CHEMICAL PHYSICS LETTERS
·
2023
·
IF 2.8
Yue Chen,Huan Liu,Liang Hu,Youliang Shen,Lingfang Qiu,Liezhen Zhu,Qianxiang Shi,Xun Xu,Ping Li,Shuwang Duo
Novel Z-scheme ZnIn 2 S 4 /TiO 2-x photocatalyst was successfully fabricated through self-sacrificing template-chemical bath deposition combined with a NaBH 4 reduction method for the first time. It was found that ZnIn 2 S 4 /TiO 2-x exhibited high-efficient visible-light photocatalytic RhB degradation of 91 % within 40 min, which was almost 45.5, 1.2, and 6.1 times better than that of TiO 2 , ZnIn 2 S 4 /TiO 2 , and TiO 2-x , respectively. Moreover, an obscure change in catalytic activity can be observed after five recycles. The excellent photocatalytic performance can be attributed to the synergistic effect of Ov, ZnIn 2 S 4 , and MOF-derived TiO 2 , which extend the visible-light photoresponse range and promote the separation of photo-generated charge carriers.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Zhuojie Zhong,Bowen Luo,Chengyin Lin,Tao Yin,Zhipeng Tian,Chao Wang,Ying Chen,Yanxue Wu,Riyang Shu
An ultrafast preparation method that coupled the photochemical method with the microfluidic technology to synthesize the highly dispersed Ru/TiO 2 catalyst within only 1 min was proposed. This method had an enhanced electron excitation and a high electron transfer efficiency during the preparation process due to the small dimension of the microchannel, which enabled to shorten the preparation time greatly. Much higher metal reduction efficiency was obtained than that of the single photochemical method, and a high Ru metal dispersion on the TiO 2 surface can be achieved. Moreover, a strong interaction between the metal site and the support was formed, resulting in more spillover hydrogen. This Ru/TiO 2 catalyst presented a high activity on the HDO of phenolic compounds. Guaiacol was converted into cyclohexane with 97.6 % selectivity at 260 °C. The raw lignin-oil also can be upgraded efficiently, with the hydrocarbon content increased from 6.7 % to 69.4 %.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Cai Shi,Malin Eqi,Junming Shi,Zhanhua Huang,Houjuan Qi
Three-dimensional (3D) TiO 2 hierarchical microspheres (THMs) were successfully prepared via a facial template-free hydrothermal approach. The possible growth mechanism of THM was also investigated by TiCl 4 concentration-, time-, and temperature-dependent experiments. The results indicate that the formation of an urchin-like hierarchical structure may follow a “nucleation-dissolution and recrystallization-assembly” process. THM was employed for photoreforming under various catalyst and glucose concentrations, solvent compositions , and pH values. The H 2 production rate, glucose conversion, arabinose and formic acid selectivity reached 9.44 mmol g cat. −1 h −1 , 86.35%, 11.32%, and 46.87%, respectively, under the modulated condition with Pt as cocatalyst; this is attributed to the enhanced mass diffusion caused by the 3D hierarchical morphology as well as the interaction between unsaturated Ti atoms (or oxygen vacancies) in THM and the hydroxyl oxygen atoms on glucose. In addition, the enhanced light absorption induced by defects also exerts a positive effect. In this work, we present an emerging sustainable strategy for the coproduction of H 2 and value-added chemicals from biomass-based glucose with economic photocatalysts under mild conditions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 28
·11631-11646
·
IF 4.5
Li Peihang,Ran Hongshun,Pan Yaoyu,Xu Ziqiang,Chen Xueqin,Li Cao,Jiang Bingbing
Membrane separation is one of the most effective ways to remove organic dyes in wastewater. Rationally regulating the pore size of separation membranes would contribute to great performance. However, membranes with a uniform pore structure make it difficult to simultaneously realize high flux and excellent rejection ratio. Herein, functional composite nanoporous fiber membrane material with visible-light-driven self-cleaning performance was constructed by spinning hypercrosslinked polystyrene nanoparticles (HCPNPs) and TiO 2 -based catalysts into the electrospun membrane of polyvinylidene fluoride (PVDF). The composited fiber membrane with a hierarchical pore structure exhibits unique performances: excellent adsorption capacity for organic dyes, reaching 12 mg·g −1 (methylene blue), respectively, extraordinary high photocatalytic degradation rate (up to 99%) and gorgeous cycle degradation performance for MB (degradation rate is maintained at 95% after five cycles), and excellent comprehensive performance for the removal of extensive pollutant library including organic dye, and antibiotic pollutant. Therefore, coupled with facile and economical synthesis, we provide a novel idea for advanced membrane construction, which has the potential to be widely used for organic pollutants’ removal in sewage treatment. