Desalination and Water Treatment
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2024
·
IF 1
Runlin Han,Yongli Xie
In this work, TiO 2 /MXene nanocomposites have been explored with hydrothermal synthesis during the dye photocatalytic degradation process. They worked as photocatalyst with high efficiency. The degradation of organic dye methyl orange with MXene under ultraviolet (UV) light and visible light was studied in detail. The methyl orange can be degraded efficiently especially at acid condition. When the nanocomposites/dye ratio was fixed at 5, most of the dye (close to 99.9%) was degraded under UV and visible light irradiation in 3 h. When MXene was recycled to treat methyl orange, the degradation rate was kept at 96% after 2 cycles under UV light. It was found that the composite material showed improved photocatalytic performance under long time ultraviolet treatment. Scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy characterizations of Ti 3 AlC 2 and MXene were carried to investigate the possible reasons for high degradation efficiency. MXene worked as a cocatalyst which enhanced the separation of electron hole pairs and catalytic performance.
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Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 28
·14642-14650
·
IF 7.443
Yongmei Ma,Honglin Liu,Zhenzhen Han,Liangbao Yang,Jinhuai Liu
An effective near-infrared (NIR) active photocatalyst, NaYF4:Yb,Tm@TiO2/Ag (UC@TiO2/Ag) core@comby shell composite, was synthesized by a simple three-step hydrothermal process. Under the full-spectrum light of a Xe lamp in UV-Vis absorbance experiments, about 96% of R6G dyes in solution were degraded by UC@TiO2/Ag in 120 minutes, while only about 64% of the dyes were degraded by pure TiO2 under the same conditions. Under a UV-filtered Xe lamp, about 35% of the dyes were degraded by UC@TiO2/Ag in 120 minutes; interestingly, only about 8% of the dyes were degraded by pure TiO2. Under irradiation by a 785 nm laser in surface enhanced Raman scattering (SERS) experiments, the photodegradation rate constants were 0.02612 s−1 for UC@TiO2/Ag and 0.00046 s−1 for TiO2/Ag, indicating a nearly 58 fold improvement. After deducting the photobleaching effect, the photodegradation rate constants for UC@TiO2/Ag under 633 and 532 nm lasers were 0.00715 s−1 and 0.00565 s−1, respectively, revealing a sharp decrease under irradiation at shorter wavelengths. Electron spin resonance (ESR) analysis revealed that the presence of UC in this photocatalytic system certainly induced the increase of ˙OH free radicals with NIR irradiation, i.e. the UC core converts NIR light into ultraviolet (UV) light and initiates excellent photocatalytic activity of the TiO2/Ag comby shell. Furthermore, the decorating of Ag nanoparticles not only enhances the photocatalytic ability, but also provides a structural basis for monitoring the photocatalytic kinetics by the SERS technique. By virtue of monochrome laser lines, SERS analysis provides direct evidence to prove the capability of UC-initiated non-UV photocatalysis and the improvement of the utilization of non-UV lights on TiO2. The results revealed that this new photocatalytic platform can efficiently utilize different bands of the solar spectrum and also find new applications in SERS fields.
