INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Honggang Lu,Ruiming Jia,Chenjie Wang,Wei Guan,Peng Wang,Lin Zhang,Zhixing Gan,Lifeng Dong,Liyan Yu,Lina Sui
Bare g-C 3 N 4 (CN) encounters substantial charge recombination with strong fluorescence, which is detrimental to the photocatalytic reactions. In this work, g-C 3 N 4 is curved into nanotubes then combined with black phosphorus quantum dots (BPQDs). The BPQDs decorated tubular CN (BPTCN) exhibits a stable and high photocatalytic hydrogen evolution rate of 507.51 μmolh −1 g −1 under visible irradiation, which is four times higher than that of pure TCN. The apparent quantum yield (AQY) at 420 nm of BPTCN reaches 2.58%. The excellent photocatalytic ability of the BPTCN is attributed the suppressed recombination of electron-hole pair and improved carrier transport efficiency, which are introduced by the 1D tubular structure and the band alignment of the BPTCN heterojunction.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Bo Chen,Yuankai Zhang,Jiayi Duan,Feng Wang
Rare earth elements (REEs) pose significant environmental challenges due to the wastewater generated during their extraction. Developing efficient adsorbents with simple, economical and eco-friendly methods for removing and recovering REEs from wastewater is highly demanded but full of challenges. This study creates a novel adsorbent ( g -C 3 N 4 /0.5DPal) for efficient REEs removal and recovery by integrating the low-grade mineral dolomite-palygorskite with g -C 3 N 4 through a "one-pot" calcination method. Characterization techniques including SEM, XRD , FT-IR, XPS , etc., were employed to analyze the structure of the g -C 3 N 4 /0.5DPal composite. Batch adsorption experiments focusing on Gd 3+ from among the REEs were conducted to evaluate the adsorption performance. The results reveal a remarkable 3.34 times increase in Gd 3+ adsorption capacity of g -C 3 N 4 /0.5DPal (192.46 mg/g) compared to raw dolomite-palygorskite (57.62 mg/g) at 298 K, highlighting the effectiveness of the modification. The adsorption mechanism involves electrostatic interactions , surface complexation, and cation-π interactions. It is worth noting that g -C 3 N 4 facilitates the conversion of dolomite to calcite during the preparation process, enhancing the Gd 3+ adsorption of g -C 3 N 4 /0.5DPal. This work offers a promising solution for the removal and recovery of REEs and the high-value utilization of low-grade minerals, addressing both environmental concerns and resource sustainability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PEST MANAGEMENT SCIENCE
·
2024
·
IF 3.8
Qiulan Xia,Maoyang Ran,Lihe Zhou,Zhongwei Liu,Lin Cai
BACKGROUND Ralstonia solanacearum , a notorious and refractory bacterial plant pathogen, threatens multiple vegetable crops and causes significant economic loss in agriculture. Long-term use of traditional medicines not only increases the problem of drug resistance, but also causes great environmental pollution. Therefore, there is an urgent need to develop new agents with high efficacy and low toxicity. RESULTS In this study, we have synthesized and characterized graphitic carbon nitride incorporated copper oxide composite (g-C 3 N 4 @CuO), which showed higher antimicrobial effect than graphitic carbon nitride nanosheets (g-C 3 N 4 nanosheets) and copper oxide nanoparticles (CuONPs). Ralstonia solanacearum exposed to g-C 3 N 4 @CuO exhibited higher levels of oxygen toxicity, cell membrane damage, DNA damage, motility disruption and even cell death compared to g-C 3 N 4 nanosheets and CuONPs. In addition, g-C 3 N 4 @CuO was more effective in the control of tobacco bacterial wilt than g-C 3 N 4 nanosheets and CuONPs. CONCLUSION Thus, this study provides a new perspective on g-C 3 N 4 @CuO control of bacterial diseases in crops, and the mechanism is related to the destruction of cell membrane damage and motility disruption. © 2024 Society of Chemical Industry.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xiangming Li,Shirong Wang,Dongcheng Ye,Weishan Wen,Haitao Li,Zequn Ma,Guanghuan Li,Wen Fu,Meng Fu
