JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Shuang E,Jiaxing Sun,Kaiying Wang,Ximing Zhang
As ammonia (NH 3 ) is a significant atmospheric pollutant, its removal is crucial for ensuring human and environmental safety. This study aimed to address this issue by combining traditional adsorption technology with photocatalysis to develop a novel method for preparing a TiO 2 /biochar photocatalytic composite. The composite was synthesized through hydrothermal carbonization followed by low-oxygen calcination. The results demonstrated that the composite exhibited notable adsorption and degradation performance for NH 3 . Specifically, when NH 3 at a concentration of 10 ppm was continuously injected at a flow rate of 1 L min −1 , 0.5 g of the composite quickly reduced the NH 3 concentration to 3.73 ppm under ultraviolet light. The composite showed excellent stability, reusability and daylight availability. Hydrothermal carbonization effectively retained oxygen-containing functional groups on the hydrochar and stably bound metals oxides to the carbon carrier. Low-oxygen calcination substantially enhanced the composite's porosity and promoted the formation of TiO 2 active sites. The synergistic effects of high specific surface area, hierarchical porosity and abundant oxygen-containing functional groups on the carbon carrier significantly boosted NH 3 adsorption. Furthermore, the carbon carrier's exceptional electron-storage capability promoted efficient electron-hole separation, thereby elevating photocatalytic efficiency. When TiO 2 was fixed on the carbon carrier, the formation of Ti-O-C bonds reduced the band gap energy, enhancing its response to visible light. The combination of hydrothermal carbonization and low-oxygen calcination simultaneously improved the composite's adsorption and photocatalytic degradation abilities. This study introduces a new approach for NH 3 removal and broadens the application of sunlight in environmental remediation.
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高影响因子
INORGANICA CHIMICA ACTA
·
2025
·
IF 3.2
Jiaojiao Xu,Qiuxuan Ren,Yuqi Liu,Yan Yang,Gai Zhang
The development of stable and efficient photocatalysts for the oxidative degradation of dibenzothiophene(DBT) in fuels remains a major challenge. Herein, a novel spherical binuclear metallophthalocyanine containing methoxy substituents Mn 2 Pc 2 (EP) 4 was self-assembled on TiO 2 via planar conjugated-ligand π-interaction to prepare Mn 2 Pc 2 (EP) 4 /TiO 2 photocatalysts using a facilely “in suit” hydrothermal method. The red-shifted in the UV absorption bands of the Mn 2 Pc 2 (EP) 4 /TiO 2 composites indicated a strong π-interaction between the composite materials. The Mn 2 Pc 2 (EP) 4 /TiO 2 catalysts exhibited high stability and oxidative desulfurization performance towards DBT in a model oil containing n-octane. The catalytic efficiency of the Mn 2 Pc 2 (EP) 4 /TiO 2 composite (98.85 %) was approximately 2.2 times higher than that of TiO 2 (44.97 %). The results verified that Mn 2 Pc 2 (EP) 4 improved the visible-light photocatalytic activity and enhanced the oxidative desulfurization activity of TiO 2. The photocatalytic efficiency of the Mn 2 Pc 2 (EP) 4 /TiO 2 catalyst remained at 92 % for DBT after 5 reaction cycles. Thus, the samples exhibited excellent recoverability and stability compared to that of TiO 2 . Mechanistic studies revealed that the ⁎ O 2 -[Mn 2 Pc 2 (EP) 4 ] + /TiO 2 (e − ) species, which were the main active intermediate via the π-interaction self-assembling of Mn 2 Pc 2 (EP) 4 , effectively improved the photocatalytic oxidation degradation of DBT. This study demonstrates the potential of Mn 2 Pc 2 (EP) 4 /TiO 2 catalysts for developing environmentally friendly and efficient visible-light-driven desulfurization technology.
