锰催化苄基C—H键氟化反应机理的理论研究

采用密度泛函理论(Density Functional Theory,DFT),对锰催化剂MnIII(salene)F作用下苄基C—H键氟化反应的机理进行了深入的理论研究.对该反应中涉及到的重要中间体和过渡态的能量、Mulliken电荷分布、前线分子轨道等进行了分析.计算结果表明采用[MnIV(OH)(salene)F...     

异质结型AgBr/CuO光催化剂的合成、 光催化活性及再生

采用沉淀法制备了具有p-n异质结结构的AgBr/CuO可见光催化剂, 对其结构进行了表征, 通过甲基橙溶液的降解率评价了AgBr/CuO的光催化活性, 并通过活性物种测试及能带结构分析推测了其光催化机理, 采用3%(质量分数)溴水对使用后的AgBr/CuO进行了再生处理. 结果表明, 在可见光照射下, 0.1 g AgBr/CuO光催化剂30 min对甲基橙溶液(初始浓度为15 mg/L)的降解率高达92%, 远高于同等条件下的AgBr. AgBr/CuO光催化活性提高的原因是AgBr与CuO的复合一方面使催化剂的禁带宽度变宽, 提高了光生电子与光生空穴的氧化还原能力; 另一方面, 在两者之间形成了p-n型异质结结构, 有利于光生电子的转移及光生电子与空穴的分离. 采用绿色环保的溴水再生法可显著恢复催化剂的光催化活性.     

二维/二维FeNi-LDH/g-C3N4复合光催化剂用于促进CO2光还原反应

Photocatalytic reduction of carbon dioxide into chemical fuels is a promising route to generate renewable energy and curtail the greenhouse effect. Therefore, various photocatalysts have been intensively studied for this purpose. Among them, g-C₃N₄, a 2D metal-free semiconductor, has been a promising photocatalyst because of its unique properties, such as high chemical stability, suitable electronic structure, and facile preparation. However, pristine g-C₃N₄ suffers from low solar energy conversion efficiency, owing to its small specific surface area and extensive charge recombination. Therefore, designing g-C₃N₄ (CN) nanosheets with a large specific surface area is an effective strategy for enhancing the CO₂ reduction performance. Unfortunately, the performance of CN nanosheets remains moderate due to the aforementioned charge recombination. To counter this issue, loading a cocatalyst (especially a two-dimensional (2D) one) can enable effective electron migration and suppress electron-hole recombination during photo-irradiation. Herein, CN nanosheets with a large specific surface area (97 m²·g^-1) were synthesized by a two-step calcination method, using urea as the precursor. Following this, a 2D/2D FeNi-LDH/g-C₃N₄ hybrid photocatalyst was obtained by loading a FeNi layered double hydroxide (FeNi-LDH) cocatalyst onto CN nanosheets by a simple hydrothermal method. It was found that the production rate of methanol from photocatalytic CO₂ reduction over the FeNi-LDH/g-C₃N₄ composite is significantly higher than that of pristine CN. Following a series of characterization and analysis, it was demonstrated that the FeNi-LDH/g-C₃N₄ composite photocatalyst exhibited enhanced photo-absorption, which was ascribed to the excellent light absorption ability of FeNi-LDH. The CO₂ adsorption capacity of the FeNi-LDH/g-C₃N₄ hybrid photocatalyst improved, owing to the large specific surface area and alkaline nature of FeNi-LDH. More importantly, the introduction of FeNi-LDH on the CN nanosheet surface led to the formation of a 2D/2D heterojunction with a large contact area at the interface, which could promote the interfacial separation of charge carriers and effectively inhibit the recombination of the photogenerated electrons and holes. This subsequently resulted in the enhancement of the CO₂ photo-reduction activity. In addition, by altering the loading amount of FeNi-LDH for photocatalytic performance evaluation, it was found that the optimal loading amount was 4% (w, mass fraction), with a methanol production rate of 1.64 μmol·h^-1·g^-1 (approximately 6 times that of pure CN). This study provides an effective strategy to improve the photocatalytic CO₂ reduction activity of g-C₃N₄ by employing 2D layered double hydroxide as the cocatalyst. It also proposes a protocol for the successful design of 2D/2D photocatalysts for solar energy conversion.      

