NANOTECHNOLOGY
·
2024
·Vol. 35
·期 15
·155402
·
IF 2.9
Wei Zhang,Xing Zhang,Lina Zhang,Jinwen Ma,Xiaotong Yin,Yuxin Tian,Chuang Wang,Qiushi Wang
A novel 3D hierarchical TiO2/CaIn2S4/C3N4 arrays with dual heterojunctions photoanode is constructed by stepwise deposition of CaIn2S4 nanosheets and ultrathin C3N4 onto the well-aligned TiO2 nanorods arrays. Integrating the merit of the superior ability of CaIn2S4 and C3N4 to harvest visible light, dual type-Ⅱ heterojunction band structure and one-dimensional ordered nanostructures, the TiO2/CaIn2S4/C3N4 photoanode exhibits simultaneous significant improvements in visible-light harvesting, charge separation and electron transfer capability. At 1.23 V (versus reversible hydrogen electrode) under AM 1.5 G irradiation, the TiO2/CaIn2S475/C3N4 photoanode exhibits a photocurrent density of 4.5 mA cm−2, which is 5.2 and 51.1-fold higher than that of TiO2/CaIn2S475 and pristine TiO2 photoanode, respectively. Moreover, the applied bias photo-to-current efficiency (ABPE) of the TiO2/CaIn2S475/C3N4 photoanode reaches 3.5% at 0.36 V (versus reversible hydrogen electrode). These results are helpful for fabricating more efficient heterostructure photoelectrodes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2024
·
IF 5.9
Qianyu Xu,Haoyang Fu,Jiyuan Gu,Liyu Lei,Lan Ling
The overuse of antibiotics and antitumor drugs has resulted in more and more extensive pollution of water bodies with organic drugs, causing detrimental ecological effects, which have attracted attention towards effective and sustainable methods for antibiotics and antitumor drug degradation . Here, the hybrid nanomaterial (g-C 3 N 4 @Fe/Pd) was synthesized and used to remove a kind of both an antibiotic and antitumor drug named mitoxantrone (MTX) with 92.0% removal efficiency, and the MTX removal capacity is 450 mg/g. After exposing to the hybrid material the MTX aqueous solution changed color from dark blue to lighter progressively, and LC-UV results of residual solutions show that a new peak at 3.0 min (MTX: 13.2 min) after removal by g-C 3 N 4 @Fe/Pd appears, with the simultaneous detection of intermediate products indicating that g-C 3 N 4 @Fe/Pd indeed degrades MTX. Detailed mass spectrometric analysis suggests that the nuclear mass ratio decreased from 445.2 (M + 1H) to 126.0 (M + 1H), 169.1 (M + 1H), 239.2 (M + 1H), 267.3 (M + 1H), 285.2 (M + 1H), 371.4 (M + 1H) and 415.2 (M + 1H), and the maximum proportion (5.63%) substance of all degradation products (126.0 (M + 1H)) is 40-100 times less toxic than MTX. A mechanism for the removal and degradation of mitoxantrone was proposed. Besides, actual water experiments confirmed that the maximum removal capacity of MTX by g-C 3 N 4 @Fe/Pd is up to 492.4 mg/g (0.02 g/L, 10 ppm).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yue An,Yiwei He,Mingtao Li,Wenying Yu,Na Tian,Yihe Zhang,Hongwei Huang
Graphitic phase carbon nitride (g-C 3 N 4 ) is considered one of the most promising catalysts for photocatalytic production of hydrogen peroxide (H 2 O 2 ) due to its green and non-polluting nature and stability. However, the conventional g-C 3 N 4 prepared by direct thermal polymerization has insufficient reaction sites due to its excessive bulk defects derived from incomplete polymerization and low specific surface area, leading to rapid carrier recombination and limited photocatalytic activity. In this work, a series of crystalline g-C 3 N 4 (CN-UxM) with large specific surface areas have been prepared by a molten salt post-treatment strategy with regulating the precursor ratio of urea to melamine . In-situ KPFM, photoelectrochemical experiment and DFT calculation results show that the sample with an optimized urea/melamine ratio of 20 (CN-U20M) has the highest charge separation and transfer efficiency derived from the internal electric field. And its H 2 O 2 production rate under simulated visible light reaches as high as 10.94 mmol∙g −1 ∙h −1 , far exceeding that of most g-C 3 N 4 -based photocatalysts in reported literatures. The present work provides an effective strategy to enhance the photocatalytic activity of g-C 3 N 4 , which is expected to be applied to other organic semiconductor catalytic systems.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hao Yang,Li Han,Dongrui Hou,Yongchang Liu,Shuaijun Huang,Zirui Peng,Zirui Yang,Tianliang Lu,Xiaoqin Si,Xin liu,Jinrong Li,Jianfeng Wang