研究领域:
材料化学
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环境催化
·
能源化学
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纳米材料
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光催化
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yinghui Liu,Xiaoxuan Zhang,Jingrui Rong,De Li,Shujun Lv,Xuejiao Sun
Aqueous zinc ion batteries (AZIBs) are garnering attention as a promising energy storage technology, boasting high energy density, low cost and high safety. Nevertheless, Zn dendrite growth and side reaction seriously affect the AZIBs cycle stability. In this paper, the interlayer separator design strategy is innovatively proposed, and a titanium dioxide fiber membrane (TiO 2 /CNF) with three-dimensional network structure is fabricated using the electrostatic spinning technique, which is used as an interlayer with filter paper to form a new type separator. The TiO 2 /CNF interlayer can suppress the side reaction and promote the uniform Zn deposition. As a result, the Zn||Zn symmetric cell with a current density of 2 mA cm −2 can maintain stable cycling for 650 h. Excitingly, the Zn||CVO full cell equipped with the TiO 2 /CNF interlayer separator achieves remarkably improved, and shows long-term stability of 200 cycles with 1.0 A g −1 current density.
研究领域:
材料科学
·
电化学
·
能源存储技术
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Wei Lei,Yu-gao Wang,Wei-jia Jiang,Jian-xin Liu,Mohannad Mayyas,Jun Shen,Xian-yong Wei
Quantum dots exhibit unique photoconversion properties, making them attractive candidates for enhancing photocatalytic reactions. Nonetheless, it is rarely reported that sulfur quantum dot (SQD) sensitized TiO 2 . Furthermore, the lack of efficient synthetic approaches for high-throughput production of SQD remains a challenge in practical applications. Here, the sublimated sulfur powder was applied to achieve rapid and efficient synthesis of SQD by a two-step oxidation procedure. The method could avoid dialysis and freeze-drying processes while achieving a remarkable mass yield of up to 25% based on sulfur content. Product characterization suggested that the sulfonyl groups of SQD assisted in the attachment of SQD on TiO 2 surface to form SQD-TiO 2 .The performance of SQD-TiO 2 for degrading methyl orange in contaminated wastewater was assessed under simulated sunlight. The photocatalytic performance of SQD-TiO 2 was significantly higher than that of pristine TiO 2 , suggesting excellent simulated sunlight photoconversion synergy between titanium dioxide as a photocatalyst and SQD as photosensitizers. The successful integration of SQD onto TiO 2 would expend the effective utilization approaches of SQD in the field of photosensitizer.
研究领域:
材料科学
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环境科学
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高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·
IF 2.4
Chen Mao,Chen Buxin,Jiang Yang,Zheng Kui,Hu Meilong,Qiu Shuxing
Ti(C,N) is commonly observed in vanadium titanomagnetite blast furnaces and greatly affects the stable and smooth operation of the smelting processes. To get fundamental insight into Ti(C, N) formation, systematic experiments were conducted to investigate the effects of the composition of slags, temperatures, reaction time and reaction atmosphere on the formation of Ti(C,N) from TiO 2 -containing slags. The results show that TiN and TiC contents increase with TiO 2 content increases. When TiO 2 is larger than 30 wt pct, TiN contents increase dramatically. Control of basicity, MgO and Al 2 O 3 concentrations in the slag could help to reduce Ti(C,N) contents in slags. TiN and Ti(C,N) contents increase dramatically with the extension of time. TiN is more easily formed at high temperatures, and TiN contents increase with the increase of temperature. With the increase of N 2 contents, TiC contents are relatively stable, and TiN and Ti(C,N) contents increase almost linearly. H 2 would greatly promote the formation of TiC. This paper can provide a theoretical basis for minimizing the formation of Ti(C,N) in different blast furnace conditions.
研究领域:
冶金学
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材料科学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Kaifeng Wang,Song Shu,Min Chen,Junxi Li,Kai Zhou,Jian Pan,Xialing Wang,Xiangjun Li,Jianping Sheng,Fan Dong,Guangming Jiang
Electrocatalytic hydrodechlorination (EHDC) provides one promising solution to mitigate challenges from the water pollutions by persistent chlorinated organics. Palladium (Pd) has shown appealing properties as EHDC catalysts, while the low earth abundance has urged us to raise its activity and minimize usage. Herein, one novel semiconductor-metal Pd-TiO 2 Schottky heterojunction catalyst was developed, which notably outperformed the conventional Pd-C catalyst in mass activity, dechlorination degree and energy selectivity towards EHDC of 2,4-dichlorophenol (2,4-DCP) in water. A combined experimental and DFT calculation study on mechanism revealed that the primary product phenol had a considerable negative effect on EHDC by competing the active sites with 2,4-DCP. The enhanced performance of Pd-TiO 2 originated from the Schottky heterojunction-induced metal-support interactions, which optimized the Pd electronic structure and balanced the 2,4-DCP adsorption and phenol desorption on Pd. This study highlights one novel strategy to boost the metal performance in electrocatalytic hydrogenation reactions.
