APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Xi Wu,Xiangyu Wang,Yu Xie,Nanqi Ren,Jun Ma,Ping Ning
This research provides a innovatively designed mechanism of activating the passivation layer on Fe 0 surface as semiconductor to construct a Z-scheme heterojunction in-situ for high-efficiency environmental remediation. Aggregation and passivation of Fe 0 and poor visible-light absorption of TiO 2 were simultaneously improved by the facile synthesis of a recyclable Fe 0 @black-TiO 2 Z-scheme heterojunction without high-temperature hydrogen atmosphere. The results showed that tetracycline (TC) degradation efficiency with Fe 0 @black-TiO 2 was 1.23 and 2.63 times higher than that of pristine Fe 0 and black-TiO 2 , respectively. The superior degradation arose from strong reduction ability of highly dispersed Fe 0 and in-situ constructed Z-scheme heterojunctions. High dispersion of Fe 0 , construction of the heterojunction, enhanced photodegradability of Fe 0 @black-TiO 2 were systematically elucidated by multiple characterization techniques. Furthermore, photodegradation pathways of TC based on the role of •O 2 - and •OH were identified. Our results have provided the necessary inspiration and guidance for the development and application prospect of Fe 0 @black-TiO 2 in environmental remediation.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Hewei Si,Nengqian Pan,Xidong Zhang,Jianjun Liao,M.N. Rumyantseva,A.M. Gaskov,Shiwei Lin
Chemical oxygen demand (COD) is one of the most widely used parameters for water quality assessment. Quantification and detection of COD slight fluctuations is crucial for an early detection of abnormal change in the water environment. Here we report a real-time on-line photoelectrochemical method for sensitive COD detection using an extended-gate field-effect transistor (EGFET) sensor. The FET gate consists of a Ti mesh electrode with 3D TiO 2 nanotube arrays modified by Pt nanoparticles. The device shows a COD detection limit down to 0.12 mg/L and a wide dynamic linear range from 1.44 mg/L to 672 mg/L at a continuous flow rate of 1.0 mL/s. The method reported also displays excellent stability, accuracy and reproducibility. More importantly, real water samples analyses with the proposed method are in a good agreement with the standard dichromate method. The results suggest that the EGFET-based photoelectrochemical sensors are potential candidates for practical COD onsite measurement.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yue Li,Peihua Li,Rufeng Tian,Xingzi Bian,Jian Wang,Rui Li,Wanggang Zhang,Jiancheng Wang,Yiming Liu
Photoelectrochemical (PEC) seawater splitting offers a sustainable route for hydrogen production; however, it is challenged by the corrosion and sluggish kinetics of photoanodes in chloride-rich electrolytes. To overcome this, we developed a bimetallic metal-organic framework (MOFs) structure with oxygen vacancies (O V ) on TiO 2 nanorods, denoted as (DA)Ni/Mo–MOFs@TiO 2 . This photoanode achieved a high photocurrent density of 2.21 mA·cm −2 and H 2 production rate of 36.07 μmol·cm −2 ·h −1 in real seawater. Notably, it undergoes in situ reconstruction during the oxygen evolution reaction (OER), forming catalytically active Ov–NiOOH accompanied by a protective MoO 4 2− layer. In situ Raman and X-ray photoelectron spectroscopy (XPS) directly revealed the reconstruction process and interfacial adsorption. Density functional theory (DFT) calculations further demonstrated that the reconstructed surface selectively stabilized *OH intermediates (E ad = −4.26 eV), thereby enhancing the OER selectivity and corrosion resistance. This system demonstrated exceptional stability, exhibiting minimal faradaic efficiency loss (1.2–2.3%) in high chloride ion environments (0.7–1 mol/L NaCl). This study provides a novel strategy for designing durable photoelectrodes via pre-catalyst reconstruction.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Cuixia Li,Qijun Li,Bo Yuan,Pengcheng Liu,Yuyue Zhang,Hua Wu,Haize Jin
An economically viable solution to balance photocatalytic efficiency with material recyclability is urgently needed. Z-scheme heterojunction Bi x O y I z /TiO 2 photocatalysts were prepared by in-situ growing Bi x O y I z (BiOI/Bi 4 O 5 I 2 ) nanosheets with tunable ferroelectric built-in electric fields on low-cost three-dimensional printing（3DP） self-supporting hierarchical porous TiO 2 skeletons (TiO 2 -3D). The synergistic adsorption-degradation behavior and underlying mechanisms for tetracycline hydrochloride (TC) were systematically investigated. Results demonstrate that the hierarchical porous structure of the skeletons endowed the composite materials exceptional TC adsorption efficiency (96.2% at 420 min), with performance strongly dependent on pH conditions. The dark adsorption amount is parabolic correlated with the photocatalytic degradation efficiency. The ferroelectric electric field within the Bi x O y I z crystal and the Z-scheme heterojunction electric field synergistically promote the directional separation and transfer of photogenerated carriers. Under visible light, Bi 4 O 5 I 2 /TiO 2 achieves 96.9% TC degradation, featuring a rate constant (20.65×10 -3 min -1 ) double that of TiO 2 -3D. After 5 cycles, the composite material still maintains more than 96% of the initial degradation efficiency and the crystal structure remains stable. This work highlights the crucial synergistic effect of optimizing carrier transfer and adsorption-degradation kinetics to enhance the performance of 3D photocatalysts, providing a new strategy for the design of efficient, stable and economical 3D photocatalytic materials.
