu,Kai Shi,Chunyan Li,Yixi Xie,Pengcheng Zhao,Junjie Fei
l -cysteine (L-Cys) plays an important role in human health as well as in the biological environment. Here, a simple physical mixing technique was used to create the p-n heterojunction by homogeneously immobilizing cuprous oxide/copper@microporous carbon (Cu 2 O/Cu@mC) on the surface of a sheet of g-C 3 N 4 (CNS). Among them, the porous structure of Cu 2 O/Cu@mC after heat treatment is favorable for charge storage. Meanwhile, the carbon element in Cu 2 O/Cu@mC acts as a photosensitizer and electron mediator to extend visible light absorption. Compared with bulk g-C 3 N 4 (CNB), the sheet-like structure and high specific surface area of CNS can be used as a carrier for the binding of Cu 2 O/Cu@mC with L-Cys. Based on the interaction between L-Cys and Cu 2 O/Cu@mC through the formation of Cu–S bonds, Cu 2 O/Cu@mC/CNS was proposed as a light-driven enzyme-free photoelectrochemical sensor for the detection of L-Cys. In the best case, the Cu 2 O/Cu@mC/GCE sensor has a low limit of detection of 1.26 × 10 −9 M for L-Cys and a wide linear range (1.0 × 10 −8 M − 4.0 × 10 −6 M). The repeatability, reproducibility, stability, selectivity and specificity of the sensor were satisfactory. In addition, the potential applicability of the proposed photoelectrochemical sensor was evaluated in tap water and human serum.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Diejing Feng,Bingxu Lu,Wenjing Wu,Shenggang Yang,Yukun Sun,Bo Bai,Shijie Li
The regulation of heterogeneous material properties to strengthen the peroxymonosulfate activation to destroy refractory pharmaceuticals remains a challenge. Herein, a promising nitrogen-deficient catalyst (FeCN) with single atom Fe and Fe 2 O 3 nanoparticles dispersing on g -C 3 N 4 matrix was synthesized and applied as a competent peroxydisulfate (PDS) activator for tetracycline (TC) degradation under visible light. The K-edge X-ray absorption fine structures and 57 Fe Mössbauer measurements confirmed the unique configuration of Fe 2 O 3 and single atom Fe active sites (pyrrolic and pyridinic FeN 4 ) induced by the neighbouring nitrogen vacancies. The theory calculations and experiments provided a deep insight into the PDS activation and TC degradation via radical and non-radical pathways. The pyrrolic FeN 4 active sites dominated the electron transfer, while the pyridinic FeN 4 and Fe 2 O 3 decomposed PDS to produce free radicals. The synergistic effect between the Fenton-like oxidation and photocatalysis is responsible for efficient TC degradation. This study offers a new strategy by integrating novel catalysts and advanced oxidation technology for effective wastewater purification.
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BIOSENSORS & BIOELECTRONICS
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2015
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IF 6.409
Xuehui Pang,Jihong Pan,Picheng Gao,Youying Wang,Liguo Wang,Bin Du,Qin Wei
It was reported that Proprotein convertase subtilisin/kexin type 6 (PCSK6) can promote the progression of rheumatoid arthritis to a higher aggressive status. In this work, a novel visible light induced photoelectrochemical (PEC) platform was designed to detect PCSK6 gene. ZnO@CdTe nanocable arrays/carboxylated g-C 3 N 4 used as the PEC signal generator . Hexagonal ZnO nanorods grew on ITO electrode firstly. CdTe were then electrodeposited on the ZnO nanorods surface to enhance the photogenerated h + /e − separation efficiency. Carboxylated g-C 3 N 4 was utilized to improve h + /e − separation efficiency and anchor the capture probes of PCSK6 gene by the covalent bonding effect. The 5′ and 3′ primers captured PCSK6 ssDNA by the specific recognition. The linear range was 10 pg/mL to 20.0 ng/mL with a detection limit of 2 pg/mL.
