JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
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IF 6.76
Junfeng Yang,Yuyang Wu,Yanhui Dong,Hao Cui,Chenyang Shi,Hang Sun,Shengyan Yin
Herein, a ternary Bi@H-TiO 2 /B-C 3 N 4 type II heterostructure is successfully designed and prepared via metal Bi as cocatalyst for photocatalytic H 2 generation. As expected, under λ > 300 nm light, the highest photocatalytic hydrogen production rate (HPR) of Bi@H-TiO 2 /B-C 3 N 4 is up to 223.08 μmol g −1 h −1 . Excitingly, under visible light (λ > 400 nm), the highest HPR of Bi@H-TiO 2 /B-C 3 N 4 is increased to 18.84 μmol g −1 h −1 , which is about 67.3 times, 37.7 times and 6.8 times as high as that of H-TiO 2 , B-C 3 N 4 and H-TiO 2 /B-C 3 N 4 under the same conditions, respectively. Moreover, the electrochemical impedance spectroscopy and transient photocurrent tests manifest that the interface resistance of Bi@H-TiO 2 /B-C 3 N 4 composite decreases and the photocurrent density increases after loading metal Bi. These results indicate that loading metal Bi as cocatalyst (providing more electron trapping sites) is beneficial to improve photocatalytic activity in the type II heterostructure composite. And the electron transfer directions (B-C 3 N 4 → H-TiO 2 → Bi or B-C 3 N 4 → Bi) are proved by ultraviolet photoelectron spectroscopy test. Therefore, the Bi@H-TiO 2 /B-C 3 N 4 photocatalyst with strong visible light absorption is expected to be a promising candidate in photocatalytic fields under visible light.
研究领域:
材料科学
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能源化学
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光催化
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产品关联
DOI
高影响因子
Frontiers of Chemical Science and Engineering
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2024
·Vol. 18
·期 11
·1-11
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IF 4.3
Gao Huimin,Zhang Jinpeng,Zhang Fangyuan,Jing Jieying,Li Wen-Ying
The photocatalytic reduction of CO 2 into formic acid is a feasible approach to alleviate the effects of global climate change and achieve chemical energy storage. It is important to design highly active photocatalysts to improve the selectivity and yield of formic acid. In this study, TiO 2 -based catalysts were prepared and loaded with Pd nanoparticles via an impregnation process. The Pd/H-TiO 2 catalyst demonstrated superior CO 2 reduction activity and a high formic acid production rate of 14.14 mmol cat ·g −1 ·h −1 . The excellent catalytic performance observed in the presence of a Pd/H-TiO 2 catalyst is ascribed to the synergy between O v and Pd. The presence of O v led to increase in CO 2 adsorption while Pd loading enhanced the photogenerated electron-hole pair separation. Electron transfer from H-TiO 2 to Pd also contributed to CO 2 activation.
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 MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 22
·17587-17598
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IF 2.779
Yu Bo,Miao Chun,Wang Dandan,Li Hongji,Sun Dongshu,Jiang Wei,Liu Chunbo,Che Guangbo
The development of high-efficiency heterojunction with improved photocatalytic property is regarded as a promising way to decontaminate wastewater. In this study, Z-Scheme g-C 3 N 4 /H-TiO 2 heterojunctions with different proportions were synthesized. The photocatalytic degradation of rhodamine B (RhB) was studied under visible light irradiation. Among them, 10% g-C 3 N 4 /H-TiO 2 photocatalyst had the best performance, and the degradation rate of RhB was 65% within 120 min. In addition, 10% g-C 3 N 4 /H-TiO 2 photocatalyst had high stability, and its photocatalytic activity did not decrease significantly after four cycles. Through photocurrent analysis, it is found that the photogenerated carriers have obviously excellent separation and transfer characteristics, which makes the 10% g-C 3 N 4 /H-TiO 2 photocatalyst have good degradation performance. Electron paramagnetic resonance (ESR) experiments showed that ·OH and ·O 2 − were active radicals during degradation.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