高活性低失活In(OH)3纳米晶光催化剂的制备和表征

采用超声沉淀法从In(NO3)3制备出了In(OH)3纳米晶体, 发现其在254 nm紫外光照射下对苯催化活性和活性稳定性比P25-TiO2高得多.     

C/Fe-Bi_2WO_6光催化氧化诺氟沙星废水的效能及其机理

采用树脂碳化和水热两步法制备C/Fe-Bi_2WO_6光催化剂,对不同光催化剂光催化降解诺氟沙星溶液的去除效果进行对比研究。考察了条件因素对诺氟沙星(NOR)溶液在模拟太阳光下光催化氧化降解的影响规律。结果表明,在实验条件下,NOR光催化氧化降解符合L-H拟一级反应动力学模型,在NOR溶液初始浓度10 mg/L、溶液p H=7.0、催化剂用量0.75 g/L、H_2O_2浓度为200 mg/L、500 W氙灯照射60 min条件下,NOR完全分解,表观速率常数K_(app)为0.0751 min-1。采用分子荧光光谱法,对C/Fe-Bi_2WO_6光催化氧化去除NOR体系中羟基自由基生成规律进行研究,并推测了反应机理。结合LC-MS的分析结果,推测了NOR可能的降解路径和中间产物。     

设计p-n同质结构实现碳氮光催化剂的全解水性能

非金属氮化碳(CN)因其独特的光催化性能而备受关注.本文利用水热处理、高温烧结、高能球磨和烧结的方法成功制得一种具有混合结构的CN光催化剂.先以三聚氰胺为原料进行水热处理(180 ℃,24 h),过滤干燥后,转移到高纯氩气保护下的管式炉中,于550 ℃处理1 h得到CN材料.然后将CN用三聚氰胺和氟化铵水热180 ℃处...     

Se掺杂对单层MoS2电子能带结构和光吸收性质的影响

基于密度泛函理论的第一性原理方法,计算了Se掺杂单层MoS₂能带结构和光吸特性,并分析了对其光解水性质的影响。结果表明：本征单层MoS₂为直接带隙结构,禁带宽度为1.740 eV,导带底电位在H⁺/H₂还原势之上0.430 eV,价带顶电位在O₂/H₂O的氧化势之下0.080 eV,具有可见光催化分解水的能力,但氧化和还原能力不均衡,导致单层MoS₂作为光催化剂分解水的效率不高。通过Se掺杂计算发现,单层MoS₂的禁带宽度变为1.727 eV,相应的光吸收谱变化幅度几乎不变,且体系的形成能较低,表明其热力学稳定性良好。然而,导带底电位调整到H⁺/H₂还原势之上0.253 eV,价带顶电位处于O₂/H₂O的氧化势之下0.244 eV,平衡了氧化与还原能力,单层MoS₂可见光催化分解水的效率得到提高。     

非贵金属三元复合Ni(PO3)2-Ni2P/CdS NPs异质结的构建及可见光高效催化产氢性能

结合异质结构建与共催化剂改性, 以花球状Ni(OH)₂为前驱体, 经热磷酸化后得到Ni(PO₃)₂-Ni₂P二元助催化剂, 借助超声化学合成法, 与CdS NPs复合, 形成非贵金属CdS基三元光催化材料Ni(PO₃)₂-Ni₂P/CdS NPs. 以Na₂S-Na₂SO₃为牺牲剂, 在可见光(λ＞420 nm)照射下, 在不借助任何贵金属的情况下, 负载量为8%(质量分数)的Ni(PO₃)₂-Ni₂P/CdS NPs复合材料的光催化产氢速率达到4237 μmol·g^?1·h^?1, 为CdS NPs(217 μmol·g^?1·h^?1)的19倍. 在产氢循环实验中, 反应进行到第6次循环(18 h)后, 复合材料的产氢速率约为初始的89%, 具有较好的稳定性. 与CdS NPs相比, Ni(PO₃)₂-Ni₂P/CdS NPs的吸收边明显红移, 禁带宽度降至1.86 eV, 并降低了H⁺还原的过电位, 显示出增强的光吸收性能和适宜的带隙结构. 通过Ni(PO₃)₂-Ni₂P与CdS NPs之间的协同效应, 有效促进了光生载流子的分离, 提高了产氢活性和稳定性.     