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PubMed
高影响因子
TALANTA
·
2024
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IF 5.6
Linchun Nie,Liushan Jiang,Shuangying Li,Denghao Song,Guangyu Dong,Lutong Bu,Chunmao Chen,Qingxiang Zhou
Present work reported a novel nanozyme g-C 3 N 4 @Cu, N-CDs with excellent peroxidase-like activity obtained by loading Cu and N co-doped carbon dots on g-C 3 N 4 (graphitic carbon nitride). g-C 3 N 4 @Cu, N-CDs can catalyze H 2 O 2 to generate hydroxyl radical •OH, which oxidizes o -phenylenediamine to 2,3-diaminophenazine, which emits orange fluorescence under ultraviolet light irradiation. The experimental results confirmed that 1,4-benzenedithiol (BDT) could inhibit the peroxidase-like activity of g-C 3 N 4 @Cu, N-CDs. Based the principle above, a colorimetric-fluorescence dual-mode sensor for rapidly sensing of BDT was creatively constructed with assisting of a smartphone. The sensor showed excellent linearity over ranges of 0.75–132 μM and 0.33–60.0 μM with detection limits of 0.32 μM and 0.25 μM for colorimetric and fluorescence detection, respectively. Moreover, a smartphone-assisted colorimetric array sensor was constructed to distinguish six sulfur-containing compounds according to the difference in the degree of inhibition of nanozyme activity by different sulfur-containing compounds. The array sensor could distinguish sulfur-containing compounds at low concentration as low as 0.4 μM. The results validated that the designed sensor was a convenient and fast platform, which could be utilized as a reliably portable tool for the efficient and accurate detection of BDT and the discrimination of multiple sulfur compounds in real water samples.
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ELECTROCHIMICA ACTA
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2018
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IF 5.116
Kané Rabé,Lifen Liu,Noor Ahmed Nahyoon,Yizhen Zhang,Ahmed Mahmoud Idris
Degradation of pollutants can be integrated with electricity generation in Photocatalytic fuel cell under light irradiation or self-powered fuel cell in the dark. In fuel cell driven by electrode reactions , the electrode reduction and oxidation transforms chemical energy in pollutants into electrical energy. In this work, Rhodamine B and coking wastewater were treated, using an efficient Z-scheme g-C 3 N 4 /Fe 0 (1%)/TiO 2 as an anodic catalyst and WO 3 as a cathodic catalyst. After 100 min of reaction in a single chamber fuel cell with 10 Ω of external resistance, in 0.05 M Na 2 SO 4 electrolyte, the paired stainless-steel electrodes loaded respectively with g-C 3 N 4 /Fe 0 (1%)/TiO 2 and WO 3 , degraded 98% Rhodamine B and generated 0.95 V cell voltage under 50 W visible-light irradiation, while removed 60% RhB and generated 0.5 V without light. To investigate the PFC performance of g-C 3 N 4 /Fe 0 (1%)/TiO 2 in treating real coking wastewater, at optimal pH 2, 91% chemical oxygen demand (COD) and 89% total organic carbon (TOC) were removed and generated 0.3 V cell voltage. The influence of pH on photocatalytic degradation performance and cell voltage are evaluated. The high cell voltage is attributed to the very low impedance of the g-C 3 N 4 /Fe 0 (1%)/TiO 2 loaded anode. The excellent electrochemical properties of paired electrodes help in generating higher current density , due to the increased photocatalyst activity of the tridimensional catalyst as proved by electron spinning resonance spectrum, photoluminescence , and Electric Impedance Spectrum analysis.