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JOURNAL OF HAZARDOUS MATERIALS
·
2018
·
IF 6.434
Jingjing Du,Yuyan Zhang,Wei Guo,Ningyun Li,Chaoshuai Gao,Minghui Cui,Zhongdian Lin,Mingbao Wei,Hongzhong Zhang
Titanium dioxide (TiO 2 ) nanoparticles have been applied in diverse commercial products, which could lead to toxic effects on aquatic microbes and would inhibit some important ecosystem processes. The study aimed to investigate the chronic impacts of TiO 2 nanoparticles with different concentrations (5, 50, and 500 mg L −1 ) on Populus nigra L. leaf decomposition in the freshwater ecosystem. After 50 d of decomposing, a significant decrease in decomposition rates was observed with higher concentrations of TiO 2 nanoparticles. During the period of litter decomposition , exposure of TiO 2 nanoparticles led to decreases in extracellular enzyme activities, which was caused by the reduction of microbial especially fungal biomass. In addition, the diversity and composition of the fungal community associated with litter decomposition were strongly affected by the concentrations of TiO 2 nanoparticles. The diversity and composition of the fungal community associated with litter decomposition was strongly affected. The abundance of Tricladium chaetocladium decreased with the increasing concentrations of TiO 2 nanoparticles, indicating the little contribution of the species to the litter decomposition. In conclusion, this study provided the evidence for the chronic exposure effects of TiO 2 nanoparticles on the litter decomposition and further the functions of freshwater ecosystems.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Bao Jiang,Yanhui Niu,Xiuxin Jin,Yuntao Huang,Qin Hu,Yaxin Luo,Jialing Hua
Rational Interface Engineering: We successfully synthesized a GO/MoS 2 /TiO 2 ternary nanocomposite with carefully engineered heterojunction interfaces. This structure not only prevents the restacking of MoS 2 and aggregation of TiO 2 but also facilitates efficient charge separation and accelerates electron transfer rates compared to single or binary counterparts. • Significant Synergistic Enhancement: Rather than simply mixing components, our design yields a substantial improvement in electrochemical performance. The sensor exhibits a 2-fold increase in current response and a significantly lower detection limit compared to the individual MoS 2 electrodes. This result strongly validates the effectiveness of our interface engineering strategy in overcoming the intrinsic limitations of single-component materials. • Self-Cleaning and Anti-Fouling Capability: A distinct advantage of our ternary system is its excellent anti-fouling property. The incorporation of TiO 2 endows the sensor with self-cleaning capabilities (attributed to its photocatalytic activity/surface properties), effectively mitigating electrode passivation caused by the adsorption of oxidation products. This ensures superior operational stability and reproducibility, addressing a common bottleneck in APAP detection. • Practical Robustness: We successfully applied the sensor to the determination of acetaminophen in real pharmaceutical tablets and water samples with satisfactory recovery rates, proving its potential for practical applications in complex matrices. Efficient detection of acetaminophen (APAP) is critical for public health and environmental safety, but traditional electrochemical sensors often suffer from severe electrode passivation and ambiguous interfacial sensing mechanisms.To address these challenges, To address these fundamental challenges, this study constructs a novel photo-assisted electrochemical platform based on a GO/MoS 2 /TiO 2 ternary heterojunction, systematically characterized via XRD, TEM, FTIR, and XPS. Explicitly shifting the focus from conventional metric-chasing (e.g., pursuing extreme detection limits) to rational material design, this work thoroughly elucidates the structure–activity relationship and underlying synergistic mechanisms through comprehensive kinetic investigations (e.g., CV, EIS, and DPV). Experimental results demonstrate that the strategically designed cascaded band structure significantly boosts electrocatalytic activity and interfacial charge transfer. Furthermore, by leveraging the distinct structural advantages of the distinct structural advantages of GO/MoS 2 alongside the photo-assisted properties of TiO 2 , the sensor achieves a dual-mode “anti-fouling and self-cleaning” capability that effectively resolves surface fouling caused by oxidation products. Consequently, the sensor exhibits robust performance with a detection limit of 0.07 µM (S/N = 3) and three wide linear response ranges (7.865∼12.155 µM, 12.155∼71.5 µM and 71.5∼715 µM). Ultimately, this systematic study provides not only a robust platform for real-world APAP monitoring but also a theoretical blueprint for designing next-generation, passivation-resistant sensing interfaces. A photo-assisted GO/MoS 2 /TiO 2 ternary heterojunction sensor was constructed for ultrasensitive electrochemical detection of acetaminophen with enhanced charge transfer and excellent anti-fouling performance.(This graphical abstract was generated using AI tools) Download: Download high-res image (252KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Lingqin Meng,Lu Wei,Duan Zhang,Jialong Wang,Yali Wang,Suping Cui
