MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Shengjie Gao,Xuanxuan Liu,Lili Yao,Hui Zhang,Zhiwen Guan,Chuanlong Men,Yu Mao,Lu Wang,Lei Zheng
Developed a high-annealing-temperature PCR-assisted GO-SELEX screening strategy. • Enriched GC-rich sequences with strong G-quadruplex folding potential. • Identified a Pb 2+ -specific G4 aptamer Pb-GC-1 with high affinity and selectivity. • Constructed a Pb 2+ -responsive G4 allosteric colorimetric biosensor. • Achieved 10 nM detection limit and high recovery in real food sample testing. Heavy metal pollution, particularly from lead, poses a severe threat to global food safety. We present a novel G-quadruplex (G4) aptamers screening strategy based on high-annealing-temperature PCR-assisted graphene oxide-SELEX (HAT-GO-SELEX) for efficient development of highly specific and sensitive probes targeting Pb 2+ . By systematically elevating the PCR annealing temperature during selection, we enriched sequences with high GC content and structural stability. Analysis of the top 100 candidate sequences from high-throughput sequencing revealed significant enrichment of G-tracts, with 20% consensus G4 formation potential across multiple prediction algorithms. A Pb 2+ -specific G4 aptamer, Pb-GC-1, exhibited high affinity ( K d = 167 nM) and strong specificity. A colorimetric biosensor based on Pb 2+ -induced G4 allosteric switching enabled sensitive detection in real food samples, achieving a detection limit of 10 nM and recoveries of 96.7–102.0%. This work presents an efficient strategy for screening functional G4-based aptamers, advancing the development of rapid detection platforms for heavy metal contaminants. Download: Download high-res image (136KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
ChemPhotoChem
·
2025
·
IF 3
Yuan Bai,Jie Liu,Weiting Huang,Xintong Shen,Haoyu Zheng,Kexin Hu
Graphical Under visible light, a Z-type heterojunction is formed between Ti 3 C 2 /TiO 2 and g-C 3 N 5 to enhance charge separation. Electrons and holes directly or indirectly react with PMS to generate free radicals such as · ,·OH, and 1 O 2 to degrade tetracycline. Photocatalysis-assisted peroxymonosulfate (PMS) activation is a promising technology for the degradation of antibiotics in water remediation. Herein, MXene-derived oxide (TiO 2 ) and g-C 3 N 5 Z-scheme ternary heterojunction photocatalytic composite materials are synthesized using an electrostatic self-assembly approach and characterized. The optimized g-C 3 N 5 /TiO 2 /Ti 3 C 2 (CNTT) heterostructure demonstrates exceptional photocatalytic activity for tetracycline (TC) removal, achieving 90% degradation within 60 min at an optimal g-C 3 N 5 :TiO 2 /Ti 3 C 2 mass ratio of 3:2. Remarkably, the system exhibits broad pH adaptability (80.8–96.3% TC removal across pH 2–12), overcoming the pH sensitivity limitations of traditional PMS-based processes. Mechanistic investigations reveal a synergistic photocatalysis-PMS activation pathway, with quenching experiments confirming , ·OH, · , and 1 O 2 , as dominant reactive species. The CNTT composite maintains 65.2% degradation efficiency after five cycles, demonstrating robust stability. Coexisting ions negatively influence TC removal in the order: H 2 PO 4 − > > Cl − > > . This work establishes the CNTT heterostructure as a promising, environmentally tolerant candidate for efficient pharmaceutical pollutant remediation in complex aqueous matrices.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Long Bai,Yifei Chen,Xuedi Wu,Nan Chang,Ren Li,Zhi Yao,Weiping Li
In this study, a series of g-C 3 N 4 /BiOBr S-scheme heterojunction photocatalysts with varying BiOBr contents were synthesized via an in-situ hydrothermal strategy. The optimized composite, CB-15 (15 wt% BiOBr), exhibited a remarkable hydrogen evolution rate of 1925.9 μmol g −1 h −1 under visible light, significantly surpassing those of pristine g-C 3 N 4 and BiOBr. Comprehensive characterizations revealed enhanced light absorption, expanded surface area, improved surface wettability, interfacial coupling, and electrochemical active surface area (ECSA) as confirmed by water contact angle, in situ XPS, and CV measurements. Photophysical analyses and femtosecond transient absorption spectroscopy provided further insights into the charge transfer mechanism, supporting the conclusion that g-C 3 N 4 and BiOBr form a direct S-type heterojunction structure. Density Functional Theory calculations validated this mechanism, revealing enhanced interfacial charge redistribution and a reduced Gibbs free energy barrier for hydrogen evolution. Electron Paramagnetic Resonance analysis showed the co-generation of •O 2 − and •OH radicals, aligning with the proposed S-scheme pathway. This work provides a comprehensive strategy for the rational design of high-performance photocatalysts for solar-driven hydrogen production.
