CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Rongdi Tang,Daoxin Gong,Yaocheng Deng,Sheng Xiong,Jie Deng,Ling Li,Zhanpeng Zhou,Jiangfu Zheng,Long Su,Lihua Yang
In this study, a novel π-π stacked PDI/g-C 3 N 4 /TiO 2 @Ti 3 C 2 photocatalyst with step-scheme (S-scheme) heterojunction was constructed to boost the atrazine (ATZ) photocatalytic degradation by activating peroxymonosulfate (PMS). The π-π interaction in the PDI/g-C 3 N 4 induced the delocalization of the photoelectrons, therefore promoted their migration. Meanwhile, the intimate contact and the staggered band configurations between the PDI/g-C 3 N 4 and TiO 2 @Ti 3 C 2 results in the S-scheme heterojunction thus declined the recombination of photocarriers. The π-π interaction and S-scheme heterojunction synergistically promoted the ATZ removal rate to 75% within one hour and can be well-adapted in a variety of environments. It was found that 1 O 2 domain the photocatalysis, and the H 2 O 2 generated during the reaction may also be helpful for the process. The transformation of ATZ, intermediates, and three pathways during the process were also investigated via LC-MS. Moreover, the total organic carbon analysis shows that the mineralization of ATZ reached 46.08%.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xiaoling Xue,Chongyi Wang,Xun Zhu,Dingding Ye,Yang Yang,Hong Wang,Rong Chen,Qiang Liao
The use of a gas diffusion photoanode for a photocatalytic fuel cell is promising to simultaneously degrade VOCs and generate electricity. However, conventional gas-diffusion photoanode faces the issues of inefficient solar energy utilization and serious electron-hole recombination. Herein, a visible-light-responsive gas-diffusion g-C 3 N 4 /TiO 2 heterojunction photoanode is developed for simultaneous degradation of toluene and generation of electricity. In addition to the intrinsic feature of reduced mass transfer resistance of VOCs to the photocatalytic surface, such a gas-diffusion photoanode not only extends the photo-response spectrum, but also enhances charge separation. Accordingly, the photocatalytic fuel cell with the newly-developed photoanode demonstrates superior discharging performance and toluene removal efficiency over the gas-diffusion TiO 2 and g-C 3 N 4 photoanodes. The maximum power density achieved by the gas-diffusion g-C 3 N 4 /TiO 2 heterojunction photoanode is 0.0375 mW/cm², while the maximum toluene removal efficiency reaches 43.8 %. This study has promoted the development of photocatalytic fuel cells for the degradation of VOCs and electricity generation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 4
·600
·
IF 4.324
Wan Zhao,Xiuru Yang,Chunxi Liu,Xiaoxiao Qian,Yanru Wen,Qian Yang,Tao Sun,Wenya Chang,Xin Liu,Zhi Chen
The increasing discharge of dyes and antibiotic pollutants in water has brought serious environmental problems. However, it is difficult to remove such pollutants effectively by traditional sewage treatment technologies. Semiconductor photocatalysis is a new environment-friendly technique and is widely used in aqueous pollution control. TiO2is one of the most investigated photocatalysts; however, it still faces the main drawbacks of a poor visible-light response and a low charge-separation efficiency. Moreover, powder photocatalyst is difficult to be recovered, which is another obstacle limiting the practical application. In this article, g-C3N4/TiO2heterojunction is simply immobilized on a glass substrate to form an all-solid-state Z-scheme heterojunction. The obtained thin-film photocatalyst was characterized and applied in the visible-light photodegradation of colored rhodamine B and tetracycline hydrochloride. The photocatalytic performance is related to the deposited layers, and the sample with five layers shows the best photocatalytic efficiency. The thin-film photocatalyst is easy to be recovered with stability. The active component responsible for the photodegradation is identified and a Z-scheme mechanism is proposed.Keywords:thin-film photocatalyst;environmental control;antibiotic residue removal;g-C3N4/TiO2;all-solid-state Z-scheme heterojunction
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Qiuyu Wang,Xingyu Huo,Jun Wang,Huanyu Chen,Ziwen Wang,Zhe Yin,Binglin Tang,Guoping Yu,Bo Lv
With the escalating energy crisis, clean and renewable hydrogen energy has emerged as a focal point of research. This study utilizes titanium concentrate as the primary raw material and employed a more convenient and efficient mechanical activation-oxidation-reduction-acid leaching process to effectively enrich TiO 2 , thereby producing a highly active and stable TiO 2 photocatalyst substrate. To further enhanced its photocatalytic performance, this research developed a heterostructured mineral-derived material g-C 3 N 4 /TiO 2 -6/Pt. Experimental results indicated that the hydrogen evolution rate of the g-C 3 N 4 /TiO 2 -6/Pt composite material reached 6.42 mmol/g/h within 5 h, whereas that of g-C 3 N 4 /P25/Pt was only 5.92 mmol/g/h. This study underscores the significance of extracting TiO 2 from titanium concentrate and its subsequent applications. By effectively utilizing titanium resources, it aims to address the increasing industrial demand for TiO 2 while providing innovative solutions to combat environmental pollution and mitigate the energy crisis. These findings hold substantial theoretical and practical implications for advancing related fields.
