COLLOIDS AND SURFACES B-BIOINTERFACES
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2026
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IF 5.9
Yanhong Zhang,Liulu Liu,Nanke Ma,Lixia Xie,Yuan Jin,Guangli Li
PNHC@Pt/TiO₂ core–shell heterojunction for trace Cu²⁺ monitoring. • N/P doping & O defects boost Cu²⁺ coordination and enrichment. • Low LOD 0.006 µM, wide linear range 0.001–20 µM. • Excellent selectivity against multiple coexisting heavy metal ions. • Reliable recoveries (87.1–103.3%) in tap water, soil, serum. Copper ion (Cu 2+ ) is a prevalent heavy metal contaminant in industrial wastewater and natural water bodies. Although it plays a vital role as a trace element in human physiology, overconsumption can result in severe systemic disorders. In this work, a novel electrochemical sensing platform based on P, N co-doped hollow carbon (PNHC) decorated with Pt/TiO 2 nanoparticles (PNHC@Pt/TiO 2 ) was developed for the ultrasensitive detection of Cu 2+ . The composite was systematically characterized by SEM, TEM, XRD, FTIR, Raman spectroscopy, and XPS, confirming the formation of a core-shell structure with a uniform spherical morphology (104.20 ± 0.21 nm), along with N/P heteroatoms that provide specific coordination affinity toward Cu 2+ . Compared to bare and single-component electrodes, the PNHC@Pt/TiO 2 -modified GCE delivered an enlarged electroactive surface area (0.1289 cm 2 ) and lower charge-transfer resistance; under the optimized parameters (pH 5.0, accumulation potential −0.8 V, accumulation time 180 s, and modifier volume 5 µL), this sensor presented a Cu 2+ linear detection range of 0.001–20 µM, a low limit of detection (LOD) of 0.006 µM (S/N = 3), and a high sensitivity of 6.102 µA µM −1 . The sensor also exhibited excellent selectivity against common interfering ions (K + , Na⁺, Ni 2+ , Co 2+ , Zn 2+ , Cd 2+ ), good reproducibility, and long-term stability (83.7% current retention after 8 days). Practical applicability was validated by successful determination of Cu 2+ in tap water, soil, and serum samples with recoveries ranging from 87.1% to 103.3%, demonstrating the reliable performance of the proposed sensor for environmental and biological monitoring.
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JOURNAL OF HAZARDOUS MATERIALS
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2026
·
IF 10.6
Xiaoqiang Wang,Wenjie Liao,Yongyong Cao,Yue Liu,Zhongbiao Wu
In this study, a series of V 2 O 5 -MoO 3 /TiO 2 (VMo/Ti) catalysts were prepared using TiO 2 supports with varying specific surface area for selective catalytic reduction of NO x by ammonia (NH 3 -SCR). The activity tests revealed that the NO conversion of different samples showed a volcano-type variation with surface area rising, where the VMo/Ti-S3 catalyst with moderate surface area possessed the best SCR activity (>80% NO conversion at 250 °C). Meanwhile, the SO 2 oxidation ratio decreased at an elevated surface area. At 350 °C, the SO 2 oxidation ratio of VMo/Ti-S1 catalyst with lowest surface area was about 4.4%, which was around 4 times that of VMo/Ti-S4 sample with highest surface area. Characterization results indicated that, as the surface area increased, both the redox capacity and surface acidity were enhanced. And the vanadium oxides became less polymeric with a gradual increased ratio in dimeric vanadium species and finally more monomer VO x formation, corresponding to the highest SCR activity of VMo/Ti-S3 catalyst. Additionally, the characterization results indicated that the chemisorption of SO 2 was inhibited on high-surface-area catalysts, which was consistent with DFT results. And DFT simulations also confirmed an increased energy barrier for SO 2 oxidation to generate SO 3 process on less polymeric vanadium species. Both the results above indicated the critical role of vanadium polymerization state in SCR activity and SO 2 oxidation. This work offers new insights into the development of efficient SCR catalysts with low SO 2 oxidation rates for industrial applications.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jianfeng Lan,Xianhui Zhang,Jiangfan Chang,Bo Wu,Baiyi Chen,Jianhua Wu
