Nanoscale
·
2026
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IF 5.1
Limeili Tian,Miaomiao Yang,Jing Wang,Shuai Yang,Chunxu Han,Yangyang Huang,Qingqiang Meng,Aiping Wu
Photocatalytic degradation is an eco-friendly method for decomposing tetracycline hydrochloride (TC), yet it faces challenges such as slow photogenerated carrier transfer, poor separation efficiency, and limited active sites. Semiconductor composites offer a promising solution to enhance catalytic efficiency. In this context, a novel 0D/2D BiOCl 0.7 I 0.3 /Bi 2 MoO 6 (BOCI-BMO) direct Z-scheme photocatalyst was synthesized via a solvothermal method, featuring 0D BiOCl 0.7 I 0.3 quantum dots anchored on 2D Bi 2 MoO 6 nanosheet. The composite photocatalyst with an optimal BOCI to BMO mass ratio of 7:3 (50 mg), achieved over 94% removal of TC (10 ppm) in 40 minutes, demonstrating excellent cyclic stability and broad applicability. Both theoretical calculations and experimental results confirm that the photogenerated carrier transport between semiconductors follows a Z-scheme mechanism, significantly enhancing carrier separation efficiency while preserving strong redox capabilities. Moreover, the unique 0D and 2D structures provide a large specific surface area, offering abundant active sites and reducing carrier transport distance, thereby boosting photocatalytic performance. This study provides theoretical and experimental insights for designing and synthesizing novel visible light-responsive photocatalysts.
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JOURNAL OF CATALYSIS
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2026
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IF 6
Meng Liu,Jianhao Qiu,Guanglu Xia,Lu Zhang,Chen Chen,Qian Liu,Jianfeng Yao
Efficient and selective cleavage of C–C bonds in lignin remains a critical hurdle for its sustainable valorization into aromatic chemicals. Herein, we rationally construct a Z-scheme heterojunction photocatalyst by integrating phosphorus-doped graphitic carbon nitride (P-CN) with rod-like Bi 2 O 3 derived from a bismuth metal–organic framework (Bi-MOF). Phosphorus doping effectively modulates the band structure of g-C 3 N 4 , broadening visible-light absorption and enhancing its reduction capacity. Notably, Bi-MOF serves a dual function: it acts as the precursor for rod-like Bi 2 O 3 while simultaneously functioning as a pore-generating agent. Its decomposition during thermal treatment imparts substantial mesoporosity to the overlying g-C 3 N 4 nanosheets, dramatically increasing the specific surface area of the heterojunction. This mesoporous architecture and high surface area facilitate lignin diffusion and oxygen capture, thereby promoting the generation of carbon-centered radical intermediates and singlet oxygen—the key reactive species driving lignin C α –C β bond cleavage. Consequently, the optimized P-CN/Bi 2 O 3 catalyst achieves 97.5% conversion of the lignin model compound, 2-phenoxy-1-phenylethanol, and 94.3% benzaldehyde yield under 405 nm light irradiation, drastically outperforming pristine Bi 2 O 3 (31.4% conversion, 30.5% yield) and P-CN (55.8% conversion, 50.9% yield). This work highlights the untapped potential of MOF-derived materials in morphological engineering, offering new design principles for high-performance photocatalytic systems toward sustainable lignin valorization.