C/Cr2O3/TiO2复合材料的制备及其光催化性能研究

本文以制革含铬革屑为原材料,基于矿物鞣剂复鞣的原理,将Ti(IV)均匀、稳定地负载到含铬革屑上,在氮气氛围下,经高温热解制备得到C/Cr₂O₃/TiO₂光催化剂,并研究了其对四环素(TC)的光催化降解效果及机理。结果表明,C/Cr₂O₃/TiO₂光催化剂具有明显的介孔结构,比表面积较大,为277.47 m²·g^-1,Cr₂O₃和TiO₂已实现复合并负载在生物炭(C)上。通过光催化降解发现,在模拟自然光照下,当催化剂用量为0.04 g,TC初始浓度为50 mg·L^-1,溶液pH为2时,TC的去除率可高达99.99%。结合自由基捕获实验发现,C/Cr₂O₃/TiO₂光催化剂对TC的降解作用主要依靠反应体系中产生的大量·O₂^-,·OH和h⁺。     

Photocatalytic degradation of amoxicillin by carbon quantum dots modified K2Ti6O13 nanotubes: Effect of light wavelength

Novel carbon quantum dots modified potassium titanate nanotubes (CQDs/K₂Ti₆O₁₃) composite was synthesized and exhibited high photocatalytic activity for degradation of amoxicillin under UV and visible lights with nine wavelengths. Better amoxicillin removal was achieved at lower wavelength irradiation due to its higher photo energy.     

SnO_2/TiO_2纳米管复合光催化剂的性能及失活再生

基于微波水热法和微乳液法合成SnO2/TiO2纳米管复合光催化剂.通过X射线衍射(XRD)、配有能量色散X射线光谱仪(EDX)的透射电镜(TEM)和电化学手段对光催化剂进行表征.以甲苯为模型污染物,考察光催化剂在紫外光(UV)和真空远紫外光(VUV)下的性能及失活再生.结果表明,SnO2/TiO2纳米管复合光催化剂形成三元异质结(锐钛矿相TiO2(A-TiO2)/金红石相TiO2(R-TiO2)、A-TiO2/SnO2和R-TiO2/SnO2异质结),促使光生电子-空穴对的有效分离,提高光催化活性.SnO2/TiO2表现出最佳的光催化性能,UV和VUV条件下的甲苯降解率均达100%,CO2生成速率(k2)均为P25的3倍左右.但由于UV光照矿化能力不足,中间产物易在催化剂表面累积.随着UV光照时间的增加,SnO2/TiO2逐渐失活,20 h后k2由138.5 mg·m-3·h-1下降到76.1 mg·m-3·h-1.利用VUV再生失活的SnO2/TiO2,过程中产生的·OH、O2-·、O(1D)、O(3P)、O3等活性物质可氧化吸附于催化剂活性位的难降解中间产物,使催化剂得以再生,12 h后k2恢复到143.6 mg·m-3·h-1.UV和VUV的协同效应使UV降解耦合VUV再生成为一种可持续的光催化降解污染物模式.     

MoS_2/TiO_2复合催化剂的制备及其在紫外光下的光催化制氢活性

为了研究复合光催化剂在光催化中的制氢效率,采用水热法制备了Mo S2纳米片,然后通过水热法在Mo S2纳米片上负载了TiO_2纳米颗粒,形成了Mo S2/TiO_2异质结复合催化剂。采用冷场发射扫描电子显微镜(FE-SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、紫外-可见吸收光谱(UV-Vis)、拉曼光谱(Raman),X射线光电子能谱(XPS)对材料的结构和光学性能表征并进行分析。通过光催化制氢测试对光催化剂进行评价,实验结果表明,在波长为365 nm的紫外光照射下,最高光催化制氢速率为1004μmol·h-1·g-1,对应的催化剂的Mo S2含量为30%,其催化速率远大于单一的Mo S2和TiO_2,表明Mo S2/TiO_2复合催化剂在紫外光照下能显著提高光催化产氢性能。基于Mo S2/TiO_2复合光催化剂优越的光催化产氢性能,本文对复合光催化剂的产氢机理做了研究和分析。     