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2024
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IF 8.9
Qian Xie,Zhengxin Cai,Zhi Zhang,Yongjun Li,Xinyu Zhang,Jianmin Wang,Jiajia Cai
Deliberate engineering of the excellent skeleton to support the MnO 2 can facilitate electron transfer and charge distribution, contributing to high-energy/power supercapacitance. Herein, an ambient and cost-effective hydrogen-doped method is innovatively employed to prepare H-TiO 2 nanotube arrays (H-TNTAs), where the MnO 2 grows further in situ. After hydrogenation, the capacitance increases by 40-fold, attributing to the improved conductivity. The H-TNTAs supported MnO 2 provides good pseudocapacitive performance, with a specific capacitance of 430.1 F/g at a discharging current of 300 μAcm −2 . The H-TNTAs@MnO 2 coupled active carbon (AC) in 0.5 M Na 2 SO 4 electrolyte is fabricated as the aqueous asymmetric supercapacitor (ASC). The ASC device displays a high energy density of 43.9 Wh kg −1 at a power density of 550 W kg −1 , with an output voltage of 2.2 V and a superior capacitance stability of 86.7 % (over 5000 cycles). The idea for designing the hydrogenated transition metal oxides can be extended to other high-performance metal oxide electrodes for energy storage devices.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Xue Cao,Jing Gao,Yufeng Yang,Heyu Li,Xiaobing Zheng,Guanhua Liu,Yanjun Jiang
Laccase enzyme was immobilized on inert support followed by doping this composite with Cu for a more effective chlorophenol inactivation kinetics in the light and in the dark. To be specific, hollow titanium dioxide (H-TiO 2 ) was prepared by using dendritic mesoporous silica nanoflowers (DMSNs) as hard template. Hollow titanium dioxide (H-TiO 2 ) was used to prepare Cu-H-TiO 2 . The support structure stabilized laccase providing Lac@Cu-H-TiO 2 with higher pH, thermal, and irradiation stability. Lac@Cu-H-TiO 2 degraded 2,4-dichlorophenol (2,4-DCP) under visible light to about 95% within 12 h and was fairly stable up to 10 cycles. The stability data of the innovative compound addressed in this study is documented. The photo-active based enzyme integrated photocatalyst are shown in this pioneering study as promising candidates for phenolic pollutant degradation . This is based on the very high activity of enzymes compared to other chemical reagents.
研究领域:
环境科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Ruijie Ma,Huimin Gao,Jinpeng Zhang,Jieying Jing,Wen-Ying Li
Photocatalytic reduction of CO 2 to formic acid (HCOOH) offers a sustainable pathway for carbon utilization, yet its efficiency is fundamentally limited by poor CO 2 adsorption and rapid electron-hole recombination in conventional photocatalysts. To address this challenge, a series of Pd-loaded hydrogenated TiO 2 catalysts (x wt%Pd/H-TiO 2 ) were developed through a synergistic hydrogen reduction-impregnation strategy, aiming to regulate the electron density of Pd active sites and enhance interfacial charge separation. Systematic characterization revealed that increasing Pd loading (0.6–1.4 wt%) effectively trapped photogenerated electrons, suppressing recombination losses and elevating electron density at Pd sites. Combined with optimized CO 2 adsorption capacity (0.178 mmol·g −1 ) and accelerated charge transfer, the 1.0 wt%Pd/H-TiO 2 catalyst achieved a HCOOH production rate of 14.14 mmol·g cat −1 ·h −1 under mild conditions (30 °C, 2.0 MPa, 4.57 mW·cm −2 ), outperforming most reported TiO 2 -based systems. Mechanistic studies further demonstrated a strong correlation between Pd-induced electronic effects and multi-electron CO 2 activation kinetics. This work provides a scalable catalyst design paradigm for balancing charge dynamics and surface reactivity in photocatalytic CO 2 valorization.