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Green Energy & Environment
·
2026
·
IF 16.7
Na Wang,Wenting Lu,Fengyan Han,Weiping Xiao,Xiaofei Yang
The electron density of Ce active center is modulated via constructing the Ce–O–Bi configuration in Ce-doped BiOX (X = Cl, Br, I). • Halogen-induced differences in electronegativity and ionic radius effectively modulate Bi–O lattice symmetry and electronic properties. • The optimal 2.5%Ce-BOB catalyst delivers excellent H 2 O 2 selectivity, high production yield and favorable 2e - ORR kinetics. • In-situ electro-generated H 2 O 2 realizes efficient electro-Fenton degradation of organic dye pollutants. The selectivity of two-electron oxygen reduction reaction (2e - ORR) is predominantly determined by the adsorption strength of the key intermediate *OOH on the catalyst active sites, which has often been tuned by 3d transition-metal doping. Herein, we fabricate rare earth Ce doped bismuth oxyhalide (BiOX, X = Cl, Br, I) catalysts. The built in Ce–O–Bi local configuration triggers efficient charge rearrangement and tunes the surface electron density of Ce active centers. Meanwhile, the differences in ionic radius and electronegativity among halogen species can modulate the symmetry of the Bi–O lattice, thereby forming a typical volcano-type correlation between the bond length and 2e - ORR catalytic performance. The synergistic effect of Ce doping and halogen modulation endows the 2.5%Ce-BOB catalyst with optimal 2e - ORR performance. It delivers a H 2 O 2 selectivity of over 90% within the potential range of 0.2-0.6 V and achieves a H 2 O 2 production rate of 2631.4 mmol g -1 h -1 at 0.1 V. Furthermore, this optimized catalyst demonstrates potential application in organic wastewater treatment, where the degradation efficiency of methylene blue (MB) reaches approximately 95% in 40 min and that of rhodamine B (RhB) approaches 99% in 15 min. This work provides new insights into the rational design of electrocatalysts and environmental applications of electrosynthesized H 2 O 2 via the synergistic regulation of rare-earth metal doping and halogen modulation. The synergistic strategy integrating Ce-doping and halogen modulation finely tailors the electronic environment of Ce active centers, endowing the 2.5%Ce-BOB electrocatalyst with favorable H 2 O 2 selectivity, considerable production capacity and effective electro-Fenton degradation of organic dyes. Download: Download high-res image (284KB) Download: Download full-size image
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Jing Zhang,Zhi Song,Boxia Liu,Dongxu Han,Xiayan Zhang,Jialu Liu,Yeqiong Huang,Chuhan Xing
Prussian blue analogues (PBAs) show potential in pollutant degradation, but are often limited by crystal structure regulation and insufficient exposure of active sites. In this study, Bi doping was used to synergistically optimize the crystal structure and electronic environment of CuFe-PBA and construct an efficient CuFe-Bi-3 catalyst for peroxymonosulfate (PMS) activated degradation of tetracycline (TC). The introduction of Bi induces crystal plane reconstruction, enhances the Cu 2+ /Cu + and Fe 3+ /Fe 2+ cycles, and increases the exposure of active sites. The TC degradation rate of CuFe-Bi-3 increased from 72.2 % to 92.1 % within 80 min, and the reaction rate constant increased from 0.01133 to 0.02631 min −1 . Mechanistic studies have shown that Bi regulation promotes the directional generation and utilization of 1 O 2 , constructing a synergistic oxidation pathway dominated by non-free radicals. A comprehensive comparison of EPR signals for various reactive oxygen species showed that the 1 O 2 signal was the strongest, significantly higher than O 2 •- , •OH and SO 4 •- . The system has good stability in various water qualities and a wide pH range, and toxicity assessment also shows that it can effectively reduce the toxicity of degradation products. This study provides theoretical support and application reference for the structure-electronic regulation of PBAs catalysts and Bi doping to construct an environmentally friendly and efficient PMS activation system in a complex water environment.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Nanzhu Nie,Dan Zhang,Zuochao Wang,Shijie Ge,Yanli Gu,Bo Yang,Jianping Lai,Lei Wang
Achieving acidic seawater hydrogen production under commercial current densities remains a challenge. We present here a novel strategy through strong metal-support interaction (SMSI) and Pt-p-block alloys (PtM@CNT, M = Ga, In, Pb, and Bi) to construct a stable electronic perturbation and achieve acidic seawater hydrogen evolution performance at commercial current densities for the first time. SMSI stabilizes electronic perturbation and promotes durability up to 360 h. The optimized Pt 61 Ga 39 @CNT exhibits an overpotential of 18 mV at 10 mA cm −2 in 0.5 M H 2 SO 4 and maintains 360 h stability at 500 mA cm −2 in acidic seawater. Density functional theory (DFT) calculation reveals that the optimized d -band center of Pt and ΔG H* increase the catalytic activity, and the higher vacancy formation energy enhances the durability. Overall, this discovery not only first achieves stable acidic seawater hydrogen production under commercial current densities, but also opens a new opportunity to explore catalytic applications of p-block alloys and SMSI stabilized electronic perturbation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
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IF 5.774
Qiangshun Wu,Siqi Chai,Hanpei Yang,Zhao Gao,Ruichen Zhang,Lina Wang,Li Kang
A novel composite photocatalyst of Bi/BiOBr-Bi 5+ was successfully developed via a facile two-step procedure. The co-existence of self-doped Bi 5+ and in-situ deposited Bi(M) was evidenced by X-ray diffraction, field-emission transmission electron microscope and X-ray photoelectron spectra. Its photocatalytic performance on the Rhodamine B (RhB) degradation under visible light irradiation displayed a significant improvement compared with that of Bi/BiOBr or BiOBr-Bi 5+ , which was mainly attributed to the synergistic effect between Bi(M) and Bi 5+ . For Bi(M), enhancement of visible-light absorption capacity was beneficial from surface plasmon resonance (SPR) effect while the promoted separation of photoinduced charge carriers was attributed to the formation of oxygen vacancies (OVs) and Schottky-barrier. Besides, Bi(M) induced a predominant exposure of (0 1 0) facet, further enhancing photocatalytic performance. Differently, Bi 5+ brought a narrowed bandgap of BiOBr in increasing the carrier density. A plausible mechanism towards RhB degradation was proposed based on analysis of electron transfer pathway and determination of dominant active species. The work offers new routes to enhance the photocatalytic performance of Bi-based materials without introducing any impurities.