棒状金属有机框架结构PCN-222(Cu)/TiO2复合材料的制备及其高效光催化CO2还原性能

The photocatalytic reduction of CO₂ has attracted considerable attention owing to the dual suppression of environmental pollution and energy shortage. The technology uses solar energy to convert carbon dioxide into hydrocarbon fuel, which is of great significance for achieving the carbon cycle. The development of low-cost photocatalytic materials is critical to achieving efficient solar energy to fuels conversion. One of the most commonly employed photocatalysts is TiO₂. However, it suffers from broad band gap as well as the recombination of photo-excited holes and electron. Hence, in this work, we report the photochemical reduction of CO₂ using rod-like PCN-222(Cu)/TiO₂ composites as photocatalyst through a simple hydrothermal method, in which TiO₂ nanoparticles are anchored at the interface of the SiC rod PCN-222(Cu). Multiple characterization techniques were used to analyze the structure, morphology, and properties of the PCN-222(Cu)/TiO₂ composite. A series of characterizations including X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS), Fourier-transform infrared spectroscopy, photo-electrochemical, and photoluminescence (PL) confirm the successful preparation of PCN-222(Cu)/TiO₂ composites. SEM reveals that the TiO₂ nanoparticles are uniformly distributed on the surface of the rod-shaped PCN-222(Cu)/TiO₂. XRD results show that PCN-222(Cu) and PCN-222(Cu)/TiO₂ composite photocatalysts with good crystal structure were successfully synthesized. According to the DRS results, the prepared PCN-222(Cu)/TiO₂ composite samples exhibit characteristic absorption peaks of metalloporphyrins in the visible region. PL spectroscopy, transient photocurrent response, and electrochemical impedance spectroscopy further confirm that the rod-like PCN-222(Cu)/TiO₂ samples have high electron-hole pair separation efficiency. By controlling the mass ratio of PCN-222(Cu) and TiO₂, the photocatalytic CO₂ reduction performance test shows that the 10% PCN-222(Cu)/TiO₂ composite achieves optimal catalytic performance, yielding 13.24 μmol·g⁻¹·h⁻¹ CO and 1.73 μmol·g⁻¹·h⁻¹ CH₄, respectively. All the rod-like PCN-222(Cu)/TiO₂ composites exhibit better photocatalytic CO₂ activity than that of TiO₂ nanoparticles or PCN-222(Cu) under the illumination of xenon lamps, which is attributed to charge transport and electron-hole separation capabilities. After three test cycles, the catalytic activity of PCN-222(Cu)/TiO₂ photocatalyst was virtually unchanged. The reduction yield of the catalyst increased for 8 h under continuous illumination, indicating that PCN-222(Cu)/TiO₂ composites have acceptable stability. The estimation of the band gap curve and the Mote-Schottky curve test show that the lowest unoccupied molecular orbital position of PCN-222(Cu) is more negative than the TiO₂ of the conduction band; hence, a possible photocatalytic reaction mechanism of the PCN-222(Cu)/TiO₂ composite is proposed. This study provides a new strategy for the integration of metal-organic frameworks and oxide semiconductors to construct efficient photocatalytic systems.     

非贵金属助剂Ni2P修饰类石墨碳氮化物光催化剂增强可见光光催化产氢性能

Energy crisis has become a serious global issue due to the increasing depletion of fossil fuels; therefore, it is crucial to develop environmentally friendly and renewable energy resources, such as hydrogen (H₂), to replace fossil fuels. From this viewpoint, photocatalytic H₂ production is considered as one of the most promising technologies. Noble metal platinum (Pt) can be applied as an efficient cocatalyst for improving the H₂ production performance of photocatalytic systems; however, its high cost limits its further application. Thus, the development of novel, high-activity, and low-cost cocatalysts for replacing noble metal cocatalysts is of great significance for use in photocatalytic H₂ evolution techniques. Herein, we successfully synthesized a Ni₂P/graphite-like carbonitride photocatalyst (Ni₂P/CN) using a conjugated polymer (SCN)_n as precursor for enhanced photocatalytic H₂ production under visible light illumination. Various characterization techniques, including optical and photoelectronic chemical tests, were used to investigate the structural composition, morphology, and light adsorption ability of these materials. X-ray diffraction, Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy results showed that Ni₂P/CN nanocomposites with good crystal structure were obtained. Scanning electron microscopy and transmission electron microscopy results revealed that the Ni₂P/CN samples had a typical two-dimensional layered structure, and the Ni₂P nanoparticles were uniformly loaded on the surface of the CN to form a non-noble metal promoter. UV-Vis diffuse reflectance spectra results demonstrated that the loading of Ni₂P nanoparticles effectively enhances the adsorption capacity of CN to visible light. Photoluminescence spectroscopy and photocurrent (PL) results suggested that Ni₂P loading to CN is beneficial for promoting the migration and separation efficiency of photogenerated carriers. Photocatalytic H₂ production was conducted under visible light irradiation with triethanolamine as a sacrificial agent. The results suggest that the Ni₂P/CN composite photocatalysts exhibit excellent photocatalytic reduction performance. In particular, the H₂ evolution rate of the optimal Ni₂P/CN nanocomposite is 623.77 μmol·h^-1·g^-1, which is higher than that of CN modified by noble metal Pt, i.e., 524.63 μmol·h^-1·g^-1. In conclusion, Ni₂P nanoparticles are homogeneously attached to the surface of CN, and a strong interfacial effect exists between them, thereby forming an electron transfer tunnel that greatly inhibits the recombination of photoinduced carriers and promotes the migration of electrons from CN to Ni₂P. In addition, a possible photocatalytic mechanism is proposed based on the experiments and characterizations. This work has profound significance for developing non-noble metal cocatalysts for the substitution of noble metal cocatalysts for high-efficiency photocatalytic H₂ evolution.      