Titanium, known for its high strength-to-weight ratio and excellent corrosion resistance, has great potential for marine engineering application. However, due to its biocompatibility, titanium is highly susceptible to undesirable biofouling in the marine environment. In this study, we developed a long-lasting anti-fouling surface by completely filling Cu 2 O into TiO 2 nanotube arrays with a high aspect ratio of 132 on the titanium. The interfacial bonding strength between the high-aspect-ratio TiO 2 nanotube arrays and the titanium was subsequently enhanced by a factor of 7.98 through a two-step post-anodization and annealing treatment, which was sufficient to resist the stripping effect of the subsequent electrochemical filling of Cu 2 O. Then, the reinforced high-aspect-ratio TiO 2 nanotube arrays were completely filled with Cu 2 O by a two-step electrochemical filling strategy, resulting in a loading amount of Cu 2 O up to 1.5 mg/cm 2 on the titanium and inhibiting its burst release in the seawater with a release rate of less than 10 μ g/(cm 2 ·d). Compared to titanium, this nanocomposite structure maintained over 99 % anti-adhesion ratio against N . incerta for up to 217 days and resisted biofouling for more than 1 month in the actual marine environment. This in-situ prepared, cost-effective, and highly-efficient anti-fouling titanium surface provides a novel strategy for large-scale applications of titanium in the marine engineering.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Ziyang Chen,Long Liang,Huan Yuan,Huan Liu,Peng Wu,Mingli Fu,Junliang Wu,Peirong Chen,Yongcai Qiu,Daiqi Ye,Limin Chen
Strong metal-support interaction (SMSI) is regarded as one of the most important concepts in heterogeneous catalysis; however, few researches are focused on SMSI regulating the support structure, properties and their roles on the catalytic performance. Herein, anatase TiO 2 {001} nanosheets pretreated in different atmosphere were used to load Pt for reverse water gas shift reaction. The Pt/N-doped TiO 2 catalysts exhibited significantly superior catalytic performance. The investigation demonstrated that defects and doped-N enhance the Pt dispersion while Pt and SMSI in turn promote defects regeneration during activation in H 2 . During reaction, surface defects enable CO 2 activation to generate active intermediates which easily decompose into CO. Furthermore, the small Pt particles and SMSI facilitate H 2 dissociative adsorption and spillover to replenish both surface defects and bulk Ti 3+ . Besides, a novel reaction route has been observed that the stable bulk Ti 3+ in N-doped TiO 2 migrate and transform to surface defects, enhancing catalytic performance.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Han Yang,Xiaoyue Liu,Wenbin Huang,Dongdong Chen,Chenghu Liu,Tianyu Bai,Xuan Zhou,Yasong Zhou,Yuqi Yang,Quan Xu,Qiang Wei
The critical challenge in overcoming the efficiency bottleneck of CO 2 methanation is the simultaneous optimization of low-temperature activity and coking resistance in Ni-based catalysts. This study employed Fe to modify Ni/TiO 2 , and the synthesized NiFe/TiO 2 catalyst was thoroughly characterized to elucidate its structural properties, followed by comprehensive assessment of its catalytic performance. Systematic characterization revealed that Fe incorporation enhances metal dispersion and modulates the electronic environment of Ni, promoting the formation of NiFe alloys. Additionally, the oxygen vacancies generated by Fe species improve the local environment of NiO, promote the effective reduction of Ni 2+ , and weaken the interaction between NiFe and the support, enabling NiFe catalysts to achieve reduction at lower temperatures. By optimizing the Ni/Fe ratio, the distribution of basic sites on the catalyst surface was precisely tuned, which was crucial for CO 2 activation, adsorption of oxygenated intermediates and carbonaceous intermediate. The Ni 3 Fe 1 /TiO 2 catalyst (Ni/Fe = 3) characterized by small metal particles, high NiFe alloy, and abundant medium-strength basic sites, exhibits exceptional performance at 280 °C. It achieved 86.6% CO 2 conversion with 98.1% CH 4 selectivity, representing 19.4% and 3.8% improvements respectively over the Ni/TiO 2 catalyst. DFT calculations further confirmed that NiFe alloy strengthens the adsorption of oxygenated intermediates (O*, OH*, H 2 O*), promoting CO 2 activation, while weakening carbonaceous species (C*) adsorption.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Zhiyuan Liu,Guoqiang Huang