研究领域:
能源科学
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材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Chunquan Li,Zhiming Sun,Wanzhong Zhang,Caihong Yu,Shuilin Zheng
A novel 3D heterogeneous g-C 3 N 4 /TiO 2 /kaolinite composite with enhanced visible light activity was fabricated via a mild sol-gel method associated with chemical stripping and self-assembly. Compared with bare photocatalysts, the g-C 3 N 4 /TiO 2 /kaolinite 3D structure exhibits enhanced adsorption-photocatalytic degradation ability for the removal of ciprofloxacin (CIP) under visible-light irradiation, and also facilitate the recyclability of the photocatalyst as demonstrated from the reusability test. The apparent rate constant of the composite is up to around 5.35 times, 6.35 times and 4.49 times that of bare TiO 2 , g-C 3 N 4 and P25, respectively, and a possible degradation pathway was also proposed. On the other hand, the as-received composite also exhibited enriched disinfection ability towards S. aureus . It is indicated that the superoxide radical ( O 2 − ) is the main active species in the degradation process, and the superior photocatalytic performance of composite should be mainly attributed to both the improvement of light harvesting as well as the enhanced separation and transfer efficiency. It is expected that this novel ternary visible-light responding composite would be a promising candidate material for the organic pollutants degradation and bacteria inactivation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
·
IF 22.1
Linghui Peng,Haiyu Wang,Guiying Li,Weiping Zhang,Zhishu Liang,Taicheng An
Most commercial air purifiers rely on dense fibrous filters for bioaerosols control, which filter the particulate matter size-dependently without bactericidal activity. Herein, the non-size-dependent bifunctional nickel foam filters (g-C 3 N 4 /TiO 2 (CT)/Ni-polydopamine(PDA)/Ni bifunctional filter) with two layers of coupling nickel foams deposited by CT and PDA, respectively, were developed. The bifunctional filter shows remarkable non-size dependent bacteria removal efficiency (93.5 %) and inactivation efficiency (∼70 %) within 20 min at high airflow (12.5 L min −1 ). The inactivation efficiency can be further increased to 99.99 % with prolong irradiation time and enhancement of light intensity. The non-size dependent capture effect of the CT/Ni-PDA/Ni provided by adhesive force and charge was verified. In addition, the assumption that reactive oxygen species (ROSs) could be transferred into air during bacteria inactivation was first proved by chemiluminescent. This pioneered study may provide new insights into the development of bifunctional filters for non-size dependent capture and photocatalytic inactivation of bacteria in bioaerosols .