Developing highly efficient photocatalysts for the degradation of pharmaceutical and personal care product residues is of significance and challenge. Herein, a graphitic carbon nitride (g-C3N4)/metal–organic framework (MOF) nanosheet/CuO heterostructure was successfully constructed via electrostatic self-assembly and in situ growth strategies. The heterostructure at ultralow doses (6 mg) displayed the highest tetracycline (TC, 20 mg/L) degradation efficiency of 78.8% under visible light within 27 min. Moreover, this heterostructure maintained a good TC degradation efficiency after four cycles. Experimental data and density functional theory calculations demonstrate that the good photocatalytic performance of the as-prepared heterostructure is attributed to the positively charged MOF sheet interlayer and the coupling effect between the g-C3N4, MOF nanosheet and CuO, which can enrich electrons, ions, molecules, and block holes to greatly improve the rapid separation of photogenerated carriers from g-C3N4 or CuO and the adsorption of reactants. The types of reactive oxygen species and effects of inorganic ions on photocatalytic performance were further studied. This work presented a novel strategy to construct a self-assembled heterostructure for visible photocatalytic applications.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 4
·1-19
·
IF 2.4
Cheng Liu,Zhu Zhexin,Wang Gangqiang,Du Shiting
Since Peroxymonosulfate (PMS) is readily available and can produce sulfate radicals with a stronger oxidation capacity, the Fenton-like system Fe 2+ /PMS has gradually replaced Fe 2+ /H 2 O 2 system in organic pollutants degradation. However, the Fe 3+ /PMS system has almost no degradation effects, with the conversion of Fe 2+ to Fe 3+ being the rate-limiting step in the Fe 3+ /PMS system. In this paper, graphite-like phase carbon nitride (g-C 3 N 4 ) was employed to activate PMS using trace amounts of Fe 3+ for the treatment of water pollution under sunlight, and the Fe 3+ /g-C 3 N 4 /PMS system demonstrated the ability to rapidly degrade a wide range of difficult-to-degrade organic pollutants. The Fe 3+ /g-C 3 N 4 /PMS system was able to completely degrade carbamazepine (CBZ) within 30 min under sunlight. The fundings indicated that this system effectively improved the stringent limitations typically associated with Fenton process regarding the feed ratio of metal ions to oxidants, and could efficiently degrade CBZ across a broad pH range. In addition, the Fe 3+ concentration of 6.17 × 10 −6 M was used in the experiments to avoid the generation of large amounts of “iron sludge”. The trap burst experiments, DMSO oxidation experiments and electron paramagnetic resonance spectroscopy experiments indicated that O 2 · − and 1 O 2 exerted the major effectiveness in the photocatalytic degradation reaction of CBZ, and SO 4 · − and · OH jointly promoted the CBZ degradation. Graphical
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Hailong Zhang,Haishui Xu,Ruimeng Li,Ling Quan,Chengyu Zhan,Peng Han,Yangyu Liu,Yuping Tong
Graphitic carbon nitride (g-C 3 N 4 ) is widely utilized in photocatalysis due to its responsiveness to visible light, low cost, and non-toxicity. However, its efficiency is limited by factors such as the rapid recombination of photogenerated electron-hole pairs, slow electron transfer rates, and a limited number of active surface sites. In this study, g-C 3 N 4 was synthesized through thermal polymerization, and varying amounts of graphene oxide (GO) were incorporated via physical blending to fabricate composite photocatalysts. The results indicated that the incorporation of GO not only increased the specific surface area and modified the pore size distribution of g-C 3 N 4 but also affected the heptazine ring structure through chemical bonding, thereby enhancing the density of active sites. Photocatalytic degradation experiments with methylene blue (MB) indicated that g-C 3 N 4 containing 2 % GO exhibited photocatalytic activity 2.84 times greater than that of pristine g-C 3 N 4 . Kinetic simulations indicated that the K app value for the 2 % GO-g-C 3 N 4 composite was 0.00469 min −1 , which is 4.34 times higher than that of pure g-C 3 N 4 (0.00108 min −1 ). Furthermore, this composite maintained high photocatalytic activity after four cycles of reuse. An analysis of the photocatalytic degradation mechanism revealed that the incorporation of GO effectively promoted the separation and transfer of photogenerated electron-hole pairs, enhanced photocurrent density, and improved carrier separation efficiency. Electron spin resonance (ESR) and free radical scavenging experiments confirmed that the primary active species involved in the degradation of MB by the composite photocatalyst were ·O 2 - and h + . This study presents a novel approach for enhancing the photocatalytic performance of g-C 3 N 4 by modifying its electronic structure and surface properties.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yumin An,Zanchao Gao,Beibei Dong,Liguo Dong,Libin Zhao