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Shaoyu Yuan,Xiaolei Bao,Min Chen,Xiaoxiao Qin,Xueyan Chen,Jianghao Zhang,Changbin Zhang
The rapid intermediate species accumulation on TiO 2 induces the deactivation and is a long-standing unsolved issue in the photocatalytic oxidation of volatile organic compounds (VOCs). Exploring efficient pathway to achieve deep oxidation is of crucial significance. In this study, we observed that TiO 2 with small particle size (S-TiO 2 ) had high toluene conversion but low CO 2 mineralization, while TiO 2 with large particle size (L-TiO 2 ) had low toluene conversion but high CO 2 mineralization. The characterization results showed that S-TiO 2 had a larger specific surface area and more surface hydroxyl groups than L-TiO 2 , which accounted for its higher toluene conversion. Additionally, low toluene adsorption but a larger quantity of reactive oxygen species (ROS) was observed on L-TiO 2 . Our findings further revealed that toluene on S-TiO 2 was initially oxidized to benzene-ring-containing intermediate species by ROS. However, the accumulation of these species suppressed the ROS production and blocked the ring-opening reaction, resulting in low CO 2 selectivity. In contrast, nearly no intermediate species was accumulated on L-TiO 2 due to the low toluene adsorption and abundant ROS production, which allowed the photocatalytic oxidation of toluene on L-TiO 2 to follow the direct ring-opening pathway and achieve higher CO 2 selectivity. This study provides new insight into the mechanism of the photocatalytic oxidation of VOCs.
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Zhong Dai,Yazeng Zhang,Yin Ma,Ying Wu,Chuyu Miao,Yuchun Li
The development of multifunctional composites is a challenging but necessary path for the miniaturization and integration of electronic products. Herein, versatile bimetal hydroxide (NiCo 2 (OH) 6 ) nanowires coated on TiO 2 modified lignin based carbon nanofibers (CNFs/TiO 2 @NiCo 2 (OH) 6 ) have been prepared successfully by the method of electrospinning followed by hydrothermal treatment . The loading of NiCo 2 (OH) 6 , the doping of N, and the modification of TiO 2 endow the CNFs/TiO 2 @NiCo 2 (OH) 6 with multifunctional application in energy storage and microwave absorption (MA). The abundant pores and active sites result in an excellent electrochemical performance with a high specific capacitance of 752.47 F g −1 at 1 A g −1 . More importantly, the assembled supercapacitor exhibits a maximum energy density of 60.64 Wh kg −1 and a superior stability of 90.2 % even after 4000 cycles at the current density of 10 A g −1 . Moreover, considering the unique porous layered-structure as well as eminent electromagnetic matching properties, as-prepared composites display an excellent MA property , which possesses a minimum reflection loss (RL min ) of −46.48 dB and a maximum effective absorption bandwidth (EAB, RL < 10 dB) of 2 GHz (covering 47.62 % of X-band frequency). This work simultaneously delivers the potential application in the field of energy storage and MA.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
C.B. Song,Y.L. Zhao,D.M. Song,L. Zhu,X.Q. Gu,Y.H. Qiang
Dye-sensitized solar cells (DSSCs) based on TiO2 nanotube/nanoparticle (NT/NP) photoanodes and Cu2SnSe3 (CTSe) counter electrodes were fabricated. The effect of the thickness of the CTSe films on the DSSC performance was investigated. It was found that DSSC efficiencies firstly increased and then decreased with increasing the film thickness. The optimized DSSC efficiency of 3.14% was achieved at a suitable film thickness (2.9 μm). This work presents a new approach for developing low-cost alternative for expensive Pt in TiO2-nanotube-based DSSCs.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Meng Jiang,Jing-Shuai Chen