铋掺杂介孔二氧化钛的制备及光催化动力学

以介孔分子筛(KIT-6)为载体,采用溶液浸渍法合成了铋(Bi)掺杂的介孔二氧化钛(TiO₂)光催化剂。利用XRD、TEM、SEM、XPS、N₂吸附-脱附法和拉曼光谱法等技术手段对材料的结构和形貌进行表征。通过紫外-可见吸收光谱法考察了催化剂对罗丹明B光催化降解效率,进一步考察了Bi的掺杂量对光催化反应速率的影响,并对光催化降解动力学进行了初步研究。结果表明,Bi掺杂的介孔TiO₂具有较窄的孔径分布(3~4 nm),而且吸收范围扩展到可见光区,其光催化活性明显高于商品TiO₂(P25)。随之Bi掺杂量的提高,反应速率常数也增大,其光催化降解罗丹明B的反应均符合准一级动力学方程。     

富含光诱导氧空位Bi12O17Br2的制备及其高效光催化固氮性能(英文)

采用一步水热法制备了Bi₁₂O₁₇Br₂光催化剂,其平均微片尺寸为1.2μm,比表面积约为29 m²·g^-1。Bi₁₂O₁₇Br₂的禁带宽度为2.42 eV,能够响应可见光。值得注意的是,在光照条件下Bi₁₂O₁₇Br₂表面能够产生氧空位;光诱导氧空位不仅能促进氮气在催化剂表面的吸附,而且对吸附的氮气分子的活化起到至关重要的作用。实验结果表明在可见光照射下,Bi₁₂O₁₇Br₂光催化剂上的氨生成速率为337.6μmol·g^-1·h^-1。在可见光的驱动下,Bi₁₂O₁₇Br₂光催化剂能够实现氮气与水反应生成氨的过程。     

四氧化三锡基光催化纳米材料的研究进展

半导体光催化技术实现了太阳能向化学能的转化, 旨在解决日益严重的能源和环境问题, 达到可持续的能源利用. 由于大的比表面积和更多的表面缺陷, 纳米尺寸的催化剂表现出比块状材料更大的潜力. 目前, 四氧化三锡纳米材料因其生态友好和含量丰富而受到关注, 同时其具有合适的带隙(2.5~2.8 eV), 是一种极具潜力的新型可见光光催化剂. 本文综述了四氧化三锡基光催化纳米材料的最新研究进展, 从材料改性和应用两方面进行了阐述, 并展望了其未来发展方向, 为开发新型高效的四氧化三锡基纳米材料提供了指导.     

Optimizing electronic structure and charge transport of sulfur/potassium co‐doped graphitic carbon nitride with efficient photocatalytic hydrogen evolution performance