The photocatalytic hydrolysis reaction primarily unfolds on the material's surface, making the material's morphology and microstructure critical for the catalytic efficiency of photocatalysts. In this paper, a formic acid-assisted melamine hydrothermal self-assembly method is explored to prepare g-C 3 N 4 photocatalysts with a unique morphology. The impact of sintering temperature on the morphology of the g-C 3 N 4 photocatalysts are explored and the effect of formic acid concentration on the XRD and FTIR was analyzed. Findings reveal that the g-C 3 N 4 nanostructures photocatalyst possesses fibrous tubular and nanosheet structures, boasting a heightened specific surface area (32.9 m 2 /g) and a more refined graphite-like crystalline framework. When synthesized with a 0.15 M concentration of formic acid, the g- C 3 N 4 nanostructured photocatalyst achieved a hydrogen production rate (1289.4 μmol h −1 g −1 ), which is approximately 4.8 times greater than that of bulk g-C 3 N 4 (264.7 μmol h −1 g −1 ). This work provides a simple method for preparing high-performance g-C 3 N 4 based photocatalysts for visible light hydrolysis hydrogen production.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wan-Ting Lin,Ping Fu,Wan-Long Li,Yuan-Hui Yu,Zi-Lu Zhang,Hong-Yu Fan,Xiao-Jun Huang,Zhi-Kang Xu,Ling-Shu Wan
Loose nanofiltration (LNF) membranes show applications in various fields such as the separation of dyes and salts. The development of LNF membranes with high permeability and high dye/salt selectivity has received great attention in recent years. In this study, inorganic graphitic carbon nitride (g-C 3 N 4 ) nanofibers modified with polyethyleneimine (PEI) were cross-linked by glutaraldehyde to fabricate a novel LNF membrane on polyethersulfone (PES) microfiltration membrane. Owing to the great hydrophilicity, electro-positivity, and unique structure, the composite membrane exhibits excellent Congo red (CR)/NaCl selectivity of 301.8 with water permeance as high as 162.7 L m −2 h −1 bar −1 . Moreover, the cross-linked inorganic separation layer enables the membranes with excellent alkali and temperature resistance. After being immersed in an acidic solution (pH = 1) or an alkaline solution (pH = 13) for 48 h, the rejection to CR does not significantly decrease. Furthermore, the nanofiltration membrane maintains structural stability without obvious decline in CR rejections over the temperature range of 25 ∼ 95 °C, demonstrating the potential in high temperature separation. The present work will open up an avenue for designing and fabricating high-performance nanofiltration membranes.
✓ 已验证
产品关联
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2024
·
IF 1.4
Ze Cheng,Fuxiao Zhu,Bihui Jin,Zhenhua Hou,Hongbin Li,Gongliang Zhang,Hongman Hou,Jingran Bi,Shuang Yan,Hongshun Hao
Photocatalytic technology has been widely studied, discussed, and tested as a feasible wastewater degradation technology. The present study demonstrated the preparation of g-C 3 N 4 material using solid-state sintering method and the construction of Bi 4 Ti 3 O 12 /g-C 3 N 4 heterostructure via hydrothermal method. This direct contact Z-type heterojunction improves the wide bandgap of Bi 4 Ti 3 O 12 monomer, enhances its photoresponsiveness, and thus improves its photocatalytic performance. During the process of photocatalytic experiments, an environment of cold and hot fluctuations were created, and the pyroelectric effect was utilized to induce self-polarization of the material and formed an internal electric field. It improves the transport ability of electron–hole pairs and suppresses their recombination in the transport path. According to the degradation experiment results, the degradation efficiency of pyroelectric synergistic heterojunction photocatalysis reached 88.7%, which was 2.27 times that of Bi 4 Ti 3 O 12 . It proves that the photocatalysis by pyroelectric synergistic heterojunction has good application prospects.