研究领域:
环境科学
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材料科学
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催化化学
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DOI
高影响因子
Small Methods
·
2019
·Vol. 3
·期 11
·1900356
·
IF 0
Tongwei Wu,Wenhan Kong,Ya Zhang,Zhe Xing,Jinxiu Zhao,Ting Wang,Xifeng Shi,Yonglan Luo,Xuping Sun
As a sustainable alternative technology to the Haber–Bosch process, electrochemical N 2 reduction offers the hope of directly converting N 2 to NH 3 at ambient conditions. However, its efficiency greatly depends on screening high-active electrocatalysts for the N 2 reduction reaction (NRR). Here, the recent experimental finding that V is an effective dopant to greatly improve the NRR performances of TiO 2 toward ambient N 2 -to-NH 3 fixation with excellent selectivity is reported. In 0.5 m anhydrous lithium perchlorate, V-doped TiO 2 nanorods attain a high Faradic efficiency of 15.3% and a large NH 3 yield of 17.73 µg h −1 mg cat. −1 at −0.40 and −0.50 V versus reversible hydrogen electrode, respectively, rivaling the performances of most reported aqueous-based NRR electrocatalysts. Density function theory (DFT) calculations are performed to gain further insight into the catalytic mechanism.
研究领域:
材料科学
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化学工程
·
理论计算
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DOI
COLLOIDS AND SURFACES B-BIOINTERFACES
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2010
·
IF 2.6
Yang Fan,Hai-Ting Lu,Jin-Hang Liu,Chun-Peng Yang,Qiang-Shan Jing,Yu-Xia Zhang,Xing-Kun Yang,Ke-Jing Huang
A facile hydrothermal method has been developed and shown to be effective for the preparation of TiO 2 –graphene nanocomposite. The as-prepared nanocomposite was characterized using FT-IR spectroscopy, powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The TiO 2 –graphene modified glassy carbon electrode (GCE) exhibited remarkable electron transfer kinetics and electrocatalytic activity toward the oxidation of dopamine (DA). Furthermore, the oxidation of common interfering agent such as ascorbic acid (AA) was significantly suppressed at this modified electrode, which resulted in good selectivity and sensitivity for electrochemical sensing of DA. These results demonstrate that the TiO 2 –graphene hybrid material has promising potential applications in electrochemical sensors and biosensors design.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2016
·
IF 3.902
Fei Ge,Mengfei Yu,Cuixia Yu,Jun Lin,Wenjian Weng,Kui Cheng,Huiming Wang
In the process of biomaterials mediated bone regeneration, rhBMP-2 delivery at efficient dose in sustained kinetics is crucial for promoting cell osteogenic differentiation. Meanwhile, surface morphology of the biomaterials could regulate cellular responses as well as strengthen the rhBMP-2 interaction with cells for better bone induction. Herein, TiO 2 nanorod films with varied mesoporous bioactive glass (MBG) incorporation amount were designed to strengthen the efficacy of rhBMP-2, basing on optimized loading/release behaviors and surface nanostructure cooperatively. The MBG incorporation improved rhBMP-2 loading amount and regulated its release behavior. Consequently, the osteogenic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) on the incorporated films was extremely enhanced, and the incorporated nanorod film with 200 nm MBG thickness exhibited the best osteoinduction effect. However, MBG film and the incorporated nanorod film had the same loading amount of rhBMP-2, the latter showed a much higher expression of 7-day osteogenic differentiation index than the former, which could be attributed to the synergistic effect of optimized rhBMP-2 release behavior and surface morphology. The MBG incorporated TiO 2 nanorod films here presents a promising strategy for enhancing osteoinduction through optimized rhBMP-2 release behavior.