✓ 已验证
DOI
高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2024
·
IF 2.1
Yufei Zhang,Sile Liu,Chuan Tian,Peng Xu,Xinzhong Deng,Congna Lv
To solve the pollution of natural water bodies by organic dyes and the exceeding of indoor HCHO standards caused by renovation, the study realized the band gap modulation of g-C3N5, a novel semiconductor photocatalytic material, by using H3BO3 as a source of nonmetallic B. The prepared B/g-C3N5 has shown excellent photocatalytic performance and stability for organic dye degradation in water bodies and indoor HCHO removal. The degradation rate of methylene blue (MB) reached 95% in 60 min of visible light, and the removal rate of HCHO reached 96.3% in 180 min of visible light. The MB and HCHO were efficiently degraded to small molecule inorganic compounds such as CO2 and H2O under the oxidation of active groups such as ·O2− and h+. The doping of nonmetallic B realizes the efficient separation of e−-h+ of g-C3N5, improve the absorption performance of visible light, and broaden the spectral range significantly. The modulation of the g-C3N5 band gap provides a potential application scenario for the development of novel photocatalytic materials.
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 84
·期 9
·2541-2556
·
IF 1.915
Tong Yujia,Ding Wenlong,Shi Lijian,Li Weixing
Ultrafiltration membranes are widely used for the treatment of papermaking wastewater. The antifouling performance of polyvinylidene fluoride (PVDF) ultrafiltration membranes can be improved by changing the hydrophilicity. Here, a novel amphiphilic copolymer material, PVDF grafted with N-isobutoxy methacrylamide (PVDF-g-IBMA), was prepared using ultraviolet-induced Cu(II)-mediated reversible deactivation radical polymerization. The amphipathic copolymer was used to prepare ultrafiltration membrane via NIPS. The prepared PVDF-g-IBMA ultrafiltration membrane was estimated using 1 H NMR, FT-IR, and DSC. The contact angle, casting viscosity, and the permeation performance of the PVDF-g-IBMA ultrafiltration membrane were also determined. The pure water flux, bovine serum albumin removal rate, and pure water flux recovery rate of the PVDF-g-IBMA ultrafiltration membrane were 432.8 L·m −2 ·h −1 , 88.4%, and 90.8%, respectively. Furthermore, for the treatment of actual papermaking wastewater, the chemical oxygen demand and turbidity removal rates of the membrane were 61.5% and 92.8%, respectively. The PVDF-g-IBMA amphiphilic copolymer ultrafiltration membrane exhibited good hydrophilicity and antifouling properties, indicating its potential for treating papermaking wastewater. A novel amphiphilic copolymer PVDF-g-IBMA prepared by UV-induced RDRP. Good hydrophilic and anti-fouling properties of PVDF-g-IBMA copolymer UF membrane. The MWCO, BSA rejection rate and pure water recovery ratio were 43.7 kDa, 88.4% and 90.8%, respectively. For treating actual papermaking wastewater, the COD removal rate reached 61.5%.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Wenqiang Deng,Linfeng Xiao,Yingxin Zhang,Boyu Liang,Yan Hong,Runrun Li,Zhengyuan Zhou,Runhua Liao,Guangzhi Hu
In this study, Lanthanum ions (La 3 + )-doped BiOBr/g-C 3 N 5 (La 3+ @BiOBr/g-C 3 N 5 ) Z-scheme heterojunction photocatalyst was successfully synthesized via a facile solvothermal method. The composite structure was thoroughly characterized by XRD, FTIR, XPS, SEM, TEM, UV-Vis DRS, PL, and EIS analyses, confirming the successful incorporation of La 3+ into the BiOBr lattice and the effective integration of g-C 3 N 5 . The optimal composite with 5 wt% g-C 3 N 5 demonstrated superior photocatalytic performance in degrading tetracycline hydrochloride (TCH), achieving a removal efficiency of 95.9% within 180 min under visible light irradiation. The enhanced activity is attributed to the synergistic effects of increased specific surface area, improved visible light absorption, and more efficient photogenerated charge separation, as facilitated by La 3+ doping and Z-scheme charge transfer pathways. Scavenger experiments and Mott-Schottky analysis indicated that superoxide radicals (•O 2 - ) and photogenerated holes (h + ) are the main reactive species responsible for pollutant degradation. Furthermore, the composite exhibited excellent stability and reusability, maintaining over 87% degradation efficiency after five consecutive cycles with minimal structural change. This work provides a promising strategy for the design of high-efficiency rare-earth-modified photocatalysts for antibiotic pollutant removal in wastewater treatment applications.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Mingfu Li,Pingjun Zhang,Jiannan Qin,Hao Cheng,Qian Yu,Liqun Jiang
