Asia-Pacific Journal of Chemical Engineering
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2024
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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.
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高影响因子
CARBON
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2017
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IF 6.337
Zhiyong Mao,Jingjing Chen,Yanfang Yang,Lijian Bie,Bradley D. Fahlman,Dajian Wang
In this work, a plasma treatment is employed to modify the surface properties of g-C 3 N 4 photocatalyst to enhance its photocatalytic performance. A suite of characterization methods are used to investigate the influence of plasma treatment on the surface properties, such as morphology, hydrophilicity and chemical bonding states. The comparative photocatalytic performance of pristine g-C 3 N 4 and the plasma-treated g-C 3 N 4 (PT-g-C 3 N 4 ) for the degradation of Rhodamine B (RhB) are demonstrated. The degradation efficiency under visible light irradiation for PT-g-C 3 N 4 is >2.0 times as high as that of pristine g-C 3 N 4 . The remarkably enhanced photocatalytic performance for pollution degradation results from the optimization of the surface properties induced by plasma treatment. These findings may provide a promising and facile approach to design high-performance photocatalysts.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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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.
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PubMed
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 4
·1-19
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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
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高影响因子
PEST MANAGEMENT SCIENCE
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2024
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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.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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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.
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高影响因子
ACS Applied Nano Materials
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2024
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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.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Ruilong Ma,Wenchao Gan,Yuanhu Zeng,Shuanglong Feng,Shukai Duan,Peter Feng,Xiaoyan Peng
The demand for gas sensors is experiencing rapid growth, driven by the increasing need for air quality detection in the face of environmental pollution and industrial emissions. However, the widely used metal oxide semiconductor (MOS) gas sensors suffer from drawbacks such as low ability to predict gas concentration and poor selectivity . In this work, a sensor array was fabricated consisting of 10 various gas sensors and combined with an advanced deep learning algorithm to achieve precise predictions of nitrogen dioxide (NO 2 ) at low concentrations. First, graphitic carbon nitride (g-C 3 N 4 ) and In 2 O 3 nanoparticles were composited with different mass ratios, resulting in the formation of distinct g-C 3 N 4 /In 2 O 3 composites as sensing materials. Afterward, SEM, TEM , and XRD were employed to characterize the morphology, structure, and elemental composition of the samples. Furthermore, sensing properties including response, selectivity , and repeatability, are studied for 10 gas sensors based on g-C 3 N 4 /In 2 O 3 composites. Finally, the convolutional neural network-efficient channel attention-gate recursive unit (CNN-AGRU) model was proposed to analyze the patterns of the signals collected from the sensor array when exposed to various NO 2 concentrations from 1 to 9 ppm. The results demonstrated the integration of high-selectivity sensing materials to NO 2 and an advanced deep learning algorithm CNN-AGRU enables to realize a high concentration prediction accuracy of about 97.04% and a low prediction error of 0.20527 ppm for NO 2 gas.
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高影响因子
APPLIED SURFACE SCIENCE
·
2024
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IF 6.3
Dawei Lan,Huiwen Zhu,Jianwen Zhang,Chengrui Xie,Fan Wang,Yueying Zheng,Zeyu Guo,Mengxia Xu,Tao Wu
In this research, a novel composite of typical Zr-based metal–organic frameworks (UiO-66) with porous graphitic carbon nitride (g-C 3 N 4 ) was prepared by an in-situ preparation method. The g-C 3 N 4 /UiO-66 nanohybrids (CNU-0.5chieved almost 100 % efficiency in the degradation of RhB (60 mg/L, 100 mL) within 70 min under visible light, which was 6.46 and 10.56 times faster than that of pure g-C 3 N 4 and UiO-66, respectively. The improved photocatalytic properties were attributed to the large surface area, enhanced optical adsorption ability and the creation of heterojunction between g-C 3 N 4 and UiO-66. The formation of the heterojunction structure enhanced the photoelectron transfer efficiency and reduced the recombination of electron/hole pairs. Furthermore, the trapping experiments showed that •O 2 – , h + and •OH were the active species in the photodegradation process, with •O 2 – playing a dominant role. This study offers valuable insights into the preparation of MOF-based photocatalysts with exceptional effectiveness for the removal of contaminants in wastewater treatment.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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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.
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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.
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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.
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高影响因子
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