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高影响因子
RSC Advances
·
2023
·Vol. 13
·期 11
·7267-7279
·
IF 3.9
Xiang Qin,Jingjing Liu,Genhui Teng,Baorui Liu,Yanhui Xie,Lin Ma,Dongying Hu
P25/PBP (TiO2, anthocyanins) prepared by combining PBP (blueberry peels) with P25, and N-doped porous carbon-supported Ni nanoparticles (Ni@NPC-X) prepared using blueberry-derived carbon were used for the application as photoanode and the counter electrode, respectively, in dye-sensitized solar cells (DSSCs) to create a new perspective for blueberry-based photo-powered energy systems. PBP was introduced into the P25 photoanode and carbonized to form a C-like structure after annealing that improved its adsorption capacity for N719 dye, contributing a 17.3% higher power conversion efficiency (PCE) of P25/PBP-Pt (5.82%) than that of P25-Pt (4.96%). The structure of the porous carbon changes from a flat surface to a petal-like structure due to the N doping by melamine, and the specific surface area increases. N-doped three-dimensional porous carbon supported the loading and reduced the agglomeration of Ni nanoparticles, reducing the charge transfer resistance, and providing a fast electron transfer path. The doping of Ni and N on the porous carbon worked synergistically to enhance the electrocatalytic activity of the Ni@NPC-X electrode. The PCE of the DSSCs assembled by Ni@NPC-1.5 and P25/PBP was 4.86%. Also, the Ni@NPC-1.5 electrode exhibited 116.12 F g−1 and a capacitance retention rate of 98.2% (10 000 cycles), further confirming good electrocatalysis and cycle stability.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yarui Wang,Chengzhuo Yu,Sen Wang,Jin Xu,Fanglan Geng,Silong Wang,Jitao Lv,Lixia Zhao,Yawei Wang
Humic acids (HA) released during algal bloom poses a key challenge for efficient photocatalytic degradation of Microcystin-LR (MC-LR) due to their scavenging function on active species. Herein, MIL-101(Fe)/TiO 2 -P25 (M/P) was constructed to diminish the inhibitory effect of HA on the photocatalytic degradation of MC-LR. Results showed that MC-LR could be efficiently removed assigning to the photogenerated holes (h + ) and superoxide radical (O 2 •− ) oxidation under visible light irradiation, where the carboxy groups of D -glutamic acid (Glu) and methyl- D -aspartic acid (MeAsp), and Adda side chain related to MC-LR biotoxicity were selectively destroyed to achieve MC-LR detoxication. More importantly, HA exerted non-inhibitory effect on MC-LR removal by M/P. The counteracting mechanisms were studied. Firstly, the location of TiO 2 in the pore structure of MIL-101(Fe) could occupy the adsorption sites of HA, and decrease the HA adsorption on M/P. Furthermore, XPS analyses suggested the coordination of unsaturated Fe metal sites on the surface of M/P hybrids complexed with –OH and –COOH of HA, which could accelerate the electron transfer and reduce hole consumption. Thus, the inhibitory effect of HA was alleviated during photocatalytic MC-LR treatment. This work offers a possible way to remove MC-LR in an abundant HA matrix water system efficiently.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Tunmise Ayode Otitoju,Yun Bai,Yaxiong Tian,Zhongmin Feng,Yun Wang,Xia Zhang,Ting Sun
Herein, we present a novel polyvinylidene fluoride/vanadium-titanium dioxide (PVDF-TiO 2 /V) membranes prepared using LBL self-assembly. The membranes were tested for ultrafiltration of bovine serum albumin solution and photodegradation of SMX solution. The neat PVDF membrane was endowed with photocatalytic function due to the synergistic interaction of TiO 2 and V. The structure and morphology of PVDF-TiO 2 /V membranes were characterized using a variety of techniques, showing that TiO 2 /V particles had been successfully integrated on the membrane surface. By increasing the number of TiO 2 /V layers, contact angle tests demonstrated that the membranes hydrophilicity has been significantly improved. The FTIR result demonstrated that the TiO 2 /V was affixed to the surface of the PVDF membrane by interfacial interactions. The thermal property of the PVDF membrane was also improved with the assembly of TiO 2 /V on the membrane surface. The PVDF-TiO 2 /V