Tl poisons VTi catalysts by forming stable V-O-Tl bonds at V O active sites. • WO 3 provides steric shielding and acts as a sacrificial trap for Tl species. • WO 3 drives the electronic oxidation of highly toxic Tl + to less harmful Tl 3+ . • Optimized VWTi catalysts retain ~80% NO x conversion under cement kiln flue gas. Thallium (Tl), an extremely toxic and highly volatile heavy metal, has become the primary cause of rapid deactivation of V 2 O 5 /TiO 2 (VTi) SCR catalysts used in cement kilns. Industrial post-operation analyses consistently show exceptional Tl enrichment on catalyst surfaces—often 2–3 orders of magnitude higher than other heavy metals—resulting in a sharp decline in NO x removal efficiency and raising significant environmental and operational hazards. Motivated by real industrial observations that appropriate amounts of WO 3 substantially enhance the Tl tolerance of VTi catalysts, this study provides a mechanistic explanation for both the poisoning pathway and the mitigation effect. We demonstrate that Tl deactivation originates from its strong affinity for V O active sites, where it forms stable V-O-Tl bonds that collapse Lewis acidity, suppress oxygen-vacancy regeneration, and disrupt the V 5+ /V 4+ redox cycle essential for SCR activity. Through multi-scale characterization and DFT analysis, we reveal that WO₃ alleviates Tl toxicity through a dual synergistic mechanism: steric shielding that limits Tl access to vanadium centers, and oxidation of mobile Tl + to less reactive Tl 3+ , thereby weakening its ability to bind and deactivate V sites. This cooperative electronic-structural modulation preserves both acidity and redox functionality under realistic high-Tl exposure. The mechanistic insights presented here offer a rational foundation for developing durable, Tl-resistant SCR catalysts tailored for hazardous flue gas environments in cement and waste-incineration industries.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Tianyu Li,Mengna Zhan,Rongkun Jiang,Yiqing Zeng,Shule Zhang,Zhaoxiang Zhong
CuO-based catalysts have garnered significant attention for CO oxidation reaction, while their susceptibility to sulfur poisoning limits their practical application in industrial flue gas treatment. In this study, three CuTi oxide catalysts with distinct CuO-TiO 2 heterointerfaces were prepared by sol-gel, impregnation, and mechanical mixing methods to investigate the influence of interfacial structure on CO oxidation activity and SO 2 tolerance. Catalytic performance and characterization show that a high-density CuO-TiO 2 heterointerface can induce the formation of strong Cu Ti interactions and improve the dispersion of copper species. These effects facilitate CO adsorption and increase oxygen vacancy concentration, thereby enhancing the low-temperature CO oxidation activity. Although the high-density heterointerface enhances SO 2 adsorption capacity, the accompanying strong Cu Ti interaction reduces the stability of copper sulfate (Cu-O-S) species. This promotes the decomposition of copper sulfate and helps preserve active sites, thus improving SO 2 tolerance. This work offers new insights into the rational design of sulfur-tolerant CuO-based catalysts for CO oxidation.
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Catalysts
·
2026
·Vol. 16
·期 7
·620
·
IF 4.5
Li Fang,Yuxian Jiang,Xueyang Jiang,Qin Zhang,Sihui Suo,Chenhui Zhao,Jiayu Song,Jiancong Liu
Oxygen vacancies are a key factor determining the efficiency of the CO2hydrogenation reaction and play a crucial role in CO2adsorption and activation. However, effectively regulating the concentration of oxygen vacancies to enhance the performance of the light-driven reverse water gas shift (RWGS) reaction remains a challenge. To address this, this study successfully developed Pt/TiO2catalysts with varying oxygen vacancy concentrations by controlling the morphology of TiO2. Structural characterization results indicate that, compared to Pt/TiO2-NR, Pt/TiO2-NB exhibits a higher oxygen vacancy (OV) concentration and greater CO2absorption. Catalytic performance evaluation results showed that under an irradiance of 2.5 W/cm2, the CO production rates of the Pt/TiO2-NB catalyst reached 57.03 mol·gPt−1·h−1. Furthermore, the catalyst maintained excellent catalytic stability during 45 h of continuous operation, demonstrating good potential for practical applications.