Recently, graphitic carbon nitride (CN) has been widely investigated for solar energy conversion through water splitting, but its low photocatalytic activity needs to be further improved and optimized. Herein, S/K co‐doped CN photocatalysts have been fabricated by condensation of thiourea and dithiooxamide followed by post‐treatment in molten salt. As evidenced by XRD patterns and UV–vis DRS plots, the engineering crystalline and electronic structure of all as‐prepared samples have been explored through tailoring the mass ratio of thiourea and dithiooxamide as well as ratio of molten salt/the precursor. After optimization, the as‐prepared S/K co‐doped CN photocatalysts with needle‐like nanorods structure exhibit excellent hydrogen evolution rate of 1962.10 μmol^?1 g^?1 h^?1. While its photocatalytic activity is lower than that of pure CN by molten salt treatment (K‐doped CN) (2066.40 μmol^?1 g^?1 h^?1), which results from that the K content of S/K co‐doped CN photocatalyst is lower than that of K‐doped CN. Moreover, compared with K‐doped CN, S/K co‐doped CN photocatalyst possesses higher photocatalytic performance when irradiated by a light source (λ > 520 nm). This might be ascribed to the fact that the introduction of sulfur can expand light absorption region (λ > 520 nm), whereas K cannot improve light absorption of CN in this wavelength region. Furthermore, DFT calculation reveals that both S and K atoms can offer more electrons to band gap, leading to the formation of metallic‐character band structure. In addition, K atom can intercalate in the interlayer of CN and bridge the adjacent two layers, leading to the formation of charge delivery channels. These results demonstrate that S/K co‐doped CN photocatalysts facilitate the separation and transport of photogenerated charge carries, resulting in the efficient photocatalytic activity for hydrogen evolution. Besides, a competition between sulfur and potassium atom during the synthesis process is also discussed in details.     

Bi_(20)TiO_(32)/聚丙烯腈复合纳米纤维的制备及其对异丙隆的光催化降解性能

采用溶剂热法制备了可见光响应型光催化剂Bi_(20)TiO_(32),为了实现该光催化剂的固定化负载,进一步以Bi_(20)TiO_(32)和聚丙烯腈(PAN)为原料,通过同轴静电纺丝法制备了不同光催化剂含量的Bi_(20)TiO_(32)/PAN复合纳米纤维。通过这一途径一方面可以便于光催化剂的回收利用,另一方面纳米纤维结构可以提高光催化剂与有机污染物反应的接触面积。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、紫外-可见漫反射光谱(UV-Vis DRS)和氮气吸附-脱附法对样品的物相组成、形貌结构、光谱吸收和比表面积等进行表征。研究了在可见光照射下Bi_(20)TiO_(32)/PAN复合纳米纤维膜对苯脲类农药异丙隆的光催化降解性能。结果显示,制备的Bi_(20)TiO_(32)光催化剂禁带宽度为2.35 eV,属于典型的可见光响应型光催化剂。制备的Bi_(20)TiO_(32)/PAN复合纳米纤维直径在600~700 nm,Bi_(20)TiO_(32)可以在纳米纤维表面均匀负载,复合纳米纤维膜对可见光具有明显的响应性,对异丙隆具有很好的光催化降解效果,其中光催化剂质量分数为25.7%的样品S3对异丙隆的降解率最高可达到87%。这一研究表明,通过同轴静电纺丝法将光催化剂负载于有机纳米纤维表面,可以保持光催化剂原有光催化效果,是实现光催化剂固定化一条较好的途径。     

{110}晶面取向Ag3PO4多面体的水热制备及可见光催化活性

采用简易水热法在聚乙二醇-6000 (PEG-6000)辅助下合成了Ag₃PO₄多面体.系统考察了水热反应温度、时间及PEG-6000用量对产物形貌和结构的影响.通过X射线衍射(XRD),扫描电子显微镜(SEM),紫外-可见漫反射光谱(UV-Vis DRS)和荧光(PL)光谱等测试手段对光催化剂进行了表征.结果表明,适宜的水热温度及PEG-6000用量是制备具有{110}活性晶面取向Ag₃PO₄多面体的必要条件,该多面体通过纳米颗粒的Ostwald熟化效应生长而成.可见光催化降解罗丹明B (RhB)的实验表明,该Ag₃PO₄多面体活性明显优于其它水热条件下所制备的非{110}取向晶面样品和离子交换法所得纳米颗粒,其降解反应速率常数(k)为离子交换法所得Ag₃PO₄纳米颗粒的8.3倍.总有机碳含量(TOC)及循环实验证明,该Ag₃PO₄多面体可以有效地矿化RhB并保持较好的循环稳定性.活性自由基捕获实验表明,空穴(h⁺)和羟基自由基(·OH)是光催化氧化的主要活性物种.结合活性物种的氧化还原电位以及Ag₃PO₄的能带结构分析,提出了催化反应界面光生电子-空穴(e^--h⁺)对的分离及转移机制.