membranes maintained a high BSA rejection of 99.4 % and FRR of 97.4 % while showing a water flux up to 390.07 kg m -2 h −1 , which is ∼1.5 times higher than that of neat PVDF membrane. Specifically, the membranes were capable of degrading SMX under visible-light. The photocatalytic activity for SMX increased with the number of TiO 2 /V layers, attaining the highest value with four self-assembled TiO 2 /V layers. The reaction rate of the optimum membrane was 11.57-fold compared to the neat membrane under visible-light. Furthermore, 95.9 % degradation efficiency was achieved, even after six cycles. More importantly, BPA, MO, and MB could be photodegraded using the PVDF-TiO 2 /V membranes. Compared to using bulk or powdered photocatalysts, the PVDF-TiO 2 /V membrane is more practical and promising for wastewater remediation due to its many advantages including better long-term stability, ability to endure pollutant degradation, low cost, and environmentally friendly.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 27
·6771-6783
·
IF 4.3
Ma Wanwan,Chen Huan,Hou Hongwei,Hu Qingyuan,Bai Yu
Phosphatidylcholine (PC) and lysophosphatidylcholine (LPC), two types of phospholipids (PLs), have been reported to be closely correlated with head and neck cancers of laryngeal cancer (LC) and thyroid cancer (TC), which make their analysis crucial. TiO 2 @COF-based solid-phase microextraction (SPME) coupled to UHPLC-MS/MS was developed for the rapid and accurate detection of seven potential PL biomarkers from small amounts of serum in this work. The combination of TiO 2 and COF proves to be effective for the extraction of the target analytes. Under optimal conditions, the developed TiO 2 @COF-based SPME-UHPLC-MS/MS method revealed good linearity ( R 2 ≥ 0.997) with LODs ranging from 0.05 to 0.38 ng/mL for PLs, the extraction recoveries and matrix effects ranging from 83.09–112.03% and 85.38–113.67%, respectively. As a high-throughput pretreatment method, satisfactory probe-to-probe reproducibility rates of 2.7–10.1% were obtained. Finally, the TiO 2 @COF-based SPME-UHPLC-MS/MS method was applied to analyze LPC 14:0, LPC 16:0, LPC 18:0, LPC 18:1, LPC 19:0, PC 16:0/18:1, and PC 18:0 in serum samples from early LC patients ( n = 15), early TC patients ( n = 15), and healthy volunteers ( n = 15). The results indicated that cancer patients could be effectively differentiated from healthy controls using orthogonal partial least squares discriminant analysis (OPLS-DA). In conclusion, the established TiO 2 @COF-based SPME-UHPLC-MS/MS method is reliable for the rapid determination of the seven PLs in serum samples, which is promising for early diagnosis of head and neck cancers. Graphical abstract
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PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Zhenxing Wang,Hongli Zhao,Qianmei Gao,Kaicha Chen,Minbo Lan
Here we presented a new facile strategy to fabricate ultrathin two-dimensional (2D) metal oxide nanosheets , by using polydopamine-coated graphene (rGO@PDA) as a template under simply wet-chemical conditions. Based on the strategy, graphene-like CeO 2 –TiO 2 mesoporous nanosheet ( MNS-CeO 2 -TiO 2 ) was prepared and was loaded with dispersive Ag nanoparticles (AgNPs) to obtain effective electrocatalysts (denoted as Ag/MNS-CeO 2 -TiO 2 ) for electrochemical detection of superoxide anion (O 2 •− ). Characterizations demonstrated that MNS-CeO 2 -TiO 2 exhibited ultrathin thickness, larger specific surface area, and pore volume in comparison with its bulk counterpart. The above properties of MNS-CeO 2 -TiO 2 shorten electron transmission distance, promotes mass transfer, and is conducive to the dispersion of post-modified AgNPs. Therefore, the recommended Ag/MNS-CeO 2 -TiO 2 sensors (denoted as Ag/MNS-CeO 2 -TiO 2 /SPCE ) exhibited satisfactory properties, including the sensitivity of 737.1 μA cm −2 mM −1 , the detection limit of 0.0879 μM (S/N = 3), and good selectivity. Meanwhile, the sensors also successfully realized in the online monitoring of O 2 •− released from HepG2 cells, meaning the prepared sensors had practical application potential towards the analysis of O 2 •− in biological samples.