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Journal of the Korean Ceramic Society
·
2026
·
IF 4.4
Song Xiao-jie,Weng Tong-juan,Li Jing-wen,Dong Wei-wei,Sun Yue,Liu Shuai-peng,Oh Won-Chun
Photocatalytic reduction of CO 2 into chemical fuels under visible light has garnered increasing attention. Herein, we designed silver nanoparticle (Ag NPs)/carbon quantum dot (CQDs)/TiO 2 nanotubes (TNTs) nanocomposites via a hydrothermal process combined with an in-situ photod-eposition method. Results of methylene blue photodegradation tests under visible light demonstrated that Ag/CQDs/TNTs exhibited higher photocatalytic efficiency than pristine TNTs. In addition, in the carbon dioxide photoreduction experiment, the optimized Ag/CQDs/TNTs has a photocatalytic yield of 38.33 µmol g -1 h -1 when carbon dioxide is converted into carbon monoxide, which is 5.3 times that of pure TNTs. Detailed experimental characterizations revealed that the enhanced photocatalytic performance of Ag/CQDs/TNTs stemmed from the surface plasmon resonance effect of Ag NPs and the excellent optoelectronic properties of CQDs. This work offers insights for fabricating ternary catalysts for photocatalytic CO 2 reduction.
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ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 31
·43048-43064
·
IF 7.8
Guo Yuanyi,Jin Yujie,Chen Weixiang,Huang Jianguo
Ni 3 S 4 -based materials are promising candidates for anodes of lithium-ion batteries (LIBs) due to their high theoretical capacities and excellent redox reversibilities. However, the drawbacks, including low intrinsic conductivity, significant volumetric expansion, and polysulfide shuttle effects, hinder their electrochemical performance and limit practical applications. To address these challenges, herein, a ternary fibrous TiO 2 -Ni 3 S 4 -carbon composite using natural cellulose substance as both the carbon source and structural scaffold was synthesized via hydrothermal and sol–gel approaches. The composite exhibits a nanoarchitecture structure, which retains the three-dimensional network structure of the initial cellulose substance; it is composed of uniformly distributed Ni 3 S 4 nanoparticles wrapping around the carbon fibers with the TiO 2 nanoplates coating on the outermost surface. Due to the spatially organized TiO 2 /Ni 3 S 4 /carbon ternary configuration, the composite exhibits excellent electrochemical performance when employed as an anodic material for LIBs. Specifically, the TiO 2 coating layer acts as a protective layer, suppressing the shuttle effect of polysulfides and stabilizing the solid electrolyte interface (SEI). The synergistic effect of the carbon fiber and the TiO 2 coating layer buffers the volume expansion, prevents the pulverization of the active material, and enhances its structural integrity and stability. Additionally, the Ni 3 S 4 -TiO 2 heterojunction accelerates charge transfer and increases the pseudocapacitive contributions, thereby improving lithium storage performance. Specifically, the TiO 2 -Ni 3 S 4 -carbon anode delivers a reversible discharge capacity of 600.2 mAh g –1 at 1.0 A g –1 after 3000 cycles (70.3% retention). In the full-cell tests, the anode achieves a reversible capacity of 107.4 mAh g –1 after 3000 cycles at 1.0 A g –1 with an energy density of 224.3 Wh kg –1 , demonstrating the application potential of the composite as the anodic material of LIBs.