A novel ultrasensitive electrochemiluminescence (ECL) biosensor was developed to detect uric acid (UA) based on Au NRs@TiO 2 nanocomposite. The Au NRs@TiO 2 nanocomposite was successfully prepared. The morphologies of Au NRs@TiO 2 nanocomposite were observed by scanning electron microscope (SEM), transmission electron microscopy (TEM). Morphological representation results showed that the nanomaterials were well dispersed and had a uniform surface. The characterization of electrochemiluminescence properties indicated that the Au NRs@TiO 2 possessed good ECL behavior. The Au NRs@TiO 2 nanocomposite was used to establish a highly sensitive electrochemiluminescence biosensor for the uric acid. A highly sensitive and selective electrochemiluminescence biosensor was established successfully which based on the Au NRs@TiO 2 nanocomposite. Under the optimal conditions, the biosensor shown a wide calibration range from 40 nM to 28 μM (R = 0.9985) with detection limit of 15 nM. The proposed electrochemiluminescence biosensor provided selective detection of uric acid range from 40 nM to 28 μM (R = 0.9985) with detection limit of 15 nM. This biosensor exhibited stable, sensitive and reproducible detection of uric acid, and was able to be used in clinical detection.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Lei Yue,Linjie Zhao,Jingwei Hou,Junyan Wang,Jiamao Li,Chengjian Xiao
Large amounts of tritiated water (HTO) will be produced during the operation of nuclear power plants and fusion devices, which is harmful to the environment and human due to its radioactivity and toxicity. So, the tritium concentration of tritiated water must be reduced to a very low value before discharge. Hydrogen-water isotope exchange reaction (H 2 + HTO→H 2 O + HT) based on palladium membrane reactor has been proposed to process tritiated water. However, a comprehensive study about the influence of operation parameters on the membrane reactor performance is insufficient, which is not conducive to the design of reactor in practical application. Moreover, the commonly used Pt/Al 2 O 3 or Ni/SiO 2 catalysts are not active for tritiated water dissociation, so the catalytic activity of these catalysts is not high. In order to process tritiated water more effectively, a two-stage membrane reactor has been designed and established in this work, and Pt/TiO 2 catalyst with rich oxygen vacancies is used to catalyze the hydrogen-water isotope exchange reaction for the first time. The membrane reactor performance shows an approximate linear relationship with a new combined parameter S 0.5 P 1.5 R / F 2 ( S is membrane area , F is water flow rate , P is vapor partial pressure, R is swamping ratio), which can be used predict the membrane performance . The isotope exchange reaction activity of Pt/TiO 2 is better than that of Pt/Al 2 O 3 due to its good ability for water dissociation and the hydrogen spillover effect. At last, a tritiated water processing experiment by using two-stage membrane reactor with Pt/TiO 2 catalyst with rich oxygen vacancies has been carried out. The tritium decontamination factor reaches 40588, which is the highest experimental value so far. The results indicate that the two-stage Pd membrane reactor based on hydrogen-water isotope exchange reaction is an efficient technology for tritiated water processing.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 34
·15951-15962
·
IF 3.3
Qingmei Tan,Wensheng Zhang,Tianren Liu,Ying He,Yuangong Ma,Yingxin Yang,Dongxue Han,Dongdong Qin,Li Niu
