JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Feihu Zhang,Xinyan Xiao,Yu Xiao
A novel 3D hierarchical flower-like BiOBr/Bi 3 O 4 Br heterostructure photocatalyst was synthesized by in-situ growth of ultrathin BiOBr on the surface of Bi 3 O 4 Br nanosheets through a solvothermal process. The 3D hierarchical heterostructure endows BiOBr/Bi 3 O 4 Br heterojunction with a large specific surface area and tight interfacial contact, which can provide sufficient channels for carrier migration. The introduction of Bi 3 O 4 Br can enhance the light absorption ability of BiOBr/Bi 3 O 4 Br photocatalysts. Furthermore, the staggered type II heterostructure energy band alignment formed between BiOBr and Bi 3 O 4 Br can promote the separation of photo-excited carriers. The improved performance of carrier migration and light absorption ability was evaluated by SEM, TEM, BET, EIS , and DRS tests. The results of transient photocurrent response and photoluminescence tests confirmed the improvement for separating photoexcited carriers. The optimal 20% BiOBr/Bi 3 O 4 Br sample exhibited the greatest photocatalytic degradation rate of 97.1% for RhB and 89.4% for TC, under 90 min of simulated solar light irradiation. Its apparent rate constant k values are 0.03378 and 0.02013 min −1 , being 9.44 and 2.18 folds than that of Bi 3 O 4 Br, 2.76 and 1.47 folds than that of BiOBr. The free radical scavenging experiment results showed that h + and •O 2 - are the prime active species during the photodegradation process. Hence, a possible photocatalytic mechanism of type II BiOBr/Bi 3 O 4 Br heterojunction was proposed.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Huijia Jin,Qian Liu,Matin Naghizadeh,Li Guan,Sheying Dong,Tinglin Huang
The degradation of antibiotics in wastewater poses a critical environmental challenge, necessitating the development of advanced photocatalysts capable of efficiently generating active species. Hence, a novel Zn 3 In 2 S 6 /Bi 3 O 4 Br (ZB) heterojunction enriched with oxygen vacancies (OVs) was designed. The optimized ZB-1 (mass percentage of Bi 3 O 4 Br to Zn 3 In 2 S 6 = 1 %) exhibited the highest nitrofurazone (NFZ) degradation rate constant ( k ) of 0.24 min −1 after 20 min illumination, which was 6.6 and 26.3 folds of the original Zn 3 In 2 S 6 and Bi 3 O 4 Br, respectively. ZB-1 also demonstrated excellent cycling durability and resistance to pH fluctuation. The OVs potentiated O 2 adsorption and drew the photogenerated electrons for oxygen (O 2 ) activation, thereby enhancing carrier mobility. Furthermore, the constructed heterojunction facilitated light absorption and carrier migration for O 2 activation. The OVs and heterojunctions collaboratively meliorated carrier utilization and active species generation. As a result, abundant superoxide radicals ( O 2 − ) were generated and significantly contributed to eliminating NFZ. Meanwhile, the photocatalytic mechanism was clarified by theoretical calculation. The degradation pathway of NFZ and the biotoxicity of its intermediates were systematically conjectured. This research provides a new perspective for designing efficient, durable, and reproducible photocatalysts, which can help address environmental issues related to antibiotic contamination.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Jing Ji,Xianbo Sun,Weiyu He,Yongdi Liu,Jun Duan,Wen Liu,Long D. Nghiem,Qilin Wang,Zhengqing Cai
A new type of solar active carbon-doped Bi 3 O 4 Br catalyst was synthesized by combining hydrothermal and post-thermal treatment. The activity of the material under sunlight and visible light was 3.3 times and 2.7 times that of Bi 3 O 4 Br, respectively. The C-doping on Bi 3 O 4 Br nanosheets increased the built-in electric field strength , thus significantly promoted the migration of charge carriers and enhanced the photocatalytic activity. In addition, replacing Br with C with a smaller atomic radius can shorten the interlayer spacing, which is beneficial to carrier separation. Experiments showed that the doping of C shortened the semiconductor band gap by 9.8% and expanded the absorption range of visible light. Among the photogenerated reactive species, h + played a major role in the degradation of 1-methylpyrene (a typical polycyclic aromatic hydrocarbons), followed by O 2 ∙ - and •OH. Based on intermediate analysis and DFT calculation, we proposed the degradation mechanism and pathways. Quantitative structure–activity relationship (QSAR) analysis showed that some toxic intermediates were produced during the photocatalysis process, but the overall environmental risk was greatly reduced. This work provides new perspective for understanding non-metallic doping in semiconductor photocatalysts to enhance the built-in electric field, and this technology can be extended to other semiconductor materials.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