Conventional adsorbents used for removal of trace phosphine from recycled off-gas in polysilicon production often suffer from limited breakthrough capacity and rapid deactivation under oxygen-free conditions. In this work, a nitrogen-doped TiO 2 -supported Cu-based adsorbent (Cu x N y @TiO 2 ) was synthesized using a simple one-pot solid-state route to enhance PH 3 removal performance. Nitrogen incorporation effectively regulates the surface chemical and electronic properties of TiO 2 , resulting in improved dispersion and stabilization of CuO species, enhanced surface basicity, and increased abundance of reactive surface oxygen species. Under an inert N 2 atmosphere at 30 °C, the optimized Cu 20 N 10 @TiO 2 exhibited a high PH 3 breakthrough capacity of 204.7 mg·g −1 and a breakthrough time of 2280 min at a weight hourly space velocity of 24,000 h −1 , significantly outperforming the undoped counterpart. Density functional theory calculations revealed that PH 3 could be readily activated on CuO surfaces through a low-energy stepwise dehydrogenation pathway, facilitating subsequent oxidation by lattice and chemisorbed oxygen species. Regeneration experiments demonstrated that the adsorbent retained 86.6% of its initial capacity after three cycles. This study proposes a cost-effective strategy for designing robust Cu-based adsorbents and offers mechanistic insights into adsorption-oxidation processes relevant to industrial gas purification.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Jing-lan Huang,Bi-ying Huang,Xiao-dan Mei,Qi-yue Wang,Hai-zhen Liu,Cun-ke Huang,Xiao-ying Xie,Jin Guo
Addressing the bottlenecks of cold-welding, oxidation, and low refining efficiency of ductile magnesium powder in conventional ball milling, this study develops a novel heptane-assisted dielectric barrier discharge (DBD) wall-attached plasma ball milling (NPBM) process. High-purity 50–200 nm spherical Mg–TiO 2 composites were synthesized within only 1 h. Our findings reveal that the “Melting-Sputtering-Quenching (MSQ)” mechanism induced by NPBM is the primary driver for the rapid 100 nm-level spheroidization of Mg, while heptane serves as both a quenching medium and a chemical barrier to suppress thermal welding and side reactions. Kinetic investigations demonstrate that the composite achieves a hydrogen absorption capacity of 4.50 wt% at 175 °C, with a JMAK dehydrogenation activation energy as low as 92.6 kJ mol −1 . This work provides a promising strategy for the rapid synthesis of metastable light-metal hydrogen storage materials.
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高影响因子
LANGMUIR
·
2026
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IF 3.9
Zhengyu Ding,Xinnan Zhou,Binjie Xin,Yalong Liu,Xuan Xing,Zheyao Xia,Jun Zhang,Kainan Guo
Oily wastewater and antibiotic residues (e.g., tetracycline hydrochloride, TCH) pose significant threats to aquatic ecosystems and human health. Conventional remediation technologies frequently suffer from low efficiency, secondary pollution, or high energy consumption. Rigid ceramic membranes, once deemed the “gold standard” in separation fields, exhibit inherent drawbacks, including brittleness, low porosity, and severe fouling propensity. To address these challenges, flexible hierarchical-porous carbon nanofiber membranes codoped with TiO2/ZnO heterojunctions (TZCNFMs) were successfully fabricated via electrospinning, preoxidation, and carbonization processes. Research findings demonstrated that the optimized TZCNFM (with a specific TTIP/Zn(OAc)2 mass ratio) exhibited superior comprehensive performance, characterized by a rough surface with nanoprotrusions, a large specific surface area, and favorable tensile strength. This optimized membrane showed strong hydrophobicity and superoleophilicity, enabling high separation efficiency for water-in-oil emulsions. Under visible light irradiation, the constructed TiO2/ZnO heterojunctions in TZCNFM2 formed a staggered band structure, which not only effectively suppressed the recombination of photogenerated electron–hole pairs but also narrowed the overall band gap of the composite system to extend the light response range to the visible region, realizing efficient degradation of antibiotic residues. Furthermore, the membrane maintained negligible flux decline after multiple cyclic uses, confirming its excellent reusability. This work highlights the synergistic regulation of TiO2/ZnO on the structure, wettability, and mechanical stability of carbon nanofiber membranes, providing a scalable strategy for fabricating high-performance self-cleaning membranes in aquatic pollution remediation.