A series of S-scheme heterojunctions, XCN@MoO 3 (XCN@M, X = Cl, Br, I), were synthesized via a simple thermal polymerization, and the effect of halogen doping on construction of S-scheme heterojunctions was systematically explored. The ICN@M heterojunction showed exceptional photocatalytic performance, achieving 100 % degradation of 50 mg/L RhB in 90 min, 40.37 times and 2.34 times higher than pure g-C 3 N 4 and CN@M, respectively. Notably, ICN@M outperformed CN@M and some other photocatalysts reported. DFT result revealed halogen doping reduced the work function of CN, proved the maximum work function difference of ICN@M and the formation of the strongest built-in electric field between the surface of MoO 3 with an electron-rich region and the surface of ICN with a hole-rich region, thus facilitating electron transfer at the heterojunction interface, reducing recombination of photogenerated carriers and promoting the catalytic performance. Fukui function and frontier orbital theory identified a possible degradation pathway of RhB dominated by ∙O 2 – and 1 O 2 and the toxicity of final products during the photocatalysis degradation of RhB was evaluated. This work highlighted the importance of work function differences in designing photocatalyst heterostructures and offered a new option for environmental treatment.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Lingyu Zhang,Yuhao Yang,Nan Zhao,Shuang Liu,Zhe Wang,Xiangke Wang,Yuexiang Lu
Photocatalytic reduction of uranium from U(VI) to U(IV) is an effective method to remove uranium from wastewater, while it often requires anaerobic conditions and/or the addition of sacrificial agents, which hindered its further application. Herein, MOF modified C3N4 composite material was prepared for uranium removal under air atmosphere without the addition of sacrifices, achieving a notably uranium removal capacity of 1355 mg/g. The introduction of MOF enhanced the band structure and the photoelectric properties of C3N4, making it able to generate and separate electrons and holes efficiently. The electrons were applied to reduce O2 to form H2O2 and the holes could oxidize H2O to O2. The generated H2O2 could react with UO22+ to form (UO2)O2.2H2O to realize the solidification of uranium under both air and N2 atmosphere. This work may give new direction of the design of photocatalysts for highly efficient uranium removal under air atmosphere without sacrificial agent.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zia Ur Rehman,Muhammad Bilal,Faheem K. Butt,Sajid Ur Rehman,Zeeshan Asghar,Kewang Zheng,Yongcai Zhang,Xiaoyong Xu,Jianhua Hou,Xiaozhi Wang
Graphitic carbon nitride is a promising photocatalyst to address environmental issues and energy applications. Herein, we develop an efficient defect-containing functionalized system of 2D selenium doped g-C 3 N 4 porous nanosheets via one pot with two-step temperature for the first time. During heat treatment, Se-infused g-C 3 N 4 nanosheets loosen stacking and form thinner nanosheets , which could effectively shorten the electronic path of charge migration. The introduction of nitrogen vacancies creates a midgap energy state below the CB, which improves the light-harvesting efficiency. Moreover, the dual effect of N vacancy and Se doping provides a driving force for the dissociation of excitons and achieves an effective spatial charge separation. High specific surface area (104.1 m 2 /g), suitable bandgap (2.65 eV), and good photocurrent response (0.45 µA cm −2 ) help to enhance the photocatalytic efficiency of 1-SeCN remarkably. Henceforth, high photocatalytic H 2 production rate of 5441 µmol g −1 h −1 and CO evolution rate of 31.5 µmol g −1 h −1 verifies the effective Se doping enhances the photocatalytic efficiency of g-C 3 N 4 . Furthermore, DFT calculations are consistent with experimental results and this facile engineering strategy provides a scalable way to develop a novel, efficient g-C 3 N 4 -based photocatalyst for H 2 production and CO 2 reduction.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hao Ma,Chunyan Huang,Tianqi Tan,Wenting Li,Wei Xu,Yu Shen,Yuhan Li,Ruimei Fang,Fan Dong