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MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 5
·1-11
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IF 6.232
Zheng Xiaoke,Li Chenghui,He Yaqin,Wu Lan,Hou Xiandeng
In this work, a novel bi-modal imaging probe with enhanced CT contrast efficiency and FL brightness was constructed, in which the combination of a binary CT contrast agent BaHoF 5 and Cu-doped QDs served as a vehicle; hyaluronic acid (HA) was employed as a tumor-targeting ligand. With its CT contrast efficiency about 2.1- and 3.9-fold higher than PEG-BaHoF 5 and Iohexol, the CT contrast efficiency and the fluorescent brightness of the bi-modal probe were both enhanced. Likewise, its fluorescent brightness is almost 6-fold brighter after Cu-doped QDs loading. The most important contribution of this work lies on the proposed strategy. The inherent contradiction of the imaging sensitivity of CT and FL imaging is well balanced and a great CT/FL bi-modal imaging performance is simultaneously obtained even at low concentration (400 μg/mL) of the probe, which was superior to the previous CT/FL bi-modal probes. Moreover, since BaHoF 5 as a binary CT contrast agent was introduced instead of conventional Au and Bi 2 S 3 , the CT/FL bi-modal probe would be more suitable for different patients under different operation voltages. In addition, the in vitro tumor cell imaging also demonstrated a good photo-stability, FL brightness, and tumor-targeting capability of the probe, indicating its great potential in practical bi-modal imaging for further tumor diagnosis and therapy.
A novel bi-modal imaging probe with enhanced CT contrast efficiency and FL brightness was fabricated, in which its CT contrast efficiency was about 2.1- and 3.9-fold higher than PEG-BaHoF 5 and Iohexol, respectively, and its fluorescent brightness almost 6-fold brighter after Cu-doped QDs loading.
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Nanoscale
·
2023
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IF 6.7
Leliang Cao,Jie Huang,Xueying Wu,Ben Ma,Qingqing Xu,Yuanhong Zhong,Ying Wu,Ming Sun,Lin Yu
Bismuth-based materials have been validated to be a kind of effective electrocatalyst for electrocatalytic CO2 reduction (ECR) to formate (HCOO−). However, the established studies still encounter the problems of low current density, low selectivity, narrow potential window, and poor catalyst stability. Herein, a bismuth-terephthalate framework (Bi-BDC MOF) material was successfully synthesized. The optimized Bi-BDC-120 °C exhibited excellent activity, selectivity, and durability for formate production. At an operating potential of −1.1 V vs. RHE in 0.1 mol L−1 KHCO3 electrolyte, the ECR catalyzed by Bi-BDC-120 °C achieved a Faraday efficiency (FE) of 97.2% towards formate generation, and the total current density reached about 30 mA cm−2. The operating potential window with FEformate values > 95% ranged in −0.9 to −1.5 V vs. RHE. The density-functional theory (DFT) calculation demonstrated that the (001) crystalline planes of Bi-BDC are preferable for the adsorption of CO2 and the conversion of *OCHO intermediates, thus ultimately promoting the electrocatalytic production of formate. Although the MOF structure of Bi-BDC-120 °C was insufficiently stabilized, the FEformate could be maintained at around 90% after 36 h of ECR operation. The long-term durability for formate production was attributed to the fact that the in situ reconstructed Bi2O2CO3 could retain the Bi–O active sites in the structure. These results offer an opportunity to design CO2 reduction electrocatalysts with high activity and selectivity for potential applications.
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COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Yiqing Wang,Shihu Han,Xiaoping Hu,Wenxiong Li,Bing Na,Changqiong Xie,Xiuli Wang
Epoxy resin (EP) is widely used in automobiles, aerospace, electrical and electronic fields. However, the overloading of flame retardant will heavily deteriorate the mechanical properties of EP. In this paper, flame retardant nanosheets (FH) with hierarchical layered structure was self-assembled by combining ferrocene formaldehyde (Fc-CHO) and hexa-aminophenoxy-cyclotriphosphazene (HACP) through a nucleophilic reaction. The limiting oxygen index (LOI) of the EP/FH2 nanocomposite with a 2 wt% loading of FH increased to 31.3% and the UL-94 V-0 rating was achieved due to the multiple synergistic flame retardant effects between ferrocene and cyclotriphosphazene, as well as the barrier performance of the FH nanosheets. Simultaneously, in the cone calorimeter (CC) test, the peak heat release rate (pHRR) and total smoke production (TSP) were reduced by 30.2% and 19.0% compared with EP, respectively. What's more, toughness of the EP/FH2 nanocomposite were greatly improved owing to the low loading and good compatibility of FH nanosheets in EP. In short, this work provides valuable insights into the design of flame retardant nanosheets and targets to balance the flame retardancy and mechanical properties of EP with low addition amounts.