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高影响因子
CHEMICAL PAPERS
·
2018
·Vol. 72
·期 11
·2871-2877
·
IF 0.963
Wang Yazhen,Li Rifang,Jia Hongge,Yang Guoxing,Di Yutao,Xu Chenxi,Ma Liqun,Zhang Hui,Zhou Yongli,Zang Yu,Xu Shuangping,Sun Zhaoyang,Zu Liwu,Yue Chenge,Lan Tianyu
A novel peroxy group-containing silane coupling agent was synthesized and anchored on the surface of titanium dioxide nanoparticles (nano-TiO 2 ) to form an immobilized-initiator-modified nano-TiO 2 species. In this study, the kinetic parameters of the peroxy group-containing silane were tested and assessed using DSC. The pre-exponential factor ( A d ) was 8.973 × 10 8 and the activation energy ( E a ) was 80.736 kJ mol −1 . Moreover, the empirical Arrhenius equation was determined to be ln K d = − 80.736/ RT + ln(8.973 × 10 8 ). To obtain continuous polymers, acrylonitrile (AN) and methyl methacrylate (MMA) were polymerized using the novel peroxy group-containing silane and FeSO 4 as an initiator system. The number average molecular weights ( M n of PAN = 3×10 4 and M n of PMMA = 1.4 × 10 5 ) and polydispersity indexes (PDI of PAN = 2.76 and PDI of PMMA = 1.65) were determined by GPC. It was suggested that the redox initiation system can generate highly reactive species on the surfaces of inorganic nanoparticles. The nano-TiO 2 -grafted polymers were successfully obtained.
研究领域:
高分子化学
·
材料科学
·
纳米技术
·
表面改性
·
引发剂设计
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Caimei Lu,Rongrong Song,Junhui Wang,Kun Liu,Tian Fu,Rui Tang,Luying Jiang,Zhangfa Tong,Hanbing Zhang
Effective removal of hazardous and low biodegradable benzophenone-3 (BP-3) has been a challenging problem. In this study, a new Vis/TiO 2 /PDS/Cu 2+ system was constructed to evaluate the catalytic performance of BP-3 during the co-induced ligand-to-metal charge transfer (LMCT) process by Cu 2+ , PDS and TiO 2 . Under visible light irradiation, trace Cu 2+ efficiently triggering LMCT process from PDS to TiO 2 via Cu–O bridging effect was firstly reported. In this LMCT-mediated photocatalysis process, Cu 2+ was not only involved in the formation of visible-light responsive TiO 2 -Cu-PDS complexes but also inhibited the back electron transfer and promoted PDS activation by accelerating the electron transfer from the conductive band (CB) of TiO 2 to PDS via Cu 2+ /Cu + cycle. Compared with BP–3 removal in Cu 2+ /PDS system (18%) and Vis/TiO 2 system (48%), that in Vis/TiO 2 /Cu 2+ system (58%) and Vis/TiO 2 /PDS system (54%) exhibited a slight improvement. It was worth noting that BP-3 removal in Vis/Cu 2+ /TiO 2 /PDS system reached 91% within 30 min and the corresponding TOC removal was up to 76% in 120 min, which proved that the significantly enhancement of BP-3 degradation in Vis/Cu 2+ /TiO 2 /PDS system. Meanwhile, this system could maintain efficient catalytic performance in a wide pH range from 3 to 8. The formation of an interfacial charge transfer complex of Cu-PDS on TiO 2 , and the boosted generation of O 2 – , SO 4 − and HO radicals over the Vis/Cu 2+ /TiO 2 /PDS system were confirmed. Notably, visible light excited Cu-PDS complexes to distribute electrons to TiO 2 (CB) via Cu–O bridge action, thereby inducing the enhanced visible-light activity of TiO 2 and achieving superior catalytic performance for various pollutants in Vis/Cu 2+ /TiO 2 /PDS system. Furthermore, enhanced activation mechanisms of TiO 2 and PDS by visible-light induced LMCT process were proposed in detail. Hydroxylation, demethylation and ring-opening dominated BP-3 degradation, and the weakened toxicity of BP-3 in Vis/TiO 2 /PDS/Cu 2+ system was confirmed via the distinct increase of E.coli colonies numbers at the introduction of intermediates. This study offers new insights into LMCT activation approach and broadens the understanding of the ability of Cu 2+ to be applied in photo-activated persulfate-based advanced oxidation processes for environmental remediation.