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高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2026
·
IF 4
Yunxiao Ban,Yufei Zhao,Yuzhen Wu,Haoran Chen,Yaping Jiang
Photocatalytic treatment of wastewater is often limited by insufficient light penetration caused by pollutants and inefficient catalyst recovery. To address these challenges, a novel dual-channel photocatalytic reactor (DCPR) based on an α-Fe₂O₃/TiO₂ film was developed. In this system, light propagates through an independent transparent channel, while pollutants and oxygen flow through a separated reaction channel, enabling enhanced light utilization and improved interaction between reactants and photocatalytic interfaces. The results demonstrate that the dual-channel configuration significantly enhances photocatalytic performance. The degradation rate of methylene blue was 3.65 times higher than that of a conventional single-channel reactor. Under optimized conditions, the phenol degradation efficiency reached 93.05% after 12 h of visible-light irradiation, accompanied by a total organic carbon (TOC) removal efficiency of 71.3%. The α-Fe₂O₃/TiO₂ catalyst film exhibited excellent reusability, maintaining approximately 90% of its degradation efficiency after ten consecutive cycles. Furthermore, the practical applicability of the DCPR system was evaluated using a synthetic industrial wastewater matrix containing phenol, humic acid, and inorganic salts. The reactor maintained continuous degradation capability under this complex wastewater condition, demonstrating its potential for practical wastewater treatment applications. Mechanistic investigations revealed that superoxide radicals (·O₂⁻) and photogenerated holes (h⁺) were the dominant reactive species involved in the degradation process, while hydroxyl radicals (·OH) played a secondary role. The enhanced photocatalytic performance was attributed to the separation of light and pollutant transport pathways, which effectively reduced light attenuation and promoted mass transfer. This study provides an effective reactor design strategy for improving photocatalytic efficiency and offers a promising approach for the treatment of complex wastewater matrices.
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CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Yiwei Zhao,Zuhang Jin,Cheng Tao,Rui Du,Yongzheng Shi,Chao Zhang
The synthesis of KA oil (a cyclohexanone-cyclohexanol mixture) from guaiacol through mild electrocatalytic approach represents a sustainable strategy for biomass valorization. Herein, we report the electrocatalytic conversion of guaiacol to KA oil over the reduced Pt/TiO 2 catalysts. The TiO 2 -induced hydrogen spillover effect facilitates strategic modulation of H ads (H*) coverage on Pt surfaces, thereby effectively suppressing competitive aromatic ring hydrogenation and excessive hydrogen evolution reactions. Comparative studies of electrocatalysis and thermocatalysis have demonstrated that Pt active sites serve as the dominant catalytic centers. However, H spillover significantly influences reactivity and selectivity, particularly in the electrocatalytic pathways. The electrocatalytic system demonstrates preferential C–O bond cleavage with KA oil selectivity around 70%. This work provides valuable insights into the regulation of metal-support interactions in the design of electrocatalysts.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Dexin Jin,Changhua Wang,Yinhe Rong,He Ma,Yingying Li,Xintong Zhang
Photo-plasma catalysis, combining the controllability of photocatalysis with the high reactivity of plasma, presents a promising platform for reactive oxygen species (ROSs) generation. However, efficient coupling of photocatalysis and plasma requires interfaces that integrate multiple catalytic functions to reconcile differences between the two processes. Herein, we report the tuning of the TiO 2 /Co 3 O 4 nano-interface for efficient photo-plasma catalytic ROS generation by loading a Co 3 O 4 nanozyme onto a surface-disordered TiO 2 photocatalyst. For bisphenol A (BPA) removal, the composite catalyst achieves a degradation rate that is 17.3-fold and 12.6-fold higher than those of plasma and photocatalysis alone, respectively. Combined ROS scavenging and probe analyses reveal that the enhanced bisphenol A removal is directly related to the efficient singlet oxygen ( 1 O 2 ). Further mechanistic analyses suggest that the yield of 1 O 2 is linked to the conversion of superoxide radicals (•O 2 − ). The heterogeneous nano-interface serves as the key reaction center. Specifically, surface disorder and heterojunction-driven electron accumulation promote •O 2 − generation via photocatalytic O 2 reduction on TiO 2 , while holes in Co 3 O 4 oxidize plasma-generated H 2 O 2 to •O 2 − through a sustained Co 3+ /Co 2+ redox cycle. Compared with TiO 2 /Fe 2 O 3 and TiO 2 /CuO, TiO 2 /Co 3 O 4 exhibits superior photo-plasma catalytic performance due to the more efficient conversion between H 2 O 2 and •O 2 − enabled by the stable Co 3+ /Co 2+ redox cycle. This work provides a general paradigm for developing interfacial reaction centers in catalysts to improve coupled catalytic ROS generation.
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