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Yuqi Cao,Yingpei Liu,Chenchen Ding,Tingting Ma,Huimin Ye,Weiwei Zhong,Wei He
In this study, four cobalt ferrite@carbon nitride (CoFe 2 O 4 @g-C 3 N 4 ) composites were prepared by co-precipitation method to achieve chemo-photodynamic synergistic cancer therapy. The effect of the morphology of g-C 3 N 4 on the chemotherapy and photodynamic therapy of CoFe 2 O 4 @g-C 3 N 4 (CFO@g-C 3 N 4 ) was investigated in detail. CFO@PMCN with porous structures and CFO@CNT with a reticulated structure displayed high loading efficiencies of doxorubicin (DOX), exhibiting a pH-responsive release property and facilitating the delivery of DOX into cancer cells for chemotherapy. CFO@CNT possessed a higher photothermal performance for photothermal agents in cancer treatment compared with other CoFe 2 O 4 @g-C 3 N 4 composites. In addition, more reactive oxygen species (ROS) was generated in the assistance of CFO@CNT under the irradiation condition for photodynamic therapy (PDT) treatment. Based on the synergistic effect of chemotherapy and photodynamic therapy, the obtained CFO@CNT-DOX exhibited an excellent therapeutic effect and significant pH-responsive release characteristics confirmed by dimethylthiazol diphenyltetrazolium bromide (MTT) assay and dual staining fluorescence imaging analysis.
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 1
·95
·
IF 4
Jinghong Fang,Min Wang,Xiaotong Yang,Qiong Sun,Liyan Yu
In this study, a novel Z-scheme heterojunction photocatalyst was developed by integrating g-C3N4nanoplates into ZnIn2S4microspheres. X-ray photoelectron spectroscopy analysis revealed a directional electron transfer from g-C3N4to ZnIn2S4upon heterojunction formation. Under irradiation, electrochemical tests and electron paramagnetic resonance spectroscopy demonstrated significantly enhanced charge generation and separation efficiencies in the ZnIn2S4/g-C3N4composite, accompanied by reduced charge transfer resistance. In photocatalytic CO2reduction, the ZnIn2S4/g-C3N4composite achieved the highest CO yield, 1.92 and 5.83 times higher than those of pristine g-C3N4and ZnIn2S4, respectively, with a notable CO selectivity of 91.3% compared to H2(8.7%). The Z-scheme heterojunction mechanism, confirmed in this work, effectively preserved the strong redox capabilities of the photoinduced charge carriers, leading to superior photocatalytic performance and excellent long-term stability. This study offers valuable insights into the design and development of g-C3N4-based heterojunctions for efficient solar-driven CO2reduction.
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 2
·493
·
IF 4.2
Ligang Ma,Chao Lin,Wenjun Jiang,Shun Yan,Huilin Jiang,Xiang Song,Xiaoqian Ai,Xiaoxiao Cao,Yihuan Ding
Selective supported catalysts have emerged as a promising approach to enhance carrier separation, particularly in the realm of photocatalytic hydrogen production. Herein, a pioneering exploration involves the loading of PdS and Pt catalyst onto g-C3N4nanosheets to construct g-C3N4@PdS@Pt nanocomposites. The photocatalytic activity of nanocomposites was evaluated under visible light and full spectrum irradiation. The results show that g-C3N4@PdS@Pt nanocomposites exhibit excellent properties. Under visible light irradiation, these nanocomposites exhibit a remarkable production rate of 1289 μmol·g−1·h−1, marking a staggering 60-fold increase compared to g-C3N4@Pt (20.9 μmol·g−1·h−1). Furthermore, when subjected to full spectrum irradiation, the hydrogen production efficiency of g-C3N4@PdS@Pt-3 nanocomposites reaches an impressive 11,438 μmol·g−1·h−1, representing an eightfold enhancement compared to g-C3N4@Pt (1452 μmol·g−1·h−1) under identical conditions. Detailed investigations into the microstructure and optical properties of g-C3N4@PdS catalysts were conducted, shedding light on the mechanisms governing photocatalytic hydrogen production. This study offers valuable insights into the potential of these nanocomposites and their pivotal role in advancing photocatalysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）