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IF 9.446
Jian-guo Guo,Ying Liu,Ying-juan Hao,Yi-lei Li,Xiao-jing Wang,Rui-hong Liu,Fa-tang Li
Heterostructured Bi 3 O 4 Br/α-Bi 2 O 3 nanocomposites are prepared via in situ one-step self-combustion of ionic liquids. Tetrabutylammonium bromide (TBAB) is employed to be fuel, complexing agent for ionic liquids, as well as the reactant supplying Br for the objective material. The ratio of Bi 3 O 4 Br/α-Bi 2 O 3 can be easily adjusted by controlling the amount of TBAB. The heterojunctions show higher photocatalytic ability towards both azo dye methyl orange (MO) and colorless pollutant phenol . The electron spin resonance (ESR) test and p-nitro blue tetrazolium chloride (NBT) degradation result indicate that generation amounts of superoxide anion radicals ( O 2 − ) over heterojunctions are less than that over pure Bi 3 O 4 Br. Photoelectrochemical measurements show that separation efficiencies of photo-generated electrons and holes are decreased after the combination of Bi 3 O 4 Br and α-Bi 2 O 3 . Work function test and scavenger experiments display that holes play key role for pollutant degradation and the position of holes on α-Bi 2 O 3 is lowered via hybridization. Thus, the enhanced photocatalytic activity over composites can be attributed to the position decline of α-Bi 2 O 3 valence band, thus improving the reactivity of holes in direct oxidation of pollutants. In this case, valence band position is confirmed to be more important than separation efficiency of charge carriers in affecting photocatalytic performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Bowen Chen,Yuanwen Hou,Hanke Li,Hejun Gao,Hongquan Fu,Fang Liao,Juan Zhang,Yunwen Liao
The catalytic conversion of nitrogen to ammonia is one of the most significant processes in nature and the chemical industry. However, the traditional Haber-Bosch process of ammonia synthesis consumes substantial energy and emits a large amount of carbon dioxide . The efficiency of photocatalytic N 2 activation is severely limited by the lack of N 2 adsorption sites and poor carrier utilization. Herein, an efficient α-Bi 2 O 3 /Bi 3 O 4 Br heterojunction is proposed with a photocatalytic nitrogen fixation activity of 238.67 μmol·g −1 ·h −1 . Compared with the BiOBr precursor, α-Bi 2 O 3 and Bi 3 O 4 Br, the α-Bi 2 O 3 /Bi 3 O 4 Br heterojunction with oxygen vacancies can improve the adsorption and activation capacity of N 2 and promote the separation efficiency of charge carrier pairs by accommodating photogenerated electrons under visible light through the mechanism of N -type semiconductors. Therefore, oxygen vacancies and heterojunction engineering of semiconductive nanomaterials provide a promising method for the rational design of photocatalysts to enhance the rate of ammonia synthesis under mild conditions.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
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IF 6.1
Feihu Zhang,Xinyan Xiao,Yu Xiao,Xia Cheng
An innovative 3D flower-like BiOI/Bi 3 O 4 Br hierarchical heterostructures complex material was firstly constructed via in-situ growth of ultrathin BiOI on Bi 3 O 4 Br by a simple precipitation method. Under the simulated solar-light illumination for 90 min, the optimal 60% BiOI/Bi 3 O 4 Br composite displayed the highest photodegradation rate of 96.4% for RhB, 80.0% for TC and 77.2% for MO. The corresponding apparent rate constants were 0.0314, 0.0167 and 0.0110 min −1 , which were 8.26, 1.82 and 3.24-times than that of Bi 3 O 4 Br, 44.86, 11.13 and 2.62-times than that of BiOI. The improved photodegradation activity could be owing to the following reasons: 1) The 3D hierarchical heterostructures endowed BiOI/Bi 3 O 4 Br with tight interfacial contact, which can supply sufficient migration channels for photoinduced carriers; 2) The Z-scheme charge migrate pathway promoted the segregation of photocarriers while maintaining a robust redox ability; 3) The BiOI/Bi 3 O 4 Br heterostructures reinforced light absorption edges more than 600 nm and augmented specific surface areas over 60 m 2 ·g −1 . In addition, the various photocatalytic conditions were studied to imitate the degradation process of RhB in the real aqueous system. The radical capture experiments and EPR test attested that h + and O 2 − played an important part in the photodegradation of RhB.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Yuzhao Wang,Fangxia Xie,Rui Li,Zhuobin Yu,Xuan Jian,Xiaoming Gao,Houfen Li,Xiao Zhang,Jianxin Liu,Xiaochao Zhang,Yawen Wang,Caimei Fan,Xiuping Yue,Aijuan Zhou