研究领域:
环境科学
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光催化
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能量转换
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废水处理
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电化学
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材料科学
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Guanshu Zhao,Jing Ding,Jiayi Ren,Qingliang Zhao,Qingwei Gao,Kun Wang,Liangliang Wei,Xueqi Chen,Fanyang Zhou,Dionysios D. Dionysiou
A novel Fe-modified g-C 3 N 4 with rich N vacancies (NVs) under N 2 calcination was developed to active sulfite for the efficient removal of contaminants and bacterial inactivation under visible light (VIS). The degradation rates of VIS/sulfite/Fe/g-C 3 N 4 (N 2 ) for acetaminophen (ACT) were 10.94, 4.88, and 2.85 times higher than those of VIS/Fe/g-C 3 N 4 (N 2 ), VIS/sulfite/g-C 3 N 4 (N 2 ), and VIS/sulfite/Fe/g-C 3 N 4 (CO 2 ), respectively. Escherichia coli (E. coli) with an initial concentration of 2.5 × 10 8 CFU/mL decreased by 6.1 and 8.4 log CFU/mL within 60 min and 80 min of inactivation, respectively. The activation of sulfite led to the generation of oxysulfur radicals, and the consumption of hole (h + ) by sulfite inhibited its recombination with electron (e − ), promoting the formation of superoxide radical ( • O 2 – ). The synergistic effect of Fe, NVs, and g-C 3 N 4 in VIS/sulfite/Fe/g-C 3 N 4 (N 2 ) system promoted the generation of oxysulfur radicals. Density functional theory (DFT) calculations indicated that NVs facilitated charge transfer from Fe to g-C 3 N 4 substrate, accelerating the Fe 3+ /Fe 2+ and oxysulfur radical cycles. Fe/g-C 3 N 4 with rich NVs exhibited lower adsorption binding energy, faster charge transfer, and longer S-O bond length than pristine Fe/g-C 3 N 4 during sulfite adsorption. This work unraveled the synergistic mechanism of Fe, NVs, and g-C 3 N 4 , which provides new insights into heterogeneous photocatalysts on sulfite activation for water treatment.
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JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Lin Wang,Qiya Sun,Yicheng Dou,Zhipeng Zhang,Tingting Yan,Yongmei Li
A novel ternary recyclable Fe 3 O 4 /graphene/sulfur-doped g-C 3 N 4 (Fe 3 O 4 /GE/SCN) composite catalyst was synthesized and adopted in a visible-light driven catalytic system for the degradation of ranitidine, which is an important precursor of the emerging disinfection by-product of N-nitrosodimethylamine (NDMA). The addition of GE and Fe 3 O 4 significantly improved the interface charge transfer of SCN, increased the light collection efficiency and decreased the photogenerated charge recombination efficiency. Considering both the ranitidine removal efficiency and catalyst recovery, the Fe 3 O 4 mass fraction of 20% (20%-Fe 3 O 4 /GE/SCN) was recommended. Ranitidine (≤ 2 mg/L) was completely removed in 60 min under the conditions of an initial pH of 7.0 and a 20%-Fe 3 O 4 /GE/SCN dose of 1.0 g/L, and its degradation fitted well with the pseudo first-order kinetics model. Electron paramagnetic resonance analysis and trapping experiments confirmed that ·O 2 − , ·OH and h + participated in the degradation of ranitidine. Ranitidine was removed through the pathways of demethylation and hydroxylation based on the analysis of the detected degradation intermediates, and 57.3% of the NDMA formation potential (FP) was reduced after the reaction. The visible-light driven 20%-Fe 3 O 4 /GE/SCN catalytic technology is a promising method not only for the control of NDMA FP but also the catalyst could be recovered and reused.
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高影响因子
Materials Today Nano
·
2026
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IF 7.6
Liangyun Yu,Lingling Huang,Rui Na,Meng Yuan,Zhaoyong Luo,Qi Zhang,Baocai Xu,Qin Xu
Developed crystal phase-tunable Cu-TiO 2 @g-C 3 N 4 with excellent photoelectric property. • Synergistic MIP-heterojunction system enabled efficient recognition of DOP. • The DOP sensor exhibited a very wide linear range and a femtomolar detection limit. • The new sensor has been successfully applied to detect DOP in the real samples. Di-n-octyl phthalate (DOP), a pervasive endocrine-disrupting contaminant in food packaging, plastic products, and aquatic systems, poses severe threats to ecosystem stability and human health. This work proposed a novel molecularly imprinted polymer (MIP)-integrated photoelectrochemical (PEC) sensing strategy for ultra-selective detection of DOP based on a rationally designed crystal phase tunable Cu 2+ -doped TiO 2 @g-C 3 N 4 composite. By lattice-doping TiO 2 with Cu 2+ to generate impurity energy levels, it was possible to precisely tune its band structure and narrow its bandgap. Subsequently, the obtained Cu-TiO 2 was hybridized with two-dimensional g-C 3 N 4 through energy-level matching, forming a tightly coupled structure at the heterojunction, which had strong interactions and thus opened up directional charge separation and transport channels. The precisely controlled heterogeneous and interfacial properties of the Cu-TiO 2 @g-C 3 N 4 matrix were confirmed through characterization methods such as SEM, TEM, HRTEM, XPS and XRD. The fabricated sensor achieved an extremely wide linear detection range of 10 fM to 1 nM, with an ultra-low limit of detection down to 5.30 fM, alongside exceptional anti-interference capability and practical reliability in real sample assays. This study delivered a low-cost, easily miniaturized PEC-MIP platform for trace DOP monitoring, opening up a new high-performance approach for on-site food safety screening and environmental water quality assessment.