Photocatalytic technology is of great significance in environmental purification due to its eco-friendly and cost-effective operations. However, low charge-transfer efficiency restricts the photocatalytic activity of the catalyst. Herein, we report Cs 2 SnBr 6 /C 3 N 4 composite catalysts that exhibit a robust interfacial electron exchange thereby enhancing photocatalytic nitric oxide (NO) oxidation . A comprehensive study has demonstrated the S-scheme electron transfer mechanism. Benefiting from the interfacial internal electric field , the C-Br bond serves as a direct electron transfer channel, resulting in enhanced charge separation. Furthermore, the S-scheme heterojunction effectively traps high redox potential electrons and holes, leading to the production of abundant reactive oxygen radicals that enhance photocatalytic NO abatement. The NO removal rate of the Cs 2 SnBr 6 /C 3 N 4 heterogeneous system can reach 86.8 %, which is approximately 3-fold and 18-fold that of pristine C 3 N 4 and Cs 2 SnBr 6 , respectively. The comprehensive understanding of the electron transfer between heterojunction atomic interfaces will provide a novel perspective on efficient environmental photocatalysis .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hongwu Liao,Chong Wang,Jiaxian Zheng,Zhuo Chen,Yulin Zhou,Chengning Ye,Xiangfeng Lin,Meng An,Yusuke Yamauchi,Yusuke Asakura,Zhanhui Yuan
Photocatalytic depolymerization of lignin offers a sustainable approach to producing high-value-added aromatic compounds. Recently, carbon nitride has demonstrated notable selectivity for the C C bonds in lignin model compounds. However, limitations of pure carbon nitride include the low mobility of photogenerated electrons and the difficulty in precisely controlling the cleavage pathways and products of C C bonds. In this study, we constructed an S-Scheme heterojunction by in situ loading of Ce ions onto C 3 N 4 to form a CeO 2 /C 3 N 4 composite. This heterojunction achieves efficient lignin depolymerization under blue LED irradiation in an oxygen-rich environment. Comparative analysis indicated that the yield of primary products, benzaldehyde and phenyl formate, increased by 7.8-fold and 7.75-fold, respectively, compared with pure CeO 2 , and by 1.4 and 1.8 times relative to unmodified C 3 N 4 . After optimizing the reaction conditions, dealkalized lignin is applied to the system and successfully depolymerized. Comprehensive characterization and theoretical simulations verify the heterojunction's ability to enhance carrier separation and redox activity, with CeO 2 serving as an active dehydrogenation site that significantly boosts the depolymerization efficiency of lignin model compounds. This photocatalytic strategy presents a valuable step forward in lignin valorization and supports the sustainable utilization of biomass resources.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Jian Zhang,Chen Shao,Zhen Lei,Yuanchun Li,Haina Bai,Lanhe Zhang,Guangqin Ren,Xinyan Wang
Due to inherent limitations such as high carrier recombination efficiency, limited active sites, and suboptimal utilization of visible light, graphite-like carbon nitride (g-C 3 N 4 ) has constrained its widespread application in water treatment within photocatalytic systems. In addressing this issue, the present study employed acid etching and sonochemistry to fabricate a Ti 3 C 2 -SO 3 H/g-C 3 N 4 (TiCSOHCN) composite photocatalyst for the removal of tetracycline hydrochloride (TC). The amalgamation of Ti 3 C 2 -SO 3 H (TiCSOH) with g-C 3 N 4 engendered the establishment of a discernible Schottky barrier, facilitating an expedited electron transfer rate. Photocatalytic degradation experiments demonstrate that, compared to individual components, the TiCSOHCN composite photocatalyst exhibits significantly enhanced photocatalytic activity. The removal efficiency of TC reaches 75.42% within 2 h, and even after five cycles of experimentation, the degradation efficiency remains close to 70%, indicating excellent stability. The augmentation can be predominantly ascribed to the cooperative influence arising from the synergy between Ti 3 C 2 -SO 3 H and g-C 3 N 4 . The augmentation of visible light responsiveness in g-C 3 N 4 , achieved through its modification with TiCSOH, resulted in the mitigation of photoelectron-hole pair recombination, consequently leading to an amelioration in the photocatalytic efficacy of the TiCSOHCN composite catalyst. Intermediate species arising from the degradation of tetracycline were discerned utilizing LC-MS, and conjectures regarding plausible degradation pathways were postulated. Evaluations of the ecotoxicological impact of tetracycline and its intermediates indicated a progressive diminution in toxicity throughout the course of the photocatalytic degradation process. Furthermore, through free radical capture and EPR tests, it was confirmed that ·O 2 – and ·OH are the primary active species responsible for the photocatalytic degradation of TC, substantiating the proposed rational photocatalytic degradation mechanism. This research provides an innovative approach to developing high-performance and stable photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2024