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ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Dongze Lai,Mingyu Xie,Huawang Zhao,Xiaomin Wu,Bihong Lv,Guohua Jing
Electrochemical reduction of CO 2 into high-value chemicals, such as formic acid (HCOOH), is an important way to resource CO 2 . Interfacial effects through catalyst design are important to improve the ECO 2 RR performance of Bi-based catalysts. A Bi/ATO heterojunction catalyst was constructed. The current density and FE HCOOH of Bi/ATO were 20 mA cm −2 and 95%, respectively, at a potential of -0.97 V, respectively, compared with the reversible hydrogen electrode (RHE). In-situ cyclic voltammetry curves and Raman spectra showed that electron density change occurred between ATO and Bi during the ECO 2 RR process. This Interfacial electron effects increased the conversion of adsorbed CO 2 molecules to HCOOH by reducing the Interfacial resistance. Interfacial electron transfers also prevented the complete reduction of Bi by transferring electrons to ATO during the ECO 2 RR, which stabilized Bi-O structures. Bi-O improved the selectivity for HCOOH, probably by accelerating the formation of an *OCHO intermediate.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Enchao Wang,Li Chen,Xinmiao He,Yucheng Xiang,Shuangyi Jia,Yisheng Chen,Zhongxiang Guo,Junyi Luo,Hui Dan,Yi Ding,Tao Duan
The development of Bi-based composites with low cost, high adsorption capacity and retention is highly desired for iodine gas capture. Herein, three novel Bi-based composites (Bi 0 -SiO 2 , Bi 0 -C/SiO 2 and Bi 0 -C) were prepared by simple sintering process using rice husk as C and SiO 2 sources and applied for iodine gas capture. The results demonstrated that the type of support strongly affected the iodine adsorption and retention. The Bi 0 -SiO 2 , Bi 0 -C/SiO 2 and Bi 0 -C composites exhibited the iodine adsorption capacity of 812, 911 and 1334 mg/g, and the iodine retention ratio of 90.9, 86.9 and 65.4%. The Bi 0 -SiO 2 showed the highest iodine retention because the SiO 2 supports have no affinity for iodine and the adsorption mainly came from the chemical adsorption of Bi 0 (2Bi + 3I 2 = 2BiI 3 ). While the Bi 0 -C exhibited the highest adsorption capacity due to the synergistic adsorption effect between C supports and Bi 0 sites. Except for the chemical reaction, charge transfer between C and I (C-I) also contributed to the iodine adsorption. The results demonstrated that the new Bi-based composites would be promising iodine gas adsorbent and the new strategy could be extended to the development of other adsorbents.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Dingliang Dai,Jianhao Qiu,Guanglu Xia,Yong Tang,Zhonghao Wu,Jianfeng Yao
Core-shell Bi-MOF@BiOX (X = I, Br and Cl) hybrids were fabricated by a one-pot solvothermal strategy via regulating the concentration and type of halogen ions in the Bi-based CAU-17 synthesis. By virtue of the competitive coordination effect to Bi 3+ between CAU-17 and BiOX, CAU-17 was converted into another Bi-MOF with similar structures and compositions. Moreover, Bi 3+ plays the role of “bridge” and endows an intimate interface contact between BiOX and the Bi-MOF, which immensely expedites the charge and mass transportation. The obtained Bi-MOF@BiOX hierarchical heterostructures were applied to photocatalytic elimination of solo and mixed pollutants (Cr(VI)/tetracycline and Cr(VI)/o-nitrophenol), and exhibited favorable performances. Choosing Bi-MOF@BiOI as a typical example, the corresponding performances for Cr(VI) reduction, tetracycline and o-nitrophenol degradation in their solo systems are 14, 10, 8 times higher than those of CAU-17, and 13, 7, 5 times higher than those of BiOI under visible light, respectively. Of note, the above photocatalytic performances could be further improved in the coexisting environment of Cr(VI) and tetracycline or o-nitrophenol, which is attributed to the elevated charge separation efficiency caused by the timely consumption of photo-excited electrons and holes. This work gives some insights into the delicate design of MOF photocatalysts and their applications in environmental restoration.
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