研究领域:
环境催化
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材料科学
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能量转换
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纳米技术
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2025
·
IF 2.6
Yong Daming,Kang Xiaomeng,Yin Ming,Wu Qichao
First, a spherical Fe 3 O 4 was synthesized using the hydrothermal method, and subsequently coated with carbon to form a core–shell C/Fe 3 O 4 composite. The Fe 3 O 4 core was then dissolved in an etching solution to create a hollow carbon (H-C) structure. This H-C served as a substrate onto which a Fe 3 O 4 layer was deposited via the hydrothermal method, resulting in a hollow core–shell Fe 3 O 4 /C composite. Finally, the solvothermal method was employed to coat the Fe 3 O 4 /C composite with a layer of hydrogenated titanium dioxide (H-TiO 2 ), resulting in a hollow-structured H-TiO 2 /Fe 3 O 4 /C material. This structure not only ensures the formation of a dual-core shell structure, but also reduces the proportion of carbon material in the composite electrode, thereby enhancing the theoretical specific capacity of the composite electrode. The presence of H-TiO 2 and carbon improved the cyclic stability of Fe 3 O 4 within the composite. This hollow sandwich–structured composite demonstrated excellent electrochemical performance, delivering a discharge specific capacity of 629.5 mAh g −1 after 500 cycles at 0.2 A g −1 , along with a high initial coulombic efficiency of 80.6%.
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2023
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IF 5.8
Weiwei Tang,Jiapeng Kang,Lu Yang,Jialin Lin,Jing Song,Dan Zhou,Feng Ye
Phototherapies, in the form of photodynamic therapy (PDT) and photothermal therapy (PTT), have great application prospects in the field of biomedical science due to high precision and non-invasiveness. Because of the limited therapeutic efficacy of single phototherapy, researchers start to focus on combined PTT-PDT. Here, we designed a composite nanomaterial for PTT-PDT. H-TiO 2 mesoporous spheres were prepared by sol-gel method and hydrogenation treatment. After modification with polydopamine (PDA), they were combined with indocyanine green (ICG) and NPe6 photosensitizers and coated by thermosensitive liposomes to prepare H-TiO 2 @ [email protected] @NPe6 @Lipo nanocomposite component. The results indicated a substantial improvement of the component in the aspects of spectral response range, photothermal conversion efficiency and light absorption performance by modification and photosensitizers, in the absence of any toxicities on cells. Thermal induction and sequential irradiation with 808 nm and 664 nm lasers induced the aggregation of H-TiO 2 @ [email protected] @NPe6 @Lipo at the tumor site to generate hyperthermia and massive reactive oxygen species (ROS), resulting in decreased cell activity or even cell apoptosis and restrained growth of allograft tumors. These findings underscore the favorable effects of H-TiO 2 @ [email protected] @NPe6 @Lipo on the combined phototherapies and provide approaches for the development of nano-drugs in the context of liver cancer.
研究领域:
生物医学科学
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纳米技术
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癌症研究
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治疗学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jiali Luo,Jing Cao,Guangrong Ma,Xue Wang,Yu Sun,Cong Zhang,Zhan Shi,Yiqing Zeng,Tao Zhang,Pintong Huang
Sonodynamic therapy (SDT), a noninvasive therapy that relies on sonosensitizers and generates reactive oxygen species (ROS), has attracted considerable attention in the treatment of pancreatic cancer. However, being surrounded by dense stromal barriers, pancreatic cancer exhibits high interstitial fluid pressure (IFP) and hypoxia in the tumor microenvironment (TME), resulting in poor SDT efficacy. Collagenase-loaded hollow TiO2 (Col-H-TiO2) nanoparticles (NPs) capable of degrading stromal barriers and producing sufficient ROS production were synthesized in this study. After administration of NPs in the patient-derived xenograft (PDX) model, ultrasonic irradiation-released collagenase degraded tumor matrix fibers, decreased intratumoral IFP, and enhanced the penetration and retention of NPs within tumor tissues. Moreover, the NPs accumulated within the tumor not only generate abundant ROS under the influence of ultrasound irradiation but also improve intratumoral ultrasound signal, providing ultrasonic imaging-guided highly effective SDT for pancreatic cancer. In conclusion, this research improves the SDT technique and enhances the visualization of pancreatic cancer by remodeling the TME and is a promising strategy for further clinical applications.
研究领域:
癌症治疗
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纳米技术
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医学成像
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肿瘤微环境
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药学科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）