·
IF 3.4
Fei Chen,Chengbao Liu,Leizhi Zheng,Feng Chen,Junchao Qian,Yongbin Qiu,Xianron Meng,Zhigang Chen
Nickel hydroxide (Ni(OH) 2 ) is recognized as a promising material for electrodes in supercapacitors owing to its exceptional theoretical specific capacitance. However, Ni(OH) 2 has several drawbacks, including a short cycle life, susceptibility to volume expansion, and poor electrical conductivity. In this work, Ni(OH) 2 nanosheets anchored on layered g-C 3 N 4 /C (Ni(OH) 2 –g–C 3 N 4 /C) are designed by biological template induction and a hydrothermal method. Ni(OH) 2 –g–C 3 N 4 /C has unique petal-like structures, which can provide a vertical charge transport channel to increase reaction potential of the material during the charge–discharge process. The introduction of biomass carbon can solve the problem of the bulk phase accumulation of g-C 3 N 4 and can also improve the overall conductivity of the composite. Compared to Ni(OH) 2 (522 F g −1 ), g-C 3 N 4 /C (76.2 F g −1 ), and g-C 3 N 4 (16 F g −1 ), the Ni(OH) 2 –g–C 3 N 4 /C-0.75 (NGC-0.75) composite exhibits the highest specific capacitance of 1034 F g −1 at 1 A g −1 . Furthermore, after 5000 cycles at 5 A g −1 , the capacitance of the material is maintained at 85.97%. Meanwhile, the asymmetric supercapacitor based on the NGC-0.75 shows a high energy density of 18.29 Wh kg −1 at the power density of 400.02 W kg −1 with excellent cyclic stability of 127.45% over 10 000 cycles.
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 11
·2488
·
IF 3.1
Dongmei Zhao,Xinyao Wang,Libin Wang,Jingzhen Wang,Xu Wang,Weipeng Cheng
Antibiotic residues have been found to have potentially harmful effects on ecological and human health. Carbon nitride-based photocatalysts have widely focused on antibiotic photocatalytic degradation. Herein, we prepared Fe-modified g-C3N4nanorod bunches (FCNBs) using chemical vapor co-deposition. Specifically, through the process of calcination, a blend of urea and chlorophyllin sodium iron salt underwent an intriguing transformation, resulting in the integration of Fe into the framework of the g-C3N4nanorod cluster. The resulting photocatalyst exhibited remarkable stability and superior dispersibility. The prepared FCNBs had a unique structure, which was beneficial for increasing light absorption. Furthermore, the Fe species formed a chemical coordination with the g-C3N4matrix, thereby altering the electronic structure of the matrix. This modification facilitated charge transfer, prolonged the carrier lifetime, and enhanced light absorption, all of which significantly increased the photocatalytic activity. The oxytetracycline degradation efficiency of FCNBs was 82.5%, and they demonstrated outstanding stability in cycle trials. This work introduces a promising photocatalyst for the degradation of antibiotics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xu Wu,Zhenru Zhang,Jianquan Zhao,Baogang Wang
Owing to their exceptional thermal stability, distinctive internal layered structure, and superior mechanical strength, graphitic carbon nitride (g-C3N4) materials hold great potential as additives for base oils in the field of lubrication. However, their incompatibility with various base oils has significantly impeded their practical application. In this study, homogeneous and optically transparent g-C3N4 nanosheet/deep eutectic solvent (DES) nanofluids were successfully constructed through hydrogen bond interactions. When incorporated as additives into polyethylene glycol, these nanofluids demonstrated exceptional dispersion stability along with outstanding tribological properties, including remarkable friction reduction, excellent anti-wear performance, superior load-carrying capacity, and prolonged service lifespan. The synergistic effects of tribo-chemical reactions between the DES and iron surface interface and the interlayer sliding and self-repairing properties of g-C3N4 nanosheets played pivotal roles in forming a robust boundary lubrication film. This tribo-induced film, comprising g-C3N4 nanosheets and tribo-chemical derivatives (including iron oxides and iron nitride), exhibited remarkable tribological enhancement, effectively reducing friction and wear of the friction pair. These findings are expected to provide valuable insights into the practical application of g-C3N4 materials in the development of advanced lubricant additives.
✓ 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）