Photocatalysis has demonstrated great potential in the conversion of biomass, but the design of single-atom photocatalysts for the selective upgrading of glucose is rarely achieved. Here, we report a manganese doped g-C 3 N 4 (Mn SA -CN) single-atom photocatalyst by the impregnation-pyrolysis method, which achieves 34.6% glucaric acid (GAA) yield and 72.6% glucose conversion. Physicochemical characterizations indicate that the atomically dispersed Mn N 4 sites serve as the key catalytic centers, which not only optimize the electronic structure by narrowing the band gap, but also significantly promote the separation of photo-generated charge carriers. Additionally, the free radical scavenging experiments indicated that the hydroxyl radical is the main species for promoting the photocatalytic conversion of glucose. Furthermore, the GAA yield maintained over 33.0% after the catalyst was recycled five times. DFT calculation reveals that the Mn N 4 coordination structure increases the glucose adsorption and electron transfer, thereby reducing the overall reaction energy barrier and promoting the photocatalytic synthesis of GAA. This work offers fundamental insights at the atomic level for the rational design of single-atom photocatalysts toward sustainable biomass conversion.
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 9
·1043
·
IF 4.501
Shuang Tang,Yang-Sen Xu,Wei-De Zhang
Molecular skeleton modification has become a recognized method that can effectively improve the photocatalytic performance of g-C3N4because it not only effectively promotes charge separation, but also tunes the conjugated system of g-C3N4to make it more conducive to photocatalytic reaction. Herein, thiophene-amide embedded g-C3N4(TA-CN-x) was successfully prepared by simple one-step thermal polycondensation using urea as a precursor and ethyl-2-amino-4-phenylthiophene-3-carboxylate (EAPC) as an additive. After embedding with thiophene-amide, the induction and delocalization effects are formed in TA-CN-x, which significantly improves the migration efficiency of photogenerated charge carriers. Meanwhile, the conjugate structure is changed due to structural modification, resulting in significant enhancement of visible light absorption compared to the pure g-C3N4(CN). Specifically, the optimized photocatalytic H2evolution rate of TA-CN-2 reaches 245.4 μmol·h−1, which is 8.4 times that of CN (with Pt nanoparticles as a co-catalyst), and the apparent quantum efficiency (AQY) at 450 nm is 13.6%. This work opens up a new modification process for fully tapping the photocatalytic hydrogen absorption potential of g-C3N4-based materials.Keywords:photocatalysts;g-C3N4;thiophene-amide;embedding;induction effect;delocalization effect;hydrogen evolution
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2023
·
IF 4.1
Shirong Kang,Hongjie Zhu,Linhua Wang,Xiaoyan Zhao,Xianqiang Huang,Hua Yang,Mingyu Dou,Dacheng Li,Jianmin Dou
Tetracycline, a class of micropollutants, is pharmaceutically active compound which cannot be disintegrated borrowing routine treatment methods. Herein, the nano-heterostructures with strong hydrophilicity were obtained via the intervention from acetonitrile and methanol double solvent system at the room temperature. Specifically, the hydrophilic sulfur-impregnated g-C 3 N 4 coupled with 1 dimensional CeO 2 were designed for enhancing dispersity and photocatalytic activity , the results of optical properties demonstrated sulfur-impregnated samples and composites expressed the low recombination of photogenerated carriers compared to the pristine material in that the newborn N–S bonding, which was confirmed via the density functional theory computation and X-ray photoelectron spectroscopy. In this work, the impregnation strategy adopted amplified the hydrophilicity of the material, which had reference significance for the study of hydrophilic and hydrophobic regulation of nanomaterials . Besides, the photodegradation mechanism and pathway of TC was investigated via the results of radical quenching experiment and mass spectrometry analysis , respectively. This study provided a reference for the fertilization modification of intrinsic semiconductor materials under the mixed solvent system and it was contributed to the photodegradation study of TC similarly.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2023