Enhanced photocatalytic active species generation is an important strategy for tuning its visible-light photocatalytic activity, which is highly related to the separation and transfer of photogenerated charge carriers. In this study, we successfully prepared a novel Bi 3 O 4 Br/Ti 3 C 2 two-dimensional/two-dimensional (2D/2D) Schottky junction with special interfacial charge transfer channel via in-situ growth of Bi 3 O 4 Br on the surface of ultrathin Ti 3 C 2 . The relevant characterization results indicated that Bi 3 O 4 Br/Ti 3 C 2 had a stable structure and tight interface binding, which shortened the distance of charge transfer, promoted the separation of photogenerated electron-hole pairs, and then enhanced the generation of active species. Therefore, the optimized photodegradation activity and TOC removal efficiency of Bi 3 O 4 Br/Ti 3 C 2 on Bisphenol A (BPA) could reach 91.26% and 70.97% within 60 min visible-light irradiation, respectively. Furthermore, intermediate products and BPA degradation pathways were determined. This work provides a new protocol for the construction of 2D/2D heterojunction photocatalytic systems and regulating photocatalytic active species generation by electronic effective transporting.
研究领域:
材料科学
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环境科学
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光催化技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Zhifeng Li,Haowen Yan,Zhaoyi Yin,Guofeng Zhang,Yichao Wang,Sicheng Gao,Jie Pan,Zhiguo Song,Jianbei Qiu,Yongjin Li
The efficient utilization of near-infrared (NIR) light is an important challenge to extend the spectral response range of photocatalysts. Here, the NIR photocatalytic performance of Bi 3 O 4 Br nanosheets was significantly enhanced by a rare earth ion doping strategy that synergistically utilizes the dual mechanism of photon conversion and energy band modulation. Under 980 nm excitation, the Bi 3 O 4 Br:Er 3 + nanosheets exhibit near-single-band green upconversion (UC) emission and are reabsorbed by Bi 3 O 4 Br. Combined with DFT density of states calculations, it is shown that the band gap of the material has been lowered and the carrier transport paths have been optimized by the energy-band structural tuning. In the NIR photocatalytic degradation experiment of bisphenol A, Bi 3 O 4 Br was not degraded, and Bi 3 O 4 Br:Er 3+ showed better performance, which was 2.27 times higher than that of Bi 3 O 4 Br:Yb 3+ , Er 3+ . ESR testing and capture experiments indicate that under NIR light irradiation, •OH and e − are the primary active species in the photocatalytic reaction process. This work provides new design ideas for the development of efficient NIR photocatalytic materials.
研究领域:
材料科学
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催化化学
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纳米技术
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产品关联
DOI
高影响因子
ACS ES&T Water
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2024
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IF 4.8
Ya-Meng Dong,Bin Li,Zi-Hang He,Qin-Chen Li,Tong Li,Chang Liu,Xing Zhang
Photocatalytic technology still faces significant challenges in removing trace concentrations of organic pollutants from wastewater. In this study, we synthesized Bi3O4Br/MXene (BOB/M) with a Schottky junction structure, enhancing the continuous adsorption active site regeneration after visible light irradiation for organic pollutant removal. Notably, the adsorption removal rate of tetracycline by BOB/M under light irradiation increased by 29.2% compared to dark conditions, indicating that light exposure regenerates the adsorption active sites. This improvement is mainly attributed to the introduction of MXene, which promotes the formation of reactive species, thereby accelerating the regeneration of the adsorption sites. The composite exhibits superior adsorption performance for electropositive pollutant molecules compared with neutral and negatively charged ones. Moreover, through a series of experiments and analytical characterizations, we identified superoxide radicals as the primary reactive oxygen species responsible for the degradation of tetracycline, facilitating the regeneration of adsorption sites. Furthermore, the BOB/M material exhibits excellent anti-interference capacities and stability. This study provides a novel approach for designing photocatalysts that are effective at targeting trace levels of contaminants.