Owing to the advantages of easy separation and recovery, the development of magnetic photocatalysts is essential to create a viable photocatalytic technology for the degradation of antibiotic contaminants in water. Herein, magnetic Fe3O4@TiO2–Co nanocomposites as a highly recyclable and effective photocatalyst with various Co loading percentages were successfully prepared via a facile route and evaluated for the photodegradation of model tetracycline (TC) antibiotics. As a result, the optimal Fe3O4@TiO2–Co-2.7 sample possesses a removal rate of 92.4% for TC degradation, which is 3.2 fold and 1.6 fold higher than those of single Fe3O4 (28.8%) and Fe3O4@TiO2 (58.7%), respectively. The enhanced photocatalytic activity is mainly attributed to the advantages of integrating magnetic Fe3O4 nanospheres and metal Co nanoparticles, resulting in the overall magnetic composites of Fe3O4@TiO2–Co having an ameliorative light collection ability, energy-saving recycling process, excellent photocatalytic activity, and high chemical and environmental stability. Satisfactorily, the Fe3O4@TiO2–Co photocatalyst could be easily recovered from the reaction solution by an applied magnetic field, and its photocatalytic activity shows almost no loss after five cycles of repetitive use. Moreover, the intermediates in the degradation pathway were identified via high-performance liquid chromatography–mass spectrometry (HPLC-MS) and the TC degradation pathway in the photocatalytic reaction of the as-designed system was proposed. The present work was successfully applied for the purification of tetracycline antibiotics in water pollutants, demonstrating a promising prospect for application to other pollutant degradation systems.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lifen Su,Xiaoyu Liu,Wei Xia,Bin Wu,Changjiang Li,Bo Xu,Bin Yang,Ru Xia,Jianhua Zhou,Jiasheng Qian,Lei Miao
Solar-driven water evaporation is a promising technology of freshwater production to address the water scarcity. However, the photothermal material and the distilled water would be contaminated in the evaporation of wastewater including organic pollutants . In this work, MOF-derived C/TiO 2 composites (carbonized UiO-66-NH 2 (Ti)) with simultaneous photothermal and photocatalytic functions are designed for producing freshwater from sewage. With advantageous features of porous structure with large specific area, excellent sunlight absorption and super-hydrophilicity, the carbonized UiO-66-NH 2 (Ti) layer exhibits high water evaporation efficiency of 94% under 1.0 sun irradiation. Meanwhile, the layer can simultaneously decompose the organic pollutants with degradation efficiency of 92.7% in the underlying water during solar-driven water evaporation. This bifunctional material will provide a new approach for solar-driven water evaporation and photocatalytic degradation of organic pollutant synergistically.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AUSTRALIAN JOURNAL OF CHEMISTRY
·
2023
·Vol. 76
·期 9
·615-630
·
IF 1.1
Zhangkun Ren,Lipei Fu,Xinxin Qiu,Wenzheng Chen,Wenzhe Si,Qianli Ma,Minglu Shao,Lifeng Chen,Menglin Wang,Kaili Liao
As a new type of flooding technology, the application of nano-surfactant fluids in the petroleum industry has received much attention in recent years. Stability of the nanofluids, which requires the nanoparticles to remain dispersed in the base fluid during flowing in porous media, is vital for enhanced oil recovery (EOR). In this paper, the feasibility of using amphoteric surfactants to promote the dispersion stability of TiO2 nanoparticles in aqueous solution for EOR was investigated for the first time. The dispersion effects of four major classes of surfactants (cationic, anionic, non-ionic, and amphoteric) on TiO2 nanoparticles were compared. When the ultrasonication time was 10 min, the concentration of TiO2 nanoparticles and surfactant was 0.002 and 0.1 wt%, respectively, and the amphoteric surfactant disodium cocoamphodiacetate (CAD) had better dispersion stability for TiO2 nanoparticles compared with other surfactants. The Zeta potential of the CAD/TiO2 dispersion system was −47.53 mV, and the average particle size was 40 nm. Moreover, a nanofluid flooding system of CDEA-CAD/TiO2, with good dispersion stability and remarkable oil displacement performance, was constructed by compounding CAD with the non-ionic surfactant alkanolamide (CDEA). In the core flooding test, the CDEA-CAD/TiO2 nanofluid effectively enhanced oil recovery by 13.3%, which was mainly attributed to the outstanding wettability reversal, interfacial and emulsifying properties of the nanofluid. This study would help further supplement the research on the dispersibility of TiO2 nanoparticles and construct an efficient nanofluid flooding system to enhance oil recovery.
✓ 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）