·
IF 3.3
Wen Wu,Xia Hu,Zhen Zeng,Di Wu,Hanmei Li,Hui Li
Sorafenib (Sor) is a multitarget kinase inhibitor used clinically to treat hepatocellular carcinoma and renal cancer. In this study, the interaction mechanism of Sor with c-MYC G-quadruplexes (G4) was investigated at the molecular level by computer-aided means and experiments. Molecular docking results predicted the binding of Sor to the groove of G4. Molecular dynamics (MD) simulations were used to evaluate the effect of ligand binding to G4. Ultraviolet (UV), fluorescence spectroscopy, and viscosity experiments showed that the binding site was in the groove. The UV and fluorescence titration results showed that compared with traditional G4 ligands represented by compound meso-tetra (N-methyl-4-pyridyl) porphine (TmPyP4), Sor has a lower affinity for G4. Likewise, results from fluorescence resonance energy transfer (FRET) experiments suggested that Sor could have a limited ability to stabilize G4, but it was not as prominent as that of TmPyP4. Time-resolved fluorescence spectroscopy again supported the results from steady-state fluorescence spectroscopy, indicating that a static quenching mechanism mainly drove the process. Studying the interaction mechanism of Sor and c-MYC may inspire the screening of new, selective c-MYC G4 ligands and provide ideas for the design of drugs with good stability, low toxicity, and specific targeting of G4.
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Sheng-Zhe Zhao,Ran Lu,Yi Yang,Yun Lu,Raul D. Rodriguez,Jin-Ju Chen
Photocatalysis has a broad prospect for generating H 2 and reactive oxygen species . In this study, porous nanotubular g-C 3 N 4 /TiO 2 photocatalysts were obtained via electrospinning combined with an innovative vapor deposition approach. The waste foam was used as the precursor material for TiO 2 nanotubes , reducing production cost and benefiting resource recovery. The modification of g-C 3 N 4 onto TiO 2 nanotubes provided extensive active sites with an increased specific surface area and produced the heterojunction to improve charge separation. The g-C 3 N 4 /TiO 2 nanotubes displayed remarkable photocatalytic effects in the degradation of organic dye with a removal efficiency of 93.4% and H 2 evolution reaction performing at 4122 μmol·g −1 ·h −1 under simulated sunlight. Photocatalytic activation product analyses and density functional theory (DFT) calculations demonstrated a possible photogenerated carriers transfer pathway. This work provides a way to prepare multifunctional porous nanotubes using a facile synthesis method from abandoned resources with implications for environmental remediation and hydrogen generation.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Rongping Xu,Jinlong Li,Guozhe Sui,Yan Zhuang,Dongxuan Guo,Ze Luo,Shuang Liang,Hong Yao,Chao Wang
The construction of heterojunctions is considered as an effective strategy to boost catalytic degradation activity of photo-Fenton catalyst. Herein, a series of CdS@CuS/g-C 3 N 4 (CC-x/CN) heterojunctions have been successfully prepared by hydrothermal and cation exchange process, which have been applied for the removal of methyl orange (MO) via photo-Fenton process. The results demonstrate that the exchange of Cu 2+ for Cd 2+ on g-C 3 N 4 could inhibit the aggregation of CdS@CuS and increase the light absorption range and the active sites. Under visible light illumination, CC-10/CN (molar ratio of CuS to CdS is 10%) exhibits the optimal photo-Fenton-like catalytic performance with the degradation efficiency of 96% towards MO (40 mg L −1 ) and the total organic carbon removal rate of 75% within 35 min illumination. The apparent reaction rate constant of CC-10/CN (0.088 min −1 ) is approximately 22 and 6.29 times higher than those of pure g-C 3 N 4 and CdS@CuS (molar ratio of CuS to CdS is 10%), respectively. The enhanced photo-Fenton catalytic activity of CC-x/CN is mainly ascribed to the formation of the photo-Fenton effect between CC-10 and g-C 3 N 4 , which promotes the conversion and recycling of Cu 2+ and Cu + . Meanwhile, the successful formation of the heterojunctions reduces the recombination rate of carriers. In addition, the cycling experiments demonstrate that CC-10/CN possesses favorable stability and recoverability. Overall, the well-designed CC-x/CN heterojunctions reveal desirable potential application in the effective treatment of sewage via photo-Fenton process.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）