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Yumeng Song,Qiqi Wei,Taotao Lu,Jiuyan Chen,Weifeng Chen,Wei Qi,Shanhu Liu,Zhichong Qi,Yanmei Zhou
Column experiments were carried out to investigate the transport of TiO 2 nanoparticles ( n TiO 2 ) in water-saturated porous media in the presence of various imidazolium-based ionic liquids (ILs) with different alkyl chain lengths and counteranions. The results indicated that the effects of ILs on n TiO 2 transport were considerably dependent upon IL species. In general, the transport-inhibition effects increased with the increasing length of branched alkyl chain on the ILs (i.e., [C 6 mim]Cl > [C 4 mim]Cl > [C 2 mim]Cl). The trend was dominated by the hydrophobicity effects of ILs. Meanwhile, the inhibitory effects of ILs were strongly related to the counteranions and followed the order of [C 4 mim]Cl > [C 4 mim][TOS] > [C 4 mim][PF 6 ], mainly due to different electrostatic repulsion force between nanoparticles and porous media in the presence of various ILs. Furthermore, the inhibitory role of [C 4 mim][TOS] in n TiO 2 transport under acidic conditions (i.e., pH 6.5) was greater than that under alkaline conditions (i.e., pH 8.0). The dominant mechanism was that the differences in the extent of electrostatic repulsion between sand grains and n TiO 2 with or without ILs at pH 6.5 were larger than that at pH 8.0. Moreover, two-site kinetic retention model and DLVO theory provided good descriptions for the transport behaviors of n TiO 2 with different ILs.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Hengjun Gai,Xiaofeng Liu,Bingxiao Feng,Chaojie Gai,Tingting Huang,Meng Xiao,Hongbing Song
Ammonia nitrogen wastewater is the most abundant and widely distributed wastewater. In this work, a highly dispersed heterogeneous metal catalyst Ru@TiO 2 was successfully fabricated by a one-pot method for the catalytic wet air oxidation (CWAO) of ammonia. These catalysts were characterized by different techniques, indicating that Ru clusters were dispersed uniformly on the TiO 2 surface, and some Ru atoms were embedded in the TiO 2 framework. This structure can afford excellent catalytic performance, such as 0.5%Ru@TiO 2 catalyst offers a 95.5% conversion under the condition of 2 MPa at 190 °C in 6 h without adding alkali. Ammonia concentration can be reduced from 200 ppm to less than 10 ppm to meet emission standards. And the selectivity of ammonia oxidation products can be adjusted and controlled according to the reaction conditions. Besides, the kinetics and mechanism of CWAO of ammonia were studied, which provided a theoretical basis for its industrial application.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 31
·期 9
·2009610
·
IF 16.836
Yong Yan,Chunyue Liu,Hanwen Jian,Xing Cheng,Ting Hu,Dong Wang,Lu Shang,Ge Chen,Peter Schaaf,Xiayan Wang,Erjun Kan,Tierui Zhang
The development of economical, highly active, and robust electrocatalysts for oxygen evolution reaction (OER) is one of the major obstacles for producing affordable water splitting systems and metal-air batteries. Herein, it is reported that the subnanometric CoO x clusters with high oxidation state substitutionally dispersed in the lattice of rutile TiO 2 support (Co-TiO 2 ) can be prepared by a thermally induced phase segregation process. Owing to the strong interaction of CoO x clusters and TiO 2 support, Co-TiO 2 exhibits both excellent intrinsic activity and durability for OER. The turnover frequency of Co-TiO 2 is up to 3.250 s −1 at overpotentials of 350 mV; this value is one of the highest in terms of OER performance among the current Co-based active materials under similar testing conditions; moreover, the OER current density loss is only 6.5% at a constant overpotential of 400 mV for 30 000 s, which is superior to the benchmark Co 3 O 4 and RuO 2 catalysts. Mechanism analysis demonstrates that charge transfer occurs between Co sites and their neighboring Ti atoms, triggering the efficient Co Ti cooperative catalytic centers, in which OH* and O* are preferred to be adsorbed on the bridging sites of Co and Ti with favorable adsorption energy, inducing a lower energy barrier for O 2 generation.
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