研究领域:
环境科学
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材料科学
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化学工程
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水处理
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Wenlin Wang,Xianling Wang,Gang Li,Xiuting Wu,Qian Yu,Yan Wang,Xinjie Zhao,Jia Gao,Jing Wang
The design of heterojunction and active crystal face is an effective way to promote the separation and migration of photogenerated charge in the process of photocatalytic reaction. In this work, the band gap intercalation Bi 3 O 4 Br/Bi 2 O 2 CO 3 /g-C 3 N 5 (BBC) ternary photocatalyst was successfully designed by one step hydrothermal method. It is found that under alkaline conditions, the addition of g-C 3 N 5 to Bi 3 O 4 Br leads to the preferential growth of the (0 0 1) crystal face of the third phase Bi 2 O 2 CO 3 , and the (0 0 1) crystal face is the active crystal face of the photocatalytic reaction. In addition, the constructed double Z-scheme heterojunction has two different electron transport pathways and bidirectional interface electric fields, which reduces the electron-hole pair recombination rate, maintains a strong redox ability, and enables the photogenerated carrier to effectively separate and transfer, thus improving the catalytic activity of the material. Under visible light irradiation, 15 %BBC presented excellent catalytic activity, the degradation rates of ARB ( k = 0.0238 min −1 ), HCl-TC ( k = 0.0183 min −1 ) and RHB ( k = 0.0200 min −1 ) exceeded 90 % within 120 min. This work is not only of great significance for the purification of water pollution, but also provides a new way for further exploration of novel composite photocatalytic systems.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Xueting Zhao,Junhao Ma,Jindan Zha,Kuisui Huang,Chenghui Chai,Zhaoyi Yin,Zhiguo Song,Jianbei Qiu,Yongjin Li
Traditional inorganic photoreversible color-switching materials (PCSMs) usually exhibit slow color switching and single color switching characteristics, which severely restrict their use in information storage, anti-counterfeiting, and other applications. Herein, we report a fast photoresponsive color-switching inorganic PCSM based on oxygen-vacancy (OV) Bi3O4Br:Yb3+,Er3+ (BYE-OV) nanosheets. The BYE-OV nanosheets demonstrated considerable photoreduction activity and effective charge carrier separation when exposed to ultraviolet (UV) light, resulting in a rapid change in color from light yellow to dark brown. Moreover, under 980-nm excitation, the green and red emissions of the BYE-OV nanosheets were considerably enhanced, being 9.6 and 8.8 times higher than those of the BYE nanosheets, respectively. Additionally, BYE-OV nanosheets were combined with an agarose hydrogel to produce BYE-OV/agarose nanocomposite films, which exhibited excellent photoreversible color switching and upconversion (UC) luminescence. This research provides new insights into the development of innovative inorganic PCSMs, thereby considerably broadening their potential applications.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Shaoyan Zhang,Wen Zhang,Xinyao Zhao,Xin Li,Jian Wang,Ji Li,Yanqing Liu,Xueying Cheng,Renquan Guan,Junkai Zhang
This study reports the synthesis of MIL–88B(Fe)/Bi 3 O 4 Br, an efficient Z -scheme heterojunction photocatalyst for metronidazole (MNZ) degradation. The composite achieved a degradation efficiency of 95.2 % under visible light irradiation, outperforming the single-component catalysts (MIL–88B(Fe): 39.0 %, Bi 3 O 4 Br: 71.5 %). Photocatalytic treatment reduced biotoxicity, indicating its potential for use and environmental safety. The degradation process of MNZ was revealed by integrating LC–MS data with Fukui function analysis. Photoelectrochemical findings indicate that MIL–88B(Fe) enhanced efficiency, facilitated charge separation, and augmented the spectral response of Bi 3 O 4 Br. The Z–Scheme charge transfer and the function of the built–in electric field were validated by in situ XPS. DFT calculations revealed synergistic effects in the composite system, enhancing the adsorption and photocatalytic properties for MNZ. This study proposed a thorough degradation process that underpinned the development of effective photocatalysts.
研究领域:
环境科学
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材料化学
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光催化
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废水处理
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计算化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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