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yunning Chen,Renquan Guan,Xueying Cheng,Jie Zhao,Zhengkai Wu,Yan Wang,Qingkun Shang,Yingnan Sun
In this paper, two surface oxygen vacancy-rich TiO 2 composite photocatalysts were successfully constructed by solid thermal reduction ((R-Vo)TiO 2 ) and bimetallic doping (Nd-Fe-(D-Vo)TiO 2 ). The oxygen vacancies were characterized in detail using XPS, Raman, EPR and STEM. The results show that the excellent photocatalytic performance of Nd-Fe-(D-Vo)TiO 2 deriving from its doping energy and surface oxygen vacancies. Nd-Fe-(D-Vo)TiO 2 could degrade 58 % of phenol within 120 min, which was much greater than 15 % of TiO 2 and 27 % of (R-Vo)TiO 2 . Three composite photocatalysts, TiO 2 @EA, (R-Vo)TiO 2 @EA and Nd-Fe-(D-Vo) TiO 2 @EA, with better visible light absorption and photocatalytic performance were further obtained by bonding ellagic acid (EA) to the surface of TiO 2 . Nd-Fe-(D-Vo)TiO 2 @EA could almost completely degrade ethinyl estradiol within 20 min with a high minimization degree of 84 %. The possible sites of ethinyl estradiol attacked by free radicals were predicted by theoretical calculation combining with high-resolution mass spectrometry analysis, and the possible degradation mechanism was proposed.
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高影响因子
POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Zheng Li,Zuodong Qin,Chunxuan Li,Guimei Zhang,Aozheng Zhang,Sisi Li,Guoqi Liang,Xin Wang,Wufei Tang
Nano calcium carbonate (CaCO 3 ) was successfully treated by tetrabutyl titanate sol together with nickel hydroxide, followed by calcination to form a new kind of flame retardant (Ni-TiO 2 @CaCO 3 ). After study of the Ni-TiO 2 @CaCO 3 structure, it was then introduced into epoxy resin (EP) to improve the flame retardancy and thermal stability. The results shown that NiO and TiO 2 were supported on the surface of the CaCO 3 , and 5 wt% CaCO 3 could enhance the flame retardancy and Ni-TiO 2 @CaCO 3 further increased the flame retardancy of the EP composites. In the cone calorimeter test (CCT), the values of the peak heat release rate (pHRR) and smoke production rate (pSPR) were reduced to 769 kW/m 2 and 0.32 m 2 /s by CaCO 3 from 1101 kW/m 2 and 0.39 m 2 /s of the raw EP respectively. Moreover, pHRR and pSPR values were further decreased to 511 kW/m 2 and 0.25 m 2 /s by Ni-TiO 2 @CaCO 3 respectively. Although the degradation temperature values were lower than that of the control EP, the temperature values at 5 and 50% mass loss for Ni-TiO 2 @CaCO 3 /EP composites were improved compared to the EP. In addition, the char residues value of the Ni-TiO 2 @CaCO 3 / EP composite (23.5%) was obviously improved compared to that of the EP (13.0%) and CaCO 3 / EP composite (16.4%). In addition, the flame retardancy mechanism of the Ni-TiO 2 @CaCO 3 / EP composite was thoroughly analyzed by TGA-FTIR, FITR and Raman methods. This work provides a promising evaluation strategy for utilizing CaCO 3 and its derivatives for possible treatment of EP to enhance its flame retardancy and thermal stability.
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危险品化学品经营许可证（带存储）