研究领域:
环境微生物学
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空气净化技术
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材料科学
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光催化
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生物气溶胶控制
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纳米材料应用
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环境工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Xiaoyan Ma,Huiting Wang,Yaxian Chen,Longfei Fu,Jie Zhou,Ling Zhang,Zhiqiang Xing,Qian Zhang,Lixin Xia
Utilizing hydrothermal synthesis, TiO 2 and g-C 3 N 4 were grown on cotton fabric. Subsequently, Ag NPs were uniformly deposited on their surfaces to produce a Ag@g-C 3 N 4 /TiO 2 cotton fabric substrate (AGTC) with dual-functionalilites of photocatalytic reusability and SERS signal amplification. The introduction of TiO 2 and g-C 3 N 4 nanocomposites significantly enhances the SERS signal on the AGTC substrate for malachite green (MG) detection. The SERS signal on the AGTC substrate is 2.28 times stronger than that on the bare silver-modified cotton fabric, with a reduced detection limit of 6.74 × 10 −13 M. Additionally, the Local Surface Plasmon Resonance (LSPR) effect induced by Ag NPs facilitates electron transfer among substrate components, markedly enhancing photocatalytic capability for degrading organic pollutants under visible light. Consequently, under visible light, the substrate rapidly degrades pollutants and reverts to a reusable state. Experimental results demonstrate the substrate's capability to continuously detect various concentrations and types of target substances, while maintaining high sensitivity. Leveraging the flexibility of cotton fabric, convenient wipe detection and self-cleaning experiments were conducted on the surfaces of different fish species, validating AGTC's outstanding sensitivity in real sample analysis. Therefore, as a flexible and reusable SERS substrate, AGTC exhibits broad potential applications in both SERS detection and photocatalytic degradation of pollutants.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Hao-Yu Zhou,Bai-Yu Feng,Zhen-bin Pang,Guo-Zhi Han
In this paper, using PVP-modified polystyrene microspheres as template, tetrabutyl titanate (TEOT), tetraethyl orthosilicate (TEOS) and melamine as precursor, we developed a facile one-pot two-step method to preparing a novel kind of mesoporous hollow SiO 2 @TiO 2 @g-C 3 N 4 ternary composite microspheres with plush surface, in which highly active black titanium dioxide (TiO 2 ) was formed by simple calcination without further chemical reduction treatment. The structure and morphology of the composite microspheres were detailed characterized for understanding the formation mechanism. Research results indicated that the hollow SiO 2 microspheres can promote the formation of oxygen vacancies in TiO 2 , and the ternary combination narrowed the bandgap width of the black hollow composite microspheres to 1.43 eV, thus endowing it with excellent broad-spectrum catalytic performance for rapid photo-degradation of persistent organic pollutants (POPs) such as dyes and antibiotics in water under sunlight. The removal rates of dyes reached more than 70 %, as well as that of antibiotics more than 50 % within one hour. Finally, a plausible catalytic degradation mechanism was discussed.
研究领域:
环境科学
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材料科学
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化学工程
·
水处理
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产品关联
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2023
·Vol. 31
·期 6
·2415-2423
·
IF 5.3
Zhong Yunjin,Zhang Bingying,Zhu Zhexin,Wang Gangqiang,Mei Xueting,Fang Yu,Lu Wangyang
Plastic wastes threaten the environment security. Degradable materials were considered as the most promising way to solve the problem of plastic pollution. In this work, the cationic dyeable polyester modified with photocatalyst g-C 3 N 4 /TiO 2 was synthesized by centrifugal electrospinning, which had a photodegradable function under solar illumination. The result indicated that cationic dyeable polyester modified with 5% g-C 3 N 4 /TiO 2 composite had excellent self-degradation ability in water environment under solar illumination. After 400 h illumination, the polyester matrix could be almost completely degraded. In addition, degradation products and degradation pathway were analyzed by ultra-high-performance liquid chromatography-mass spectrometry. The chain scission of polyester macromolecule led to the generation of formic acid, sodium sulfate, and short chain substances, and then they were degraded into CO 2 and H 2 O. The degradation of the macromolecular chain was from large to small, from small to without. The design of the degradable polyester material was conducive to reducing the generation of polyester micro plastic pollutants.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 24