研究领域:
生物材料
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组织工程
·
生物医学工程
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PubMed
高影响因子
FUEL
·
2026
·
IF 7.8
Ligang Ma,Xinlan Li,Tingting Chen,Jingxuan Zhou,Jiulei Zhao,Yichi Zhang,Huilin Jiang,Xiaoqian Ai
Photocatalytic hydrogen production provides a sustainable approach for converting solar energy into clean, high-energy–density hydrogen fuel, addressing both energy shortages and environmental concerns. In this study, three-dimensional ZnIn 2 S 4 nanoarchitectures were grown in situ on TiO 2 nanobelts via a simple oil-bath method, forming core–shell ZnIn 2 S 4 @TiO 2 (ZIS@TO) heterojunctions, with TiO 2 nanobelts as the core and ZnIn 2 S 4 nanoflowers as the shell. The integrated heterojunction combines the structural advantages of both one-dimensional and two-dimensional components. The interface characteristics, band alignment, and charge carrier dynamics of the ZIS@TO were systematically investigated. The results show that the ZIS@TO heterojunction improves the dispersion of ZnIn 2 S 4 and TiO 2 , promoting more efficient interaction between photogenerated electrons and water. Furthermore, the heterojunction facilitates effective charge separation via an S-scheme transfer mechanism, leading to a significantly enhancement in photocatalytic hydrogen evolution activity.
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DOI
高影响因子
Journal of Physical Chemistry C
·
2015
·
IF 4.772
Jingzhong Zhao,Lei Zhang,Weiqiang Xing,Kathy Lu
B/N codoping is an effective way to narrow the band gap of TiO2 to enhance the photocatalytic activity. However, the traditional doping method using ammonia as N source is still unsatisfactory because of its safety risks and high cost. In this work, a benign and cost-effective method has been developed to prepare the B/N codoped TiO2. First, we use TiB2 as the raw material to prepare B-doped TiO2 via a hydrothermal method followed by heat treatment. Then the B/N codoped TiO2 can be simply produced by annealing the mixture of the as-prepared B-doped TiO2 and urea. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results show that the samples present anatase structure and spherical morphology. X-ray photoelectron spectroscopy (XPS) analysis indicates that B and N atoms exist not only on the surface but also in the bulk. Moreover, the content of N atoms decreases with the depth in the sample while Ti3+ content gradually increases with the depth. The UV–vis absorption spectrum shows an extension of light absorption into the full visible region. More importantly, the B/N codoped TiO2 exhibits promoted photocatalytic activity under both UV and visible light than the B-doped TiO2.
研究领域:
材料科学
·
光催化
·
纳米材料
·
无机化学
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DOI
高影响因子
Micromachines
·
2023
·Vol. 14
·期 12
·2186
·
IF 3.4
Yuezhu Wang,Xiaotong Xu,Wenchao Yang,Yawen Wei,Junsheng Wang
All-inorganic lead halide perovskite has emerged as an attractive semiconducting material due to its unique optoelectronic properties. However, its poor environmental stability restricts its broad application. Here, a simple method for the fabrication of CsPb2Br5/TiO2is investigated. The introduction of p-aminobenzoic acid, which has two functional groups, is critical for the capping of amorphous TiO2on CsPb2Br5. After calcination at 300 °C, amorphous TiO2crystallizes into the anatase phase. The CsPb2Br5/TiO2NCs show high long-term stability in water and enhanced stability against ultraviolet radiation and heat treatment, owing to the chemical stability of TiO2. More importantly, photo-electrochemical characterizations indicate that the formation of TiO2shells can increase the charge separation efficiency. Hence, CsPb2Br5/TiO2exhibits improved photoelectric activity owing to the electrical conductivity of the TiO2in water. This study provides a new route for the fabrication of optoelectronic devices and photocatalysts based on perovskite NCs in the aqueous phase. Furthermore, the present results demonstrate that CsPb2Br5/TiO2NCs has considerable potential to be used as a photoelectric material in optical sensing and monitoring.Keywords:TiO2;CsPb2Br5;p-aminobenzoic acid;environmental stability
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