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ANALYTICAL CHEMISTRY
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2023
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IF 7.4
Xu Zhang,Chaochen Sun,Ruiling Li,Xin Jin,Yongning Wu,FengFu Fu
Enzyme mimics now play a significant role in biochemistry. Especially, peroxidase mimics have been widely used for developing colorimetric sensors of blood glucose. The peroxidase mimics previously reported could not be recycled for reusing and may generate scattering to cause unwanted optical interference when it was used for fabricating colorimetric sensors. We herein prepared a broad-applicable and reusable magnetic enzyme-loading nanoplatform with enhanced peroxidase-like activity by simultaneously loading Fe3O4 nanoparticles (Fe3O4NPs) and palladium nanoparticles (PdNPs) on graphitic carbon nitride (g-C3N4) nanosheets (Fe3O4NPs/PdNPs/g-C3N4). The prepared Fe3O4NPs/PdNPs/g-C3N4 possesses stable and enhanced peroxidase-like activity and good enzyme-loading capacity and can be used to load various natural enzymes to form highly-efficient and stable double-active nanozyme for fabricating colorimetric sensors for the visual detection of small molecules. Especially, the magnetic feature facilitates the magnetic separation of Fe3O4NPs/PdNPs/g-C3N4 from sample solution, which is in favor of recycling and eliminating the optical interference caused by nanozyme in colorimetric sensors. The prepared Fe3O4NPs/PdNPs/g-C3N4 has been successfully used to load glucose oxidase (GOx) and cholesterol oxidase (Chox) to form magnetic peroxidase-GOx and peroxidase-Chox double-active nanozymes, which can be used to fabricate colorimetric methods for the detection of glucose and cholesterol, respectively, with a visual detection limit of 15 μM and a spectrometry detection limit of 1.0 μM. With the developed glucose and cholesterol detection methods, we have successfully detected glucose and cholesterol in serum with a recovery of 98–104% and a RSD (n = 5) < 5%. With high peroxidase-like activity, good stability, reusable features, and broad applicability of loading enzyme, the developed magnetic Fe3O4NPs/PdNPs/g-C3N4 provided a promising approach for fabricating cost-effective, sensitive, and simple colorimetric sensors for the visual detection of various small molecules.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Wisal Muhammad,Nazma Faqir,Muhammad Asif Khan,Zaheen Ullah Khan,Bilal Ahmad,Muhammad Jawad Ahmad,Amir Zada,Fawad Ali,Sajid Nadeem,Muhammad Zaka Ansar,Wajid Ali
Developing an efficient visible-light-driven photocatalysts for conversion of atmospheric CO 2 into valuable fuels is a promising strategy to mitigate the escalating greenhouse gas, environmental, and energy crisis. This study presents an innovative design for a cascade Z-scheme comprising of dimensional matched SnO 2 -α-Fe 2 O 3 /g-C 3 N 4 (SO-FO/CN) nanosheets heterojunction. In this configuration, SnO 2 functions as an optimal energy platform that not only facilitates charge transfer and separation but also sustains sufficient thermodynamic energy for redox reactions and inhibits the undesired type-II charge transfer pathway. The optimized cascade Z-scheme exhibits a remarkable 20-fold improved photoactivity for CO 2 conversion to CH 4 and CO compared to bare g-C 3 N 4 (CN). It also shows significantly improved photocatalytic activity for the degradation of toxic organic pollutants, 2,4-dichlorophenol (2,4-DCP) ∼6.6-fold and bisphenol A (BPA) ∼4.2-fold, respectively. The improved photocatalytic activity results from effective charge separation facilitated by the Z-scheme, along with a favorable energy platform and extended charge lifetime. This innovative strategy, which utilize an energy platform, presents a promising approach for designing an efficient Z-scheme heterojunction photocatalysts for solar-to-fuel conversion and pollutant degradation.
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高影响因子
危险品化学品经营许可证（带存储）