·28321-28334
·
IF 2.478
Jiang Yinying,Wang Yizheng,Zhou Kuan,Ding Senxu,Yu Jiang
In recent years, heterojunction photocatalytic materials have received more and more attention. Ball milling and microwave–assisted heating were used in this work to prepare the g–C 3 N 4 /TiO 2 heterojunction photocatalytic nanocomposites with different g–C 3 N 4 /TiO 2 mass ratios (0.5:1, 1:1, 2.5:1, 5:1, 10:1, 20:1, 30:1, and 40:1, labeled as TCN–1, TCN–2, TCN–3, TCN–4, TCN–5, TCN–6, TCN–7, and TCN–8, respectively). The crystal structure, morphology, and optical properties of the samples were characterized by various analytical techniques. The photocatalytic activity was evaluated by the degradation efficiency of Rhodamine B (RhB) and methylene blue (MB) under visible light and UV irradiation. After 120 min at visible light illumination, TCN–7 had the best degradation efficiency with 99.41% for RhB and 91.75% for MB, whereas after 120 min at UV light illumination, TCN–7 exhibited the best degradation effect, and the efficiency reached at 48.66% for RhB and 71.64% for MB, respectively. The analysis of crystal structure of the as–prepared TCN samples confirmed that TCN–7 has a good crystallinity, which is facilitated for photocatalytic activity. In photocatalytic reactions, superoxide radical (·O 2 − ), hydroxyl radical (·OH), and hole (h + ) are recognized as the main active groups, and ·O 2 – plays the main role for TCN–7 in the photocatalytic reaction system for the degradation of RhB.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 7
·4482-4496
·
IF 2.779
Wang Tao,Ding Huihui,Xiao Huan,Sun Tianyi,Xu Jiahui,Zhang Zhengmei,Bian Haiqin,Li Shuang,Zhang Hengyang
In this article, P-g-C 3 N 4 /TiO 2 (the protonated g-C 3 N 4 is noted as P-g-C 3 N 4 ) heterojunction photocatalytic materials with hollow sphere structure were synthesized mainly by high-temperature calcination and secondary hydrothermal methods. To obtain highly efficient heterojunction catalytic materials with more uniform surface compounding, we protonated and exfoliated ultrasonically the obtained g-C 3 N 4 before compounding further, which changed its morphology while retaining its semiconductor properties and optical band gap unchanged, and finally obtained the ultra-thin nanoflake structures. On this basis, an optimal proportion of the highest catalytic activity between these two substances was explored by degrading RHB. It was found that the highest catalytic activity of the complexes was achieved at 110 min with a weight ratio of 0.1 of P-g-C 3 N 4 to TiO 2 after protonating under the same conditions, and complete degradation was reached at 110 min. Afterward, to further investigate its physicochemical properties, we made various characterizations and proposed a suitable catalytic mechanism of Z-scheme regarding its excellent catalytic properties.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 3
·655
·
IF 3.4
Yuxin Bai,Shasha Xu,Jing Chen,Xun Sun,Shan Zhao,Jingcai Chang,Zuoli He
Ternary heterojunction photocatalysts can improve the transport and separation of photogenerated electrons and holes, which could promote their reduction and oxidation properties for environmental and energy applications. In this research, the ternary photocatalyst Ti3C2@TiO2/g-C3N4was successfully synthesized via direct electrostatic self-assembly during hydrothermal process. Ti3C2MXene was used to optimize the interfacial carrier transport and separation between the interfaces. The obtained ternary heterostructured photocatalyst had a higher photocatalytic degradation performance for removing rhodamine B (RhB) and 4-chlorophenol (4-CP). The synergistic effect of heterojunction between g-C3N4and TiO2and Schottky barrier presented among TiO2and Ti3C2suppressed the recombination of the photogenerated electron–hole pairs. Moreover, the Ti3C2can serve as an active site for the adsorption and activation of organic pollutants resulting from sufficient functional groups (F−here).Keywords:Ti3C2;g-C3N4;heterojunction;photocatalyst;4-chlorophenol
研究领域:
环境科学
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材